dstutil

package
v0.27.4 Latest Latest
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 Go to latest Published: Nov 27, 2020 License: BSD-3-Clause, MIT Imports: 5 Imported by: 0

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Index

Constants

View Source 
const (
	ExprTypeIdent        ExprType = "Ident"
	ExprTypeStartExpr             = "StartExpr"
	ExprTypeSelectorExpr          = "SelectorExpr"
)

Variables

This section is empty.

Functions

func Apply 

func Apply(root dst.Node, pre, post ApplyFunc) (result dst.Node)

Apply traverses a syntax tree recursively, starting with root, and calling pre and post for each node as described below. Apply returns the syntax tree, possibly modified.

If pre is not nil, it is called for each node before the node's children are traversed (pre-order). If pre returns false, no children are traversed, and post is not called for that node.

If post is not nil, and a prior call of pre didn't return false, post is called for each node after its children are traversed (post-order). If post returns false, traversal is terminated and Apply returns immediately.

Only fields that refer to AST nodes are considered children; i.e., token.Pos, Scopes, Objects, and fields of basic types (strings, etc.) are ignored.

Children are traversed in the order in which they appear in the respective node's struct definition. A package's files are traversed in the filenames' alphabetical order.

func NewAssignStmt added in v0.27.1 

func NewAssignStmt(lhs, rhs []dst.Expr) *dst.AssignStmt

func NewBasicLit added in v0.27.1 

func NewBasicLit(kind token.Token, value string) *dst.BasicLit

new basicLit

func NewBlockStmt added in v0.27.1 

func NewBlockStmt(expStmt ...*dst.ExprStmt) *dst.BlockStmt

func NewCallExpr added in v0.27.1 

func NewCallExpr(f dst.Expr, args []dst.Expr) *dst.CallExpr

func NewCompositeLit added in v0.27.1 

func NewCompositeLit(typ dst.Expr, elts []dst.Expr) *dst.CompositeLit

new compositeLit

func NewDeclStmt added in v0.27.1 

func NewDeclStmt(decl dst.Decl) *dst.DeclStmt

func NewEmptyStmt added in v0.27.1 

func NewEmptyStmt(pos token.Pos) *dst.EmptyStmt

func NewExpStmt added in v0.27.1 

func NewExpStmt(x dst.Expr) *dst.ExprStmt

func NewField added in v0.27.1 

func NewField(fieldNames []string, typeVal dst.Expr, typeName ExprType, tag *dst.BasicLit) *dst.Field

example ====> 

type svc interface {
  UserGet(ctx context.Context, reqproto *partnerproto.StaffAuthFetchReqProto)(*partnerproto.StaffAuthFetchRespProto, error)
}

====> typeVals: context.Context typeName: StartExpr fieldNames: ctx tag: nil

func NewFieldList added in v0.27.1 

func NewFieldList(fields ...*dst.Field) *dst.FieldList

func NewFieldOfFuncType added in v0.27.1 

func NewFieldOfFuncType(fieldNames []string, functype *dst.FuncType, tag *dst.BasicLit) *dst.Field

func NewFuncDecl added in v0.27.1 

func NewFuncDecl(funcName string, blkStmt *dst.BlockStmt, recv, params *dst.FieldList) *dst.FuncDecl

new funcDecl

func NewFuncType added in v0.27.1 

func NewFuncType(params, results *dst.FieldList) *dst.FuncType
type svc interface {
  UserGet()
}

