Package source provides core features for use by Go editors and tools.



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    const (
    	OptionHandled = OptionState(iota)
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    const (
    	UnknownFileAction = FileAction(iota)
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    const (
    	// UnknownKind is a file type we don't know about.
    	UnknownKind = FileKind(iota)
    	// Go is a normal go source file.
    	// Mod is a go.mod file.
    	// Sum is a go.sum file.
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    const (
    	UnknownError = ErrorKind(iota)
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    const CommandPrefix = "gopls."

      CommandPrefix is the prefix of all command names gopls uses externally.

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      const GeneratedAPIJSON = "" /* 12445-byte string literal not displayed */
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      const GoModTidy = "go mod tidy"

        GoModTidy is the source for a diagnostic computed by running `go mod tidy`.


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        var (
        	// CommandTest runs `go test` for a specific test function.
        	CommandTest = &Command{
        		Name:  "test",
        		Title: "Run test(s)",
        	// CommandGenerate runs `go generate` for a given directory.
        	CommandGenerate = &Command{
        		Name:  "generate",
        		Title: "Run go generate",
        	// CommandTidy runs `go mod tidy` for a module.
        	CommandTidy = &Command{
        		Name:  "tidy",
        		Title: "Run go mod tidy",
        	// CommandVendor runs `go mod vendor` for a module.
        	CommandVendor = &Command{
        		Name:  "vendor",
        		Title: "Run go mod vendor",
        	// CommandUpgradeDependency upgrades a dependency.
        	CommandUpgradeDependency = &Command{
        		Name:  "upgrade_dependency",
        		Title: "Upgrade dependency",
        	// CommandRegenerateCgo regenerates cgo definitions.
        	CommandRegenerateCgo = &Command{
        		Name:  "regenerate_cgo",
        		Title: "Regenerate cgo",
        	// CommandToggleDetails controls calculation of gc annotations.
        	CommandToggleDetails = &Command{
        		Name:  "gc_details",
        		Title: "Toggle gc_details",
        	// CommandFillStruct is a gopls command to fill a struct with default
        	// values.
        	CommandFillStruct = &Command{
        		Name:           "fill_struct",
        		Title:          "Fill struct",
        		suggestedFixFn: fillstruct.SuggestedFix,
        	// CommandUndeclaredName adds a variable declaration for an undeclared
        	// name.
        	CommandUndeclaredName = &Command{
        		Name:           "undeclared_name",
        		Title:          "Undeclared name",
        		suggestedFixFn: undeclaredname.SuggestedFix,
        	// CommandExtractVariable extracts an expression to a variable.
        	CommandExtractVariable = &Command{
        		Name:           "extract_variable",
        		Title:          "Extract to variable",
        		suggestedFixFn: extractVariable,
        		appliesFn: func(_ *token.FileSet, rng span.Range, _ []byte, file *ast.File, _ *types.Package, _ *types.Info) bool {
        			_, _, ok, _ := canExtractVariable(rng, file)
        			return ok
        	// CommandExtractFunction extracts statements to a function.
        	CommandExtractFunction = &Command{
        		Name:           "extract_function",
        		Title:          "Extract to function",
        		suggestedFixFn: extractFunction,
        		appliesFn: func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, _ *types.Package, info *types.Info) bool {
        			_, ok, _ := canExtractFunction(fset, rng, src, file, info)
        			return ok
        	// CommandGenerateGoplsMod (re)generates the gopls.mod file.
        	CommandGenerateGoplsMod = &Command{
        		Name:        "generate_gopls_mod",
        		Title:       "Generate gopls.mod",
        		Synchronous: true,
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        var (
        	InconsistentVendoring = errors.New("inconsistent vendoring")
        	PackagesLoadError     = errors.New("packages.Load error")

          Commands are the commands currently supported by gopls.

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          var ErrNoIdentFound = errors.New("no identifier found")

            ErrNoIdentFound is error returned when no identifer is found at a particular position

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            var ErrNoModOnDisk = errors.New("go.mod file is not on disk")
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            var ErrNotAType = errors.New("not a type name or method")
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            var ErrTmpModfileUnsupported = errors.New("-modfile is unsupported for this Go version")


            func CollectScopes

            func CollectScopes(info *types.Info, path []ast.Node, pos token.Pos) []*types.Scope

              CollectScopes returns all scopes in an ast path, ordered as innermost scope first.

              func CommentToMarkdown

              func CommentToMarkdown(text string) string

                CommentToMarkdown converts comment text to formatted markdown. The comment was prepared by DocReader, so it is known not to have leading, trailing blank lines nor to have trailing spaces at the end of lines. The comment markers have already been removed.

                Each line is converted into a markdown line and empty lines are just converted to newlines. Heading are prefixed with `### ` to make it a markdown heading.

                A span of indented lines retains a 4 space prefix block, with the common indent prefix removed unless empty, in which case it will be converted to a newline.

                URLs in the comment text are converted into links.

                func CompareDiagnostic

                func CompareDiagnostic(a, b *Diagnostic) int

                func ComputeOneImportFixEdits

                func ComputeOneImportFixEdits(snapshot Snapshot, pgf *ParsedGoFile, fix *imports.ImportFix) ([]protocol.TextEdit, error)

                  ComputeOneImportFixEdits returns text edits for a single import fix.

                  func Deref

                  func Deref(typ types.Type) types.Type

                    Deref returns a pointer's element type, traversing as many levels as needed. Otherwise it returns typ.

                    func Diagnostics

                    func Diagnostics(ctx context.Context, snapshot Snapshot, pkg Package, withAnalysis bool) (map[VersionedFileIdentity][]*Diagnostic, bool, error)

                    func DocumentSymbols

                    func DocumentSymbols(ctx context.Context, snapshot Snapshot, fh FileHandle) ([]protocol.DocumentSymbol, error)

                    func FileDiagnostics

                    func FileDiagnostics(ctx context.Context, snapshot Snapshot, uri span.URI) (VersionedFileIdentity, []*Diagnostic, error)

                    func FindPosInPackage

                    func FindPosInPackage(snapshot Snapshot, searchpkg Package, pos token.Pos) (*ParsedGoFile, Package, error)

                      FindPosInPackage finds the parsed file for a position in a given search package.

                      func Format

                      func Format(ctx context.Context, snapshot Snapshot, fh FileHandle) ([]protocol.TextEdit, error)

                        Format formats a file with a given range.

                        func FormatHover

                        func FormatHover(h *HoverInformation, options *Options) (string, error)

                        func FormatNode

                        func FormatNode(fset *token.FileSet, n ast.Node) string

                          FormatNode returns the "pretty-print" output for an ast node.

                          func FormatType

                          func FormatType(typ types.Type, qf types.Qualifier) (detail string, kind protocol.CompletionItemKind)

                            FormatType returns the detail and kind for a types.Type.

                            func FormatVarType

                            func FormatVarType(ctx context.Context, snapshot Snapshot, srcpkg Package, obj *types.Var, qf types.Qualifier) string

                              FormatVarType formats a *types.Var, accounting for type aliases. To do this, it looks in the AST of the file in which the object is declared. On any errors, it always fallbacks back to types.TypeString.

                              func FromProtocolEdits

                              func FromProtocolEdits(m *protocol.ColumnMapper, edits []protocol.TextEdit) ([]diff.TextEdit, error)

                              func GCOptimizationDetails

                              func GCOptimizationDetails(ctx context.Context, snapshot Snapshot, pkgDir span.URI) (map[VersionedFileIdentity][]*Diagnostic, error)

                              func GetParsedFile

                              func GetParsedFile(ctx context.Context, snapshot Snapshot, fh FileHandle, pkgPolicy PackageFilter) (Package, *ParsedGoFile, error)

                                GetParsedFile is a convenience function that extracts the Package and ParsedGoFile for a file in a Snapshot. pkgPolicy is one of NarrowestPackage/ WidestPackage.

                                func Highlight

                                func Highlight(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.Range, error)

                                func Hover

                                func Hover(ctx context.Context, snapshot Snapshot, fh FileHandle, position protocol.Position) (*protocol.Hover, error)

                                func Implementation

                                func Implementation(ctx context.Context, snapshot Snapshot, f FileHandle, pp protocol.Position) ([]protocol.Location, error)

                                func ImportPath

                                func ImportPath(s *ast.ImportSpec) string

                                  ImportPath returns the unquoted import path of s, or "" if the path is not properly quoted.

                                  func IncomingCalls

                                  func IncomingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyIncomingCall, error)

                                    IncomingCalls returns an array of CallHierarchyIncomingCall for a file and the position within the file.

                                    func IsGenerated

                                    func IsGenerated(ctx context.Context, snapshot Snapshot, uri span.URI) bool

                                    func IsInterface

                                    func IsInterface(T types.Type) bool

                                      IsInterface returns if a types.Type is an interface

                                      func IsNonFatalGoModError

                                      func IsNonFatalGoModError(err error) bool

                                      func IsWorkspaceModuleVersion

                                      func IsWorkspaceModuleVersion(version string) bool

                                      func LensFuncs

                                      func LensFuncs() map[string]LensFunc

                                        LensFuncs returns the supported lensFuncs for Go files.

                                        func MarshalArgs

                                        func MarshalArgs(args ...interface{}) ([]json.RawMessage, error)

                                          MarshalArgs encodes the given arguments to json.RawMessages. This function is used to construct arguments to a protocol.Command.

                                          Example usage:

                                          jsonArgs, err := EncodeArgs(1, "hello", true, StructuredArg{42, 12.6})

                                          func NewBuiltinSignature

                                          func NewBuiltinSignature(ctx context.Context, snapshot Snapshot, name string) (*signature, error)

                                            NewBuiltinSignature returns signature for the builtin object with a given name, if a builtin object with the name exists.

                                            func NewSignature

                                            func NewSignature(ctx context.Context, s Snapshot, pkg Package, sig *types.Signature, comment *ast.CommentGroup, qf types.Qualifier) *signature

                                              NewSignature returns formatted signature for a types.Signature struct.

                                              func NodeContains

                                              func NodeContains(n ast.Node, pos token.Pos) bool

                                                NodeContains returns true if a node encloses a given position pos.

                                                func OutgoingCalls

                                                func OutgoingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyOutgoingCall, error)

                                                  OutgoingCalls returns an array of CallHierarchyOutgoingCall for a file and the position within the file.

                                                  func PrepareCallHierarchy

                                                  func PrepareCallHierarchy(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyItem, error)

                                                    PrepareCallHierarchy returns an array of CallHierarchyItem for a file and the position within the file.

                                                    func Qualifier

                                                    func Qualifier(f *ast.File, pkg *types.Package, info *types.Info) types.Qualifier

                                                      Qualifier returns a function that appropriately formats a types.PkgName appearing in a *ast.File.

                                                      func Rename

                                                      func Rename(ctx context.Context, s Snapshot, f FileHandle, pp protocol.Position, newName string) (map[span.URI][]protocol.TextEdit, error)

                                                        Rename returns a map of TextEdits for each file modified when renaming a given identifier within a package.

                                                        func SignatureHelp

                                                        func SignatureHelp(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) (*protocol.SignatureInformation, int, error)

                                                        func SortDiagnostics

                                                        func SortDiagnostics(d []*Diagnostic)

                                                        func TestsAndBenchmarks

                                                        func TestsAndBenchmarks(ctx context.Context, snapshot Snapshot, fh FileHandle) (testFns, error)

                                                        func ToProtocolEdits

                                                        func ToProtocolEdits(m *protocol.ColumnMapper, edits []diff.TextEdit) ([]protocol.TextEdit, error)

                                                        func UnmarshalArgs

                                                        func UnmarshalArgs(jsonArgs []json.RawMessage, args ...interface{}) error

                                                          UnmarshalArgs decodes the given json.RawMessages to the variables provided by args. Each element of args should be a pointer.

                                                          Example usage:

                                                          var (
                                                              num int
                                                              str string
                                                              bul bool
                                                              structured StructuredArg
                                                          err := UnmarshalArgs(args, &num, &str, &bul, &structured)

                                                          func WorkspaceModuleVersion

                                                          func WorkspaceModuleVersion(majorVersion string) string

                                                          func WorkspaceSymbols

                                                          func WorkspaceSymbols(ctx context.Context, matcherType SymbolMatcher, style SymbolStyle, views []View, query string) ([]protocol.SymbolInformation, error)

                                                            WorkspaceSymbols matches symbols across views using the given query, according to the SymbolMatcher matcher.

                                                            The workspace symbol method is defined in the spec as follows:

                                                            > The workspace symbol request is sent from the client to the server to
                                                            > list project-wide symbols matching the query string.

                                                            It is unclear what "project-wide" means here, but given the parameters of workspace/symbol do not include any workspace identifier, then it has to be assumed that "project-wide" means "across all workspaces". Hence why WorkspaceSymbols receives the views []View.

                                                            However, it then becomes unclear what it would mean to call WorkspaceSymbols with a different configured SymbolMatcher per View. Therefore we assume that Session level configuration will define the SymbolMatcher to be used for the WorkspaceSymbols method.


                                                            type APIJSON

                                                            type APIJSON struct {
                                                            	Options  map[string][]*OptionJSON
                                                            	Commands []*CommandJSON
                                                            	Lenses   []*LensJSON

                                                            type Analyzer

                                                            type Analyzer struct {
                                                            	Analyzer *analysis.Analyzer
                                                            	// Enabled reports whether the analyzer is enabled. This value can be
                                                            	// configured per-analysis in user settings. For staticcheck analyzers,
                                                            	// the value of the Staticcheck setting overrides this field.
                                                            	Enabled bool
                                                            	// Command is the name of the command used to invoke the suggested fixes
                                                            	// for the analyzer. It is non-nil if we expect this analyzer to provide
                                                            	// its fix separately from its diagnostics. That is, we should apply the
                                                            	// analyzer's suggested fixes through a Command, not a TextEdit.
                                                            	Command *Command
                                                            	// If this is true, then we can apply the suggested fixes
                                                            	// as part of a source.FixAll codeaction.
                                                            	HighConfidence bool
                                                            	// FixesError is only set for type-error analyzers.
                                                            	// It reports true if the message provided indicates an error that could be
                                                            	// fixed by the analyzer.
                                                            	FixesError func(msg string) bool

                                                              Analyzer represents a go/analysis analyzer with some boolean properties that let the user know how to use the analyzer.

                                                              func EnabledAnalyzers

                                                              func EnabledAnalyzers(snapshot Snapshot) (analyzers []Analyzer)

                                                                EnabledAnalyzers returns all of the analyzers enabled for the given snapshot.