func NewGenDecl added in v0.27.1 

func NewGenDecl(tok token.Token, specs ...dst.Spec) *dst.GenDecl

new GenDecl

func NewIdent added in v0.27.1 

func NewIdent(name string) *dst.Ident

func NewImportSpec added in v0.27.1 

func NewImportSpec(name string, path string) *dst.ImportSpec

new import spec

func NewInterface added in v0.27.1 

func NewInterface(fieldList *dst.FieldList) *dst.InterfaceType

func NewKeyValueExp added in v0.27.1 

func NewKeyValueExp(key, val dst.Expr) *dst.KeyValueExpr

func NewReturnStmt added in v0.27.1 

func NewReturnStmt(results []dst.Expr) *dst.ReturnStmt

func NewSelectExp added in v0.27.1 

func NewSelectExp(x dst.Expr, sel *dst.Ident) *dst.SelectorExpr

func NewShortAssignStmt added in v0.27.1 

func NewShortAssignStmt(lhs, rhs []dst.Expr) *dst.AssignStmt

func NewStarExp added in v0.27.1 

func NewStarExp(exp dst.Expr) *dst.StarExpr

func NewValSpec added in v0.27.2 

func NewValSpec(name, typ string) *dst.ValueSpec

func NewValueSpec added in v0.27.1 

func NewValueSpec(ident string, expr dst.Expr) *dst.ValueSpec

new valueSpec

func NewVarDecl added in v0.27.2 

func NewVarDecl(name, typ string) *dst.GenDecl

func Unparen 

func Unparen(e dst.Expr) dst.Expr

Unparen returns e with any enclosing parentheses stripped.

Types

type ApplyFunc 

type ApplyFunc func(*Cursor) bool

An ApplyFunc is invoked by Apply for each node n, even if n is nil, before and/or after the node's children, using a Cursor describing the current node and providing operations on it.

The return value of ApplyFunc controls the syntax tree traversal. See Apply for details.

type Cursor 

type Cursor struct {
	// contains filtered or unexported fields
}

A Cursor describes a node encountered during Apply. Information about the node and its parent is available from the Node, Parent, Name, and Index methods.

If p is a variable of type and value of the current parent node c.Parent(), and f is the field identifier with name c.Name(), the following invariants hold: 

p.f            == c.Node()  if c.Index() <  0
p.f[c.Index()] == c.Node()  if c.Index() >= 0

The methods Replace, Delete, InsertBefore, and InsertAfter can be used to change the AST without disrupting Apply.

func (*Cursor) Delete 

func (c *Cursor) Delete()

Delete deletes the current Node from its containing slice. If the current Node is not part of a slice, Delete panics. As a special case, if the current node is a package file, Delete removes it from the package's Files map.

func (*Cursor) Index 

func (c *Cursor) Index() int

Index reports the index >= 0 of the current Node in the slice of Nodes that contains it, or a value < 0 if the current Node is not part of a slice. The index of the current node changes if InsertBefore is called while processing the current node.

func (*Cursor) InsertAfter 

func (c *Cursor) InsertAfter(n dst.Node)

InsertAfter inserts n after the current Node in its containing slice. If the current Node is not part of a slice, InsertAfter panics. Apply does not walk n.

func (*Cursor) InsertBefore 

func (c *Cursor) InsertBefore(n dst.Node)

InsertBefore inserts n before the current Node in its containing slice. If the current Node is not part of a slice, InsertBefore panics. Apply will not walk n.

func (*Cursor) Name 

func (c *Cursor) Name() string

Name returns the name of the parent Node field that contains the current Node. If the parent is a *dst.Package and the current Node is a *dst.File, Name returns the filename for the current Node.

func (*Cursor) Node 

func (c *Cursor) Node() dst.Node

Node returns the current Node.

func (*Cursor) Parent 

func (c *Cursor) Parent() dst.Node

Parent returns the parent of the current Node.

func (*Cursor) Replace 

func (c *Cursor) Replace(n dst.Node)

Replace replaces the current Node with n. The replacement node is not walked by Apply.

func (*Cursor) Similarity added in v0.27.0 

func (c *Cursor) Similarity(n dst.Node) (int, int)

Similarity returns similarity between the current Node and node n.

type DecorationPoint added in v0.26.3 

type DecorationPoint struct {
	Name string
	Decs []string
}

DecorationPoint contains the name of the decoration attachment point and a list of decorations attached there

func Decorations added in v0.26.3 

func Decorations(n dst.Node) (before, after dst.SpaceType, info []DecorationPoint)

Decorations returns information about all the decoration attachment points associated with a node

type ExprType added in v0.27.1 

type ExprType string

Source Files

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