                                                                func (Analyzer) IsEnabled

                                                                func (a Analyzer) IsEnabled(view View) bool

                                                                type AppliesFunc

                                                                type AppliesFunc func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, pkg *types.Package, info *types.Info) bool

                                                                type BuiltinPackage

                                                                type BuiltinPackage struct {
                                                                	Package    *ast.Package
                                                                	ParsedFile *ParsedGoFile

                                                                type ClientOptions

                                                                type ClientOptions struct {
                                                                	InsertTextFormat                  protocol.InsertTextFormat
                                                                	ConfigurationSupported            bool
                                                                	DynamicConfigurationSupported     bool
                                                                	DynamicWatchedFilesSupported      bool
                                                                	PreferredContentFormat            protocol.MarkupKind
                                                                	LineFoldingOnly                   bool
                                                                	HierarchicalDocumentSymbolSupport bool
                                                                	SemanticTypes                     []string
                                                                	SemanticMods                      []string

                                                                  ClientOptions holds LSP-specific configuration that is provided by the client.

                                                                  type Command

                                                                  type Command struct {
                                                                  	Title string
                                                                  	Name  string
                                                                  	// Synchronous controls whether the command executes synchronously within the
                                                                  	// ExecuteCommand request (applying suggested fixes is always synchronous).
                                                                  	Synchronous bool
                                                                  	// contains filtered or unexported fields

                                                                  func (*Command) Applies

                                                                  func (c *Command) Applies(ctx context.Context, snapshot Snapshot, fh FileHandle, pRng protocol.Range) bool

                                                                    Applies reports whether the command c implements a suggested fix that is relevant to the given rng.

                                                                    func (Command) ID

                                                                    func (c Command) ID() string

                                                                      ID adds the CommandPrefix to the command name, in order to avoid collisions with other language servers.

                                                                      func (*Command) IsSuggestedFix

                                                                      func (c *Command) IsSuggestedFix() bool

                                                                        IsSuggestedFix reports whether the given command is intended to work as a suggested fix. Suggested fix commands are intended to return edits which are then applied to the workspace.

                                                                        func (*Command) SuggestedFix

                                                                        func (c *Command) SuggestedFix(ctx context.Context, snapshot Snapshot, fh VersionedFileHandle, pRng protocol.Range) ([]protocol.TextDocumentEdit, error)

                                                                          SuggestedFix applies the command's suggested fix to the given file and range, returning the resulting edits.

                                                                          type CommandJSON

                                                                          type CommandJSON struct {
                                                                          	Command string
                                                                          	Title   string
                                                                          	Doc     string

                                                                          type DebuggingOptions

                                                                          type DebuggingOptions struct {
                                                                          	// VerboseOutput enables additional debug logging.
                                                                          	VerboseOutput bool
                                                                          	// CompletionBudget is the soft latency goal for completion requests. Most
                                                                          	// requests finish in a couple milliseconds, but in some cases deep
                                                                          	// completions can take much longer. As we use up our budget we
                                                                          	// dynamically reduce the search scope to ensure we return timely
                                                                          	// results. Zero means unlimited.
                                                                          	CompletionBudget time.Duration

                                                                            DebuggingOptions should not affect the logical execution of Gopls, but may be altered for debugging purposes.

                                                                            type Declaration

                                                                            type Declaration struct {
                                                                            	MappedRange []MappedRange
                                                                            	// contains filtered or unexported fields

                                                                            type Diagnostic

                                                                            type Diagnostic struct {
                                                                            	Range    protocol.Range
                                                                            	Message  string
                                                                            	Source   string
                                                                            	Severity protocol.DiagnosticSeverity
                                                                            	Tags     []protocol.DiagnosticTag
                                                                            	Related []RelatedInformation

                                                                            type EnumValue

                                                                            type EnumValue struct {
                                                                            	Value string
                                                                            	Doc   string

                                                                            type Error

                                                                            type Error struct {
                                                                            	URI            span.URI
                                                                            	Range          protocol.Range
                                                                            	Kind           ErrorKind
                                                                            	Message        string
                                                                            	Category       string // only used by analysis errors so far
                                                                            	SuggestedFixes []SuggestedFix
                                                                            	Related        []RelatedInformation

                                                                            func (*Error) Error

                                                                            func (e *Error) Error() string

                                                                            type ErrorKind

                                                                            type ErrorKind int

                                                                            type ErrorList

                                                                            type ErrorList []*Error

                                                                            func (*ErrorList) Error

                                                                            func (err *ErrorList) Error() string

                                                                            type ExperimentalOptions

                                                                            type ExperimentalOptions struct {
                                                                            	// Analyses specify analyses that the user would like to enable or disable.
                                                                            	// A map of the names of analysis passes that should be enabled/disabled.
                                                                            	// A full list of analyzers that gopls uses can be found [here](
                                                                            	// Example Usage:
                                                                            	// “`json5
                                                                            	// ...
                                                                            	// "analyses": {
                                                                            	//   "unreachable": false, // Disable the unreachable analyzer.
                                                                            	//   "unusedparams": true  // Enable the unusedparams analyzer.
                                                                            	// }
                                                                            	// ...
                                                                            	// “`
                                                                            	Analyses map[string]bool
                                                                            	// Codelens overrides the enabled/disabled state of code lenses. See the "Code Lenses"
                                                                            	// section of for the list of supported lenses.
                                                                            	// Example Usage:
                                                                            	// “`json5
                                                                            	// "gopls": {
                                                                            	// ...
                                                                            	//   "codelens": {
                                                                            	//     "generate": false,  // Don't show the `go generate` lens.
                                                                            	//     "gc_details": true  // Show a code lens toggling the display of gc's choices.
                                                                            	//   }
                                                                            	// ...
                                                                            	// }
                                                                            	// “`
                                                                            	Codelens map[string]bool
                                                                            	// CompletionDocumentation enables documentation with completion results.
                                                                            	CompletionDocumentation bool
                                                                            	// CompleteUnimported enables completion for packages that you do not currently import.
                                                                            	CompleteUnimported bool
                                                                            	// DeepCompletion enables the ability to return completions from deep inside relevant entities, rather than just the locally accessible ones.
                                                                            	// Consider this example:
                                                                            	// “`go
                                                                            	// package main
                                                                            	// import "fmt"
                                                                            	// type wrapString struct {
                                                                            	//     str string
                                                                            	// }
                                                                            	// func main() {
                                                                            	//     x := wrapString{"hello world"}
                                                                            	//     fmt.Printf(<>)
                                                                            	// }
                                                                            	// “`
                                                                            	// At the location of the `<>` in this program, deep completion would suggest the result `x.str`.
                                                                            	DeepCompletion bool
                                                                            	// Matcher sets the algorithm that is used when calculating completion candidates.
                                                                            	Matcher Matcher
                                                                            	// Annotations suppress various kinds of optimization diagnostics
                                                                            	// that would be reported by the gc_details command.
                                                                            	//  * noNilcheck suppresses display of nilchecks.
                                                                            	//  * noEscape suppresses escape choices.
                                                                            	//  * noInline suppresses inlining choices.
                                                                            	//  * noBounds suppresses bounds checking diagnostics.
                                                                            	Annotations map[string]bool
                                                                            	// Staticcheck enables additional analyses from
                                                                            	Staticcheck bool
                                                                            	// SymbolMatcher sets the algorithm that is used when finding workspace symbols.
                                                                            	SymbolMatcher SymbolMatcher
                                                                            	// SymbolStyle controls how symbols are qualified in symbol responses.
                                                                            	// Example Usage:
                                                                            	// “`json5
                                                                            	// "gopls": {
                                                                            	// ...
                                                                            	//   "symbolStyle": "dynamic",
                                                                            	// ...
                                                                            	// }
                                                                            	// “`
                                                                            	SymbolStyle SymbolStyle
                                                                            	// LinksInHover toggles the presence of links to documentation in hover.
                                                                            	LinksInHover bool
                                                                            	// TempModfile controls the use of the -modfile flag in Go 1.14.
                                                                            	TempModfile bool
                                                                            	// ImportShortcut specifies whether import statements should link to
                                                                            	// documentation or go to definitions.
                                                                            	ImportShortcut ImportShortcut
                                                                            	// VerboseWorkDoneProgress controls whether the LSP server should send
                                                                            	// progress reports for all work done outside the scope of an RPC.
                                                                            	VerboseWorkDoneProgress bool
                                                                            	// SemanticTokens controls whether the LSP server will send
                                                                            	// semantic tokens to the client.
                                                                            	SemanticTokens bool
                                                                            	// ExpandWorkspaceToModule instructs `gopls` to expand the scope of the workspace to include the
                                                                            	// modules containing the workspace folders. Set this to false to avoid loading
                                                                            	// your entire module. This is particularly useful for those working in a monorepo.
                                                                            	ExpandWorkspaceToModule bool
                                                                            	// ExperimentalWorkspaceModule opts a user into the experimental support
                                                                            	// for multi-module workspaces.
                                                                            	ExperimentalWorkspaceModule bool
                                                                            	// ExperimentalDiagnosticsDelay controls the amount of time that gopls waits
                                                                            	// after the most recent file modification before computing deep diagnostics.
                                                                            	// Simple diagnostics (parsing and type-checking) are always run immediately
                                                                            	// on recently modified packages.
                                                                            	// This option must be set to a valid duration string, for example `"250ms"`.
                                                                            	ExperimentalDiagnosticsDelay time.Duration
                                                                            	// ExperimentalPackageCacheKey controls whether to use a coarser cache key
                                                                            	// for package type information to increase cache hits. This setting removes
                                                                            	// the user's environment, build flags, and working directory from the cache
                                                                            	// key, which should be a safe change as all relevant inputs into the type
                                                                            	// checking pass are already hashed into the key. This is temporarily guarded
                                                                            	// by an experiment because caching behavior is subtle and difficult to
                                                                            	// comprehensively test.
                                                                            	ExperimentalPackageCacheKey bool

                                                                              ExperimentalOptions defines configuration for features under active development. WARNING: This configuration will be changed in the future. It only exists while these features are under development.

                                                                              type FileAction

                                                                              type FileAction int

                                                                              func (FileAction) String

                                                                              func (a FileAction) String() string

                                                                              type FileHandle

                                                                              type FileHandle interface {
                                                                              	URI() span.URI
                                                                              	Kind() FileKind
                                                                              	// FileIdentity returns a FileIdentity for the file, even if there was an
                                                                              	// error reading it.
                                                                              	FileIdentity() FileIdentity
                                                                              	// Read reads the contents of a file.
                                                                              	// If the file is not available, returns a nil slice and an error.
                                                                              	Read() ([]byte, error)

                                                                                FileHandle represents a handle to a specific version of a single file.

                                                                                type FileIdentity

                                                                                type FileIdentity struct {
                                                                                	URI span.URI
                                                                                	// Identifier represents a unique identifier for the file's content.
                                                                                	Hash string
                                                                                	// Kind is the file's kind.
                                                                                	Kind FileKind

                                                                                  FileIdentity uniquely identifies a file at a version from a FileSystem.

                                                                                  func (FileIdentity) String

                                                                                  func (id FileIdentity) String() string

                                                                                  type FileKind

                                                                                  type FileKind int

                                                                                    FileKind describes the kind of the file in question. It can be one of Go, mod, or sum.

                                                                                    func DetectLanguage

                                                                                    func DetectLanguage(langID, filename string) FileKind

                                                                                    func (FileKind) String

                                                                                    func (k FileKind) String() string

                                                                                    type FileModification

                                                                                    type FileModification struct {
                                                                                    	URI    span.URI
                                                                                    	Action FileAction
                                                                                    	// OnDisk is true if a watched file is changed on disk.
                                                                                    	// If true, Version will be -1 and Text will be nil.
                                                                                    	OnDisk bool
                                                                                    	// Version will be -1 and Text will be nil when they are not supplied,
                                                                                    	// specifically on textDocument/didClose and for on-disk changes.
                                                                                    	Version float64
                                                                                    	Text    []byte
                                                                                    	// LanguageID is only sent from the language client on textDocument/didOpen.
                                                                                    	LanguageID string

                                                                                      FileModification represents a modification to a file.

                                                                                      type FileSource

                                                                                      type FileSource interface {
                                                                                      	// GetFile returns the FileHandle for a given URI.
                                                                                      	GetFile(ctx context.Context, uri span.URI) (FileHandle, error)

                                                                                        A FileSource maps uris to FileHandles. This abstraction exists both for testability, and so that algorithms can be run equally on session and snapshot files.

                                                                                        type FoldingRangeInfo

                                                                                        type FoldingRangeInfo struct {
                                                                                        	Kind protocol.FoldingRangeKind

                                                                                          FoldingRangeInfo holds range and kind info of folding for an ast.Node

                                                                                          func FoldingRange

                                                                                          func FoldingRange(ctx context.Context, snapshot Snapshot, fh FileHandle, lineFoldingOnly bool) (ranges []*FoldingRangeInfo, err error)

                                                                                            FoldingRange gets all of the folding range for f.

                                                                                            type Hooks

                                                                                            type Hooks struct {
                                                                                            	GoDiff               bool
                                                                                            	ComputeEdits         diff.ComputeEdits
                                                                                            	URLRegexp            *regexp.Regexp
                                                                                            	GofumptFormat        func(ctx context.Context, src []byte) ([]byte, error)
                                                                                            	DefaultAnalyzers     map[string]Analyzer
                                                                                            	TypeErrorAnalyzers   map[string]Analyzer
                                                                                            	ConvenienceAnalyzers map[string]Analyzer
                                                                                            	StaticcheckAnalyzers map[string]Analyzer

                                                                                              Hooks contains configuration that is provided to the Gopls command by the main package.

                                                                                              type HoverInformation

                                                                                              type HoverInformation struct {
                                                                                              	// Signature is the symbol's signature.
                                                                                              	Signature string `json:"signature"`
                                                                                              	// SingleLine is a single line describing the symbol.
                                                                                              	// This is recommended only for use in clients that show a single line for hover.
                                                                                              	SingleLine string `json:"singleLine"`
                                                                                              	// Synopsis is a single sentence synopsis of the symbol's documentation.
                                                                                              	Synopsis string `json:"synopsis"`
                                                                                              	// FullDocumentation is the symbol's full documentation.
                                                                                              	FullDocumentation string `json:"fullDocumentation"`
                                                                                              	// ImportPath is the import path for the package containing the given symbol.
                                                                                              	ImportPath string
                                                                                              	// Link is the anchor for the given symbol.
                                                                                              	// For example, "go/ast#Node".
                                                                                              	Link string `json:"link"`
                                                                                              	// SymbolName is the types.Object.Name for the given symbol.
                                                                                              	SymbolName string
                                                                                              	// contains filtered or unexported fields

                                                                                              func HoverIdentifier

                                                                                              func HoverIdentifier(ctx context.Context, i *IdentifierInfo) (*HoverInformation, error)

                                                                                              func HoverInfo

                                                                                              func HoverInfo(ctx context.Context, pkg Package, obj types.Object, node ast.Node) (*HoverInformation, error)

                                                                                                HoverInfo returns a HoverInformation struct for an ast node and its type object.

                                                                                                type HoverKind

                                                                                                type HoverKind string
                                                                                                const (
                                                                                                	SingleLine            HoverKind = "SingleLine"
                                                                                                	NoDocumentation       HoverKind = "NoDocumentation"
                                                                                                	SynopsisDocumentation HoverKind = "SynopsisDocumentation"
                                                                                                	FullDocumentation     HoverKind = "FullDocumentation"
                                                                                                	// Structured is an experimental setting that returns a structured hover format.
                                                                                                	// This format separates the signature from the documentation, so that the client
                                                                                                	// can do more manipulation of these fields.
                                                                                                	// This should only be used by clients that support this behavior.
                                                                                                	Structured HoverKind = "Structured"

                                                                                                type IdentifierInfo

                                                                                                type IdentifierInfo struct {
                                                                                                	Name     string
                                                                                                	Snapshot Snapshot
                                                                                                	Type struct {
                                                                                                		Object types.Object
                                                                                                	Declaration Declaration
                                                                                                	// contains filtered or unexported fields

                                                                                                  IdentifierInfo holds information about an identifier in Go source.

                                                                                                  func Identifier

                                                                                                  func Identifier(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) (*IdentifierInfo, error)

                                                                                                    Identifier returns identifier information for a position in a file, accounting for a potentially incomplete selector.

                                                                                                    type ImportFix

                                                                                                    type ImportFix struct {
                                                                                                    	Fix   *imports.ImportFix
                                                                                                    	Edits []protocol.TextEdit

                                                                                                    func AllImportsFixes

                                                                                                    func AllImportsFixes(ctx context.Context, snapshot Snapshot, fh FileHandle) (allFixEdits []protocol.TextEdit, editsPerFix []*ImportFix, err error)

                                                                                                      AllImportsFixes formats f for each possible fix to the imports. In addition to returning the result of applying all edits, it returns a list of fixes that could be applied to the file, with the corresponding TextEdits that would be needed to apply that fix.

                                                                                                      type ImportShortcut

                                                                                                      type ImportShortcut string
                                                                                                      const (
                                                                                                      	Both       ImportShortcut = "Both"
                                                                                                      	Link       ImportShortcut = "Link"
                                                                                                      	Definition ImportShortcut = "Definition"

                                                                                                      func (ImportShortcut) ShowDefinition

                                                                                                      func (s ImportShortcut) ShowDefinition() bool
                                                                                                      func (s ImportShortcut) ShowLinks() bool

                                                                                                      type InternalOptions

                                                                                                      type InternalOptions struct {
                                                                                                      	// LiteralCompletions controls whether literal candidates such as
                                                                                                      	// "&someStruct{}" are offered. Tests disable this flag to simplify
                                                                                                      	// their expected values.
                                                                                                      	LiteralCompletions bool

                                                                                                        InternalOptions contains settings that are not exposed to the user for various reasons, e.g. settings used by tests.

                                                                                                        type LensFunc

                                                                                                        type LensJSON

                                                                                                        type LensJSON struct {
                                                                                                        	Lens  string
                                                                                                        	Title string
                                                                                                        	Doc   string

                                                                                                        type LinkTarget

                                                                                                        type LinkTarget string

                                                                                                        type MappedRange

                                                                                                        type MappedRange struct {
                                                                                                        	// contains filtered or unexported fields

                                                                                                          MappedRange provides mapped protocol.Range for a span.Range, accounting for UTF-16 code points.

                                                                                                          func NewMappedRange

                                                                                                          func NewMappedRange(fset *token.FileSet, m *protocol.ColumnMapper, start, end token.Pos) MappedRange

                                                                                                            NewMappedRange returns a MappedRange for the given start and end token.Pos.

                                                                                                            func (MappedRange) Range

                                                                                                            func (s MappedRange) Range() (protocol.Range, error)

                                                                                                            func (MappedRange) Span

                                                                                                            func (s MappedRange) Span() (span.Span, error)

                                                                                                            func (MappedRange) SpanRange

                                                                                                            func (s MappedRange) SpanRange() span.Range

                                                                                                            func (MappedRange) URI

                                                                                                            func (s MappedRange) URI() span.URI

                                                                                                            type Matcher

                                                                                                            type Matcher string
                                                                                                            const (
                                                                                                            	Fuzzy           Matcher = "Fuzzy"
                                                                                                            	CaseInsensitive Matcher = "CaseInsensitive"
                                                                                                            	CaseSensitive   Matcher = "CaseSensitive"

                                                                                                            type OptionJSON

                                                                                                            type OptionJSON struct {
                                                                                                            	Name       string
                                                                                                            	Type       string
                                                                                                            	Doc        string
                                                                                                            	EnumValues []EnumValue
                                                                                                            	Default    string

                                                                                                            type OptionResult

                                                                                                            type OptionResult struct {
                                                                                                            	Name  string
                                                                                                            	Value interface{}
                                                                                                            	Error error
                                                                                                            	State       OptionState
                                                                                                            	Replacement string

                                                                                                            type OptionResults

                                                                                                            type OptionResults []OptionResult

                                                                                                            func SetOptions

                                                                                                            func SetOptions(options *Options, opts interface{}) OptionResults

                                                                                                            type OptionState

                                                                                                            type OptionState int

                                                                                                            type Options

                                                                                                              Options holds various configuration that affects Gopls execution, organized by the nature or origin of the settings.

                                                                                                              func DefaultOptions

                                                                                                              func DefaultOptions() *Options

                                                                                                                DefaultOptions is the options that are used for Gopls execution independent of any externally provided configuration (LSP initialization, command invokation, etc.).

                                                                                                                func (*Options) AddStaticcheckAnalyzer

                                                                                                                func (o *Options) AddStaticcheckAnalyzer(a *analysis.Analyzer)

                                                                                                                func (*Options) Clone

                                                                                                                func (o *Options) Clone() *Options

                                                                                                                func (*Options) ForClientCapabilities

                                                                                                                func (o *Options) ForClientCapabilities(caps protocol.ClientCapabilities)

                                                                                                                type Overlay

                                                                                                                type Overlay interface {
                                                                                                                	// Saved returns whether this overlay has been saved to disk.
                                                                                                                	Saved() bool

                                                                                                                  Overlay is the type for a file held in memory on a session.

                                                                                                                  type Package

                                                                                                                  type Package interface {
                                                                                                                  	ID() string
                                                                                                                  	Name() string
                                                                                                                  	PkgPath() string
                                                                                                                  	CompiledGoFiles() []*ParsedGoFile
                                                                                                                  	File(uri span.URI) (*ParsedGoFile, error)
                                                                                                                  	GetSyntax() []*ast.File
                                                                                                                  	GetErrors() []*Error
                                                                                                                  	GetTypes() *types.Package
                                                                                                                  	GetTypesInfo() *types.Info
                                                                                                                  	GetTypesSizes() types.Sizes
                                                                                                                  	IsIllTyped() bool
                                                                                                                  	ForTest() string
                                                                                                                  	GetImport(pkgPath string) (Package, error)
                                                                                                                  	MissingDependencies() []string
                                                                                                                  	Imports() []Package
                                                                                                                  	Version() *module.Version

                                                                                                                    Package represents a Go package that has been type-checked. It maintains only the relevant fields of a *go/packages.Package.

                                                                                                                    type PackageFilter

                                                                                                                    type PackageFilter int

                                                                                                                      PackageFilter sets how a package is filtered out from a set of packages containing a given file.

                                                                                                                      const (
                                                                                                                      	// NarrowestPackage picks the "narrowest" package for a given file.
                                                                                                                      	// By "narrowest" package, we mean the package with the fewest number of
                                                                                                                      	// files that includes the given file. This solves the problem of test
                                                                                                                      	// variants, as the test will have more files than the non-test package.
                                                                                                                      	NarrowestPackage PackageFilter = iota
                                                                                                                      	// WidestPackage returns the Package containing the most files.
                                                                                                                      	// This is useful for something like diagnostics, where we'd prefer to
                                                                                                                      	// offer diagnostics for as many files as possible.

                                                                                                                      type ParseMode

                                                                                                                      type ParseMode int

                                                                                                                        ParseMode controls the content of the AST produced when parsing a source file.

                                                                                                                        const (
                                                                                                                        	// ParseHeader specifies that the main package declaration and imports are needed.
                                                                                                                        	// This is the mode used when attempting to examine the package graph structure.
                                                                                                                        	ParseHeader ParseMode = iota
                                                                                                                        	// ParseExported specifies that the public symbols are needed, but things like
                                                                                                                        	// private symbols and function bodies are not.
                                                                                                                        	// This mode is used for things where a package is being consumed only as a
                                                                                                                        	// dependency.
                                                                                                                        	// ParseFull specifies the full AST is needed.
                                                                                                                        	// This is used for files of direct interest where the entire contents must
                                                                                                                        	// be considered.

                                                                                                                        type ParsedGoFile

                                                                                                                        type ParsedGoFile struct {
                                                                                                                        	URI  span.URI
                                                                                                                        	Mode ParseMode
                                                                                                                        	File *ast.File
                                                                                                                        	Tok  *token.File
                                                                                                                        	// Source code used to build the AST. It may be different from the
                                                                                                                        	// actual content of the file if we have fixed the AST.
                                                                                                                        	Src      []byte
                                                                                                                        	Mapper   *protocol.ColumnMapper
                                                                                                                        	ParseErr error

                                                                                                                          A ParsedGoFile contains the results of parsing a Go file.

                                                                                                                          type ParsedModule

                                                                                                                          type ParsedModule struct {
                                                                                                                          	File        *modfile.File
                                                                                                                          	Mapper      *protocol.ColumnMapper
                                                                                                                          	ParseErrors []Error

                                                                                                                            A ParsedModule contains the results of parsing a go.mod file.

                                                                                                                            type PrepareItem

                                                                                                                            type PrepareItem struct {
                                                                                                                            	Range protocol.Range
                                                                                                                            	Text  string

                                                                                                                            func PrepareRename

                                                                                                                            func PrepareRename(ctx context.Context, snapshot Snapshot, f FileHandle, pp protocol.Position) (*PrepareItem, error)

                                                                                                                            type ReferenceInfo

                                                                                                                            type ReferenceInfo struct {
                                                                                                                            	Name string
                                                                                                                            	// contains filtered or unexported fields

                                                                                                                              ReferenceInfo holds information about reference to an identifier in Go source.

                                                                                                                              func References

                                                                                                                              func References(ctx context.Context, s Snapshot, f FileHandle, pp protocol.Position, includeDeclaration bool) ([]*ReferenceInfo, error)

                                                                                                                                References returns a list of references for a given identifier within the packages containing i.File. Declarations appear first in the result.

                                                                                                                                type RelatedInformation

                                                                                                                                type RelatedInformation struct {
                                                                                                                                	URI     span.URI
                                                                                                                                	Range   protocol.Range
                                                                                                                                	Message string

                                                                                                                                type ServerOptions

                                                                                                                                type ServerOptions struct {
                                                                                                                                	SupportedCodeActions map[FileKind]map[protocol.CodeActionKind]bool
                                                                                                                                	SupportedCommands    []string

                                                                                                                                  ServerOptions holds LSP-specific configuration that is provided by the server.

                                                                                                                                  type Session

                                                                                                                                  type Session interface {
                                                                                                                                  	// NewView creates a new View, returning it and its first snapshot.
                                                                                                                                  	NewView(ctx context.Context, name string, folder span.URI, options *Options) (View, Snapshot, func(), error)
                                                                                                                                  	// Cache returns the cache that created this session, for debugging only.
                                                                                                                                  	Cache() interface{}
                                                                                                                                  	// View returns a view with a matching name, if the session has one.
                                                                                                                                  	View(name string) View
                                                                                                                                  	// ViewOf returns a view corresponding to the given URI.
                                                                                                                                  	ViewOf(uri span.URI) (View, error)
                                                                                                                                  	// Views returns the set of active views built by this session.
                                                                                                                                  	Views() []View
                                                                                                                                  	// Shutdown the session and all views it has created.
                                                                                                                                  	Shutdown(ctx context.Context)
                                                                                                                                  	// GetFile returns a handle for the specified file.
                                                                                                                                  	GetFile(ctx context.Context, uri span.URI) (FileHandle, error)
                                                                                                                                  	// DidModifyFile reports a file modification to the session. It returns the
                                                                                                                                  	// resulting snapshots, a guaranteed one per view.
                                                                                                                                  	DidModifyFiles(ctx context.Context, changes []FileModification) (map[span.URI]View, map[View]Snapshot, []func(), []span.URI, error)
                                                                                                                                  	// Overlays returns a slice of file overlays for the session.
                                                                                                                                  	Overlays() []Overlay
                                                                                                                                  	// Options returns a copy of the SessionOptions for this session.
                                                                                                                                  	Options() *Options
                                                                                                                                  	// SetOptions sets the options of this session to new values.

                                                                                                                                    Session represents a single connection from a client. This is the level at which things like open files are maintained on behalf of the client. A session may have many active views at any given time.

                                                                                                                                    type Snapshot

                                                                                                                                    type Snapshot interface {
                                                                                                                                    	ID() uint64
                                                                                                                                    	// View returns the View associated with this snapshot.
                                                                                                                                    	View() View
                                                                                                                                    	// Fileset returns the Fileset used to parse all the Go files in this snapshot.
                                                                                                                                    	FileSet() *token.FileSet
                                                                                                                                    	// ValidBuildConfiguration returns true if there is some error in the
                                                                                                                                    	// user's workspace. In particular, if they are both outside of a module
                                                                                                                                    	// and their GOPATH.
                                                                                                                                    	ValidBuildConfiguration() bool
                                                                                                                                    	// WriteEnv writes the view-specific environment to the io.Writer.
                                                                                                                                    	WriteEnv(ctx context.Context, w io.Writer) error
                                                                                                                                    	// FindFile returns the FileHandle for the given URI, if it is already
                                                                                                                                    	// in the given snapshot.
                                                                                                                                    	FindFile(uri span.URI) VersionedFileHandle
                                                                                                                                    	// GetVersionedFile returns the VersionedFileHandle for a given URI,
                                                                                                                                    	// initializing it if it is not already part of the snapshot.
                                                                                                                                    	GetVersionedFile(ctx context.Context, uri span.URI) (VersionedFileHandle, error)
                                                                                                                                    	// GetFile returns the FileHandle for a given URI, initializing it if it is
                                                                                                                                    	// not already part of the snapshot.
                                                                                                                                    	GetFile(ctx context.Context, uri span.URI) (FileHandle, error)
                                                                                                                                    	// AwaitInitialized waits until the snapshot's view is initialized.
                                                                                                                                    	AwaitInitialized(ctx context.Context)
                                                                                                                                    	// IsOpen returns whether the editor currently has a file open.
                                                                                                                                    	IsOpen(uri span.URI) bool
                                                                                                                                    	// IgnoredFile reports if a file would be ignored by a `go list` of the whole
                                                                                                                                    	// workspace.
                                                                                                                                    	IgnoredFile(uri span.URI) bool
                                                                                                                                    	// ParseGo returns the parsed AST for the file.
                                                                                                                                    	// If the file is not available, returns nil and an error.
                                                                                                                                    	ParseGo(ctx context.Context, fh FileHandle, mode ParseMode) (*ParsedGoFile, error)
                                                                                                                                    	// PosToField is a cache of *ast.Fields by token.Pos. This allows us
                                                                                                                                    	// to quickly find corresponding *ast.Field node given a *types.Var.
                                                                                                                                    	// We must refer to the AST to render type aliases properly when
                                                                                                                                    	// formatting signatures and other types.
                                                                                                                                    	PosToField(ctx context.Context, pgf *ParsedGoFile) (map[token.Pos]*ast.Field, error)
                                                                                                                                    	// PosToDecl maps certain objects' positions to their surrounding
                                                                                                                                    	// ast.Decl. This mapping is used when building the documentation
                                                                                                                                    	// string for the objects.
                                                                                                                                    	PosToDecl(ctx context.Context, pgf *ParsedGoFile) (map[token.Pos]ast.Decl, error)
                                                                                                                                    	// Analyze runs the analyses for the given package at this snapshot.
                                                                                                                                    	Analyze(ctx context.Context, pkgID string, analyzers ...*analysis.Analyzer) ([]*Error, error)
                                                                                                                                    	// RunGoCommandPiped runs the given `go` command in the view, using the
                                                                                                                                    	// provided stdout and stderr. It will use the -modfile flag, if possible.
                                                                                                                                    	// If the provided working directory is empty, the snapshot's root folder
                                                                                                                                    	// will be used as the working directory.
                                                                                                                                    	RunGoCommandPiped(ctx context.Context, wd, verb string, args []string, stdout, stderr io.Writer) error
                                                                                                                                    	// RunGoCommandDirect runs the given `go` command, never using the
                                                                                                                                    	// -modfile flag. If the provided working directory is empty, the
                                                                                                                                    	// snapshot's root folder will be used as the working directory.
                                                                                                                                    	RunGoCommandDirect(ctx context.Context, wd, verb string, args []string) error
                                                                                                                                    	// RunProcessEnvFunc runs fn with the process env for this snapshot's view.
                                                                                                                                    	// Note: the process env contains cached module and filesystem state.
                                                                                                                                    	RunProcessEnvFunc(ctx context.Context, fn func(*imports.Options) error) error
                                                                                                                                    	// ModFiles are the go.mod files enclosed in the snapshot's view and known
                                                                                                                                    	// to the snapshot.
                                                                                                                                    	ModFiles() []span.URI
                                                                                                                                    	// ParseMod is used to parse go.mod files.
                                                                                                                                    	ParseMod(ctx context.Context, fh FileHandle) (*ParsedModule, error)
                                                                                                                                    	// ModWhy returns the results of `go mod why` for the module specified by
                                                                                                                                    	// the given go.mod file.
                                                                                                                                    	ModWhy(ctx context.Context, fh FileHandle) (map[string]string, error)
                                                                                                                                    	// ModUpgrade returns the possible updates for the module specified by the
                                                                                                                                    	// given go.mod file.
                                                                                                                                    	ModUpgrade(ctx context.Context, fh FileHandle) (map[string]string, error)
                                                                                                                                    	// ModTidy returns the results of `go mod tidy` for the module specified by
                                                                                                                                    	// the given go.mod file.
                                                                                                                                    	ModTidy(ctx context.Context, fh FileHandle) (*TidiedModule, error)
                                                                                                                                    	// GoModForFile returns the URI of the go.mod file for the given URI.
                                                                                                                                    	GoModForFile(ctx context.Context, uri span.URI) span.URI
                                                                                                                                    	// BuildWorkspaceModFile builds the contents of mod file to be used for
                                                                                                                                    	// multi-module workspace.
                                                                                                                                    	BuildWorkspaceModFile(ctx context.Context) (*modfile.File, error)
                                                                                                                                    	// BuiltinPackage returns information about the special builtin package.
                                                                                                                                    	BuiltinPackage(ctx context.Context) (*BuiltinPackage, error)
                                                                                                                                    	// PackagesForFile returns the packages that this file belongs to, checked
                                                                                                                                    	// in mode.
                                                                                                                                    	PackagesForFile(ctx context.Context, uri span.URI, mode TypecheckMode) ([]Package, error)
                                                                                                                                    	// PackageForFile returns a single package that this file belongs to,
                                                                                                                                    	// checked in mode and filtered by the package policy.
                                                                                                                                    	PackageForFile(ctx context.Context, uri span.URI, mode TypecheckMode, selectPackage PackageFilter) (Package, error)
                                                                                                                                    	// GetActiveReverseDeps returns the active files belonging to the reverse
                                                                                                                                    	// dependencies of this file's package, checked in TypecheckWorkspace mode.
                                                                                                                                    	GetReverseDependencies(ctx context.Context, id string) ([]Package, error)
                                                                                                                                    	// CachedImportPaths returns all the imported packages loaded in this
                                                                                                                                    	// snapshot, indexed by their import path and checked in TypecheckWorkspace
                                                                                                                                    	// mode.
                                                                                                                                    	CachedImportPaths(ctx context.Context) (map[string]Package, error)
                                                                                                                                    	// KnownPackages returns all the packages loaded in this snapshot, checked
                                                                                                                                    	// in TypecheckWorkspace mode.
                                                                                                                                    	KnownPackages(ctx context.Context) ([]Package, error)
                                                                                                                                    	// WorkspacePackages returns the snapshot's top-level packages.
                                                                                                                                    	WorkspacePackages(ctx context.Context) ([]Package, error)
                                                                                                                                    	// WorkspaceDirectories returns any directory known by the view. For views
                                                                                                                                    	// within a module, this is the module root and any replace targets.
                                                                                                                                    	WorkspaceDirectories(ctx context.Context) []span.URI

                                                                                                                                      Snapshot represents the current state for the given view.

                                                                                                                                      type SuggestedFix

                                                                                                                                      type SuggestedFix struct {
                                                                                                                                      	Title string
                                                                                                                                      	Edits map[span.URI][]protocol.TextEdit

                                                                                                                                      type SuggestedFixFunc

                                                                                                                                      type SuggestedFixFunc func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, pkg *types.Package, info *types.Info) (*analysis.SuggestedFix, error)

                                                                                                                                        SuggestedFixFunc is a function used to get the suggested fixes for a given gopls command, some of which are provided by go/analysis.Analyzers. Some of the analyzers in internal/lsp/analysis are not efficient enough to include suggested fixes with their diagnostics, so we have to compute them separately. Such analyzers should provide a function with a signature of SuggestedFixFunc.

                                                                                                                                        type SymbolMatcher

                                                                                                                                        type SymbolMatcher string
                                                                                                                                        const (
                                                                                                                                        	SymbolFuzzy           SymbolMatcher = "Fuzzy"
                                                                                                                                        	SymbolCaseInsensitive SymbolMatcher = "CaseInsensitive"
                                                                                                                                        	SymbolCaseSensitive   SymbolMatcher = "CaseSensitive"

                                                                                                                                        type SymbolStyle

                                                                                                                                        type SymbolStyle string
                                                                                                                                        const (
                                                                                                                                        	// PackageQualifiedSymbols is package qualified symbols i.e.
                                                                                                                                        	// "pkg.Foo.Field".
                                                                                                                                        	PackageQualifiedSymbols SymbolStyle = "Package"
                                                                                                                                        	// FullyQualifiedSymbols is fully qualified symbols, i.e.
                                                                                                                                        	// "path/to/pkg.Foo.Field".
                                                                                                                                        	FullyQualifiedSymbols SymbolStyle = "Full"
                                                                                                                                        	// DynamicSymbols uses whichever qualifier results in the highest scoring
                                                                                                                                        	// match for the given symbol query. Here a "qualifier" is any "/" or "."
                                                                                                                                        	// delimited suffix of the fully qualified symbol. i.e. "to/pkg.Foo.Field" or
                                                                                                                                        	// just "Foo.Field".
                                                                                                                                        	DynamicSymbols SymbolStyle = "Dynamic"

                                                                                                                                        type TidiedModule

                                                                                                                                        type TidiedModule struct {
                                                                                                                                        	// The parsed module, which is guaranteed to have parsed successfully.
                                                                                                                                        	Parsed *ParsedModule
                                                                                                                                        	// Diagnostics representing changes made by `go mod tidy`.
                                                                                                                                        	Errors []Error
                                                                                                                                        	// The bytes of the go.mod file after it was tidied.
                                                                                                                                        	TidiedContent []byte

                                                                                                                                          A TidiedModule contains the results of running `go mod tidy` on a module.

                                                                                                                                          type TypecheckMode

                                                                                                                                          type TypecheckMode int

                                                                                                                                            TypecheckMode controls what kind of parsing should be done (see ParseMode) while type checking a package.

                                                                                                                                            const (
                                                                                                                                            	// Invalid default value.
                                                                                                                                            	TypecheckUnknown TypecheckMode = iota
                                                                                                                                            	// TypecheckFull means to use ParseFull.
                                                                                                                                            	// TypecheckWorkspace means to use ParseFull for workspace packages, and
                                                                                                                                            	// ParseExported for others.
                                                                                                                                            	// TypecheckAll means ParseFull for workspace packages, and both Full and
                                                                                                                                            	// Exported for others. Only valid for some functions.

                                                                                                                                            type UserOptions

                                                                                                                                            type UserOptions struct {
                                                                                                                                            	// BuildFlags is the set of flags passed on to the build system when invoked.
                                                                                                                                            	// It is applied to queries like `go list`, which is used when discovering files.
                                                                                                                                            	// The most common use is to set `-tags`.
                                                                                                                                            	BuildFlags []string
                                                                                                                                            	// Env adds environment variables to external commands run by `gopls`, most notably `go list`.
                                                                                                                                            	Env map[string]string
                                                                                                                                            	// HoverKind controls the information that appears in the hover text.
                                                                                                                                            	// SingleLine and Structured are intended for use only by authors of editor plugins.
                                                                                                                                            	HoverKind HoverKind
                                                                                                                                            	// Placeholders enables placeholders for function parameters or struct fields in completion responses.
                                                                                                                                            	UsePlaceholders bool
                                                                                                                                            	// LinkTarget controls where documentation links go.
                                                                                                                                            	// It might be one of:
                                                                                                                                            	// * `""`
                                                                                                                                            	// * `""`
                                                                                                                                            	// If company chooses to use its own ``, its address can be used as well.
                                                                                                                                            	LinkTarget string
                                                                                                                                            	// Local is the equivalent of the `goimports -local` flag, which puts imports beginning with this string after 3rd-party packages.
                                                                                                                                            	// It should be the prefix of the import path whose imports should be grouped separately.
                                                                                                                                            	Local string
                                                                                                                                            	// Gofumpt indicates if we should run gofumpt formatting.
                                                                                                                                            	Gofumpt bool

                                                                                                                                              UserOptions holds custom Gopls configuration (not part of the LSP) that is modified by the client.

                                                                                                                                              func (*UserOptions) EnvSlice

                                                                                                                                              func (u *UserOptions) EnvSlice() []string

                                                                                                                                                EnvSlice returns Env as a slice of k=v strings.

                                                                                                                                                func (*UserOptions) SetEnvSlice

                                                                                                                                                func (u *UserOptions) SetEnvSlice(env []string)

                                                                                                                                                  SetEnvSlice sets Env from a slice of k=v strings.

                                                                                                                                                  type VersionedFileHandle

                                                                                                                                                  type VersionedFileHandle interface {
                                                                                                                                                  	Version() float64
                                                                                                                                                  	Session() string
                                                                                                                                                  	// LSPIdentity returns the version identity of a file.
                                                                                                                                                  	VersionedFileIdentity() VersionedFileIdentity

                                                                                                                                                  type VersionedFileIdentity

                                                                                                                                                  type VersionedFileIdentity struct {
                                                                                                                                                  	URI span.URI
                                                                                                                                                  	// SessionID is the ID of the LSP session.
                                                                                                                                                  	SessionID string
                                                                                                                                                  	// Version is the version of the file, as specified by the client. It should
                                                                                                                                                  	// only be set in combination with SessionID.
                                                                                                                                                  	Version float64

                                                                                                                                                  type View

                                                                                                                                                  type View interface {
                                                                                                                                                  	// Name returns the name this view was constructed with.
                                                                                                                                                  	Name() string
                                                                                                                                                  	// Folder returns the folder with which this view was created.
                                                                                                                                                  	Folder() span.URI
                                                                                                                                                  	// BackgroundContext returns a context used for all background processing
                                                                                                                                                  	// on behalf of this view.
                                                                                                                                                  	BackgroundContext() context.Context
                                                                                                                                                  	// Shutdown closes this view, and detaches it from its session.
                                                                                                                                                  	Shutdown(ctx context.Context)
                                                                                                                                                  	// Options returns a copy of the Options for this view.
                                                                                                                                                  	Options() *Options
                                                                                                                                                  	// SetOptions sets the options of this view to new values.
                                                                                                                                                  	// Calling this may cause the view to be invalidated and a replacement view
                                                                                                                                                  	// added to the session. If so the new view will be returned, otherwise the
                                                                                                                                                  	// original one will be.
                                                                                                                                                  	SetOptions(context.Context, *Options) (View, error)
                                                                                                                                                  	// Snapshot returns the current snapshot for the view.
                                                                                                                                                  	Snapshot(ctx context.Context) (Snapshot, func())
                                                                                                                                                  	// Rebuild rebuilds the current view, replacing the original view in its session.
                                                                                                                                                  	Rebuild(ctx context.Context) (Snapshot, func(), error)
                                                                                                                                                  	// IsGoPrivatePath reports whether target is a private import path, as identified
                                                                                                                                                  	// by the GOPRIVATE environment variable.
                                                                                                                                                  	IsGoPrivatePath(path string) bool

                                                                                                                                                    View represents a single workspace. This is the level at which we maintain configuration like working directory and build tags.


                                                                                                                                                    Path Synopsis
                                                                                                                                                    Package completion provides core functionality for code completion in Go editors and tools.
                                                                                                                                                    Package completion provides core functionality for code completion in Go editors and tools.
                                                                                                                                                    Command genapijson generates JSON describing gopls' external-facing API, including user settings and commands.
                                                                                                                                                    Command genapijson generates JSON describing gopls' external-facing API, including user settings and commands.