ast

package
v0.58.1-0...-af594cf Latest Latest
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 Go to latest Published: May 1, 2020 License: MIT Imports: 12 Imported by: 0

Documentation

Overview

Package ast declares the types used to represent the syntax tree for Flux source code.

Index

Constants

View Source 
const (
	NanosecondUnit  = "ns"
	MicrosecondUnit = "us"
	MillisecondUnit = "ms"
	SecondUnit      = "s"
	MinuteUnit      = "m"
	HourUnit        = "h"
	DayUnit         = "d"
	WeekUnit        = "w"
	MonthUnit       = "mo"
	YearUnit        = "y"
)

Variables

View Source 
var LogicalOperatorTokens = map[LogicalOperatorKind]string{
	AndOperator: "and",
	OrOperator:  "or",
}

LogicalOperatorTokens converts LogicalOperatorKind to string

View Source 
var OperatorTokens = map[OperatorKind]string{
	MultiplicationOperator:   "*",
	DivisionOperator:         "/",
	ModuloOperator:           "%",
	PowerOperator:            "^",
	AdditionOperator:         "+",
	SubtractionOperator:      "-",
	LessThanEqualOperator:    "<=",
	LessThanOperator:         "<",
	GreaterThanOperator:      ">",
	GreaterThanEqualOperator: ">=",
	InOperator:               "in",
	NotOperator:              "not",
	ExistsOperator:           "exists",
	NotEmptyOperator:         "not empty",
	EmptyOperator:            "empty",
	StartsWithOperator:       "startswith",
	EqualOperator:            "==",
	NotEqualOperator:         "!=",
	RegexpMatchOperator:      "=~",
	NotRegexpMatchOperator:   "!~",
}

OperatorTokens converts OperatorKind to string

Functions

func Check 

func Check(root Node) int

Check will inspect each node and annotate it with any AST errors. It will return the number of errors that were found.

func DurationFrom 

func DurationFrom(l *DurationLiteral, _ time.Time) (time.Duration, error)

Duration gives you a DurationLiteral from a time.Duration. Currently this is an approximation, but since we accept time, it can be made exact. TODO: makes this exact and not an approximation. currently the time.Time is ignored

func Format 

func Format(n Node) string

Returns a valid script for a given AST rooted at node `n`. Formatting rules:

  • In a list of statements, if two statements are of a different type (e.g. an `OptionStatement` followed by an `ExpressionStatement`), they are separated by a double newline.
  • In a function call (or object definition), if the arguments (or properties) are more than 3, they are split into multiple lines.

func GetError 

func GetError(n Node) error

GetError will return the first error within an AST.

func GetErrors 

func GetErrors(n Node) (errs []error)

GetErrors will return each of the errors within an AST.

func PrintErrors 

func PrintErrors(w io.Writer, root Node)

PrintErrors will format the errors within the AST and output them to the writer.

func Visit 

func Visit(node Node, f func(Node))

func Walk 

func Walk(v Visitor, node Node)

Walk recursively visits every children of a given `Node` given a `Visitor`. It performs a pre-order visit of the AST (visit parent node, then visit children from left to right). If a call to `Visit` for a node returns a nil visitor, walk stops and doesn't visit the AST rooted at that node, otherwise it uses the returned visitor to continue walking. Once Walk has finished visiting a node (the node itself and its children), it invokes `Done` on the node's visitor. NOTE: `Walk` doesn't visit `nil` nodes.

Types

type ArrayExpression 

type ArrayExpression struct {
	BaseNode
	Elements []Expression `json:"elements"`
}

ArrayExpression is used to create and directly specify the elements of an array object

func (*ArrayExpression) Copy 

func (e *ArrayExpression) Copy() Node

func (ArrayExpression) FromBuf 

func (e ArrayExpression) FromBuf(buf *fbast.ArrayExpression) *ArrayExpression

func (*ArrayExpression) MarshalJSON 

func (e *ArrayExpression) MarshalJSON() ([]byte, error)

func (*ArrayExpression) Type 

func (*ArrayExpression) Type() string

Type is the abstract type

func (*ArrayExpression) UnmarshalJSON 

func (e *ArrayExpression) UnmarshalJSON(data []byte) error

type Assignment 

type Assignment interface {
	Statement
	// contains filtered or unexported methods
}

type BadStatement 

type BadStatement struct {
	BaseNode
	Text string `json:"text"`
}

BadStatement is a placeholder for statements for which no correct statement nodes can be created.

func (*BadStatement) Copy 

func (s *BadStatement) Copy() Node

func (BadStatement) FromBuf 

func (s BadStatement) FromBuf(buf *fbast.BadStatement) *BadStatement

func (*BadStatement) MarshalJSON 

func (s *BadStatement) MarshalJSON() ([]byte, error)

func (*BadStatement) Type 

func (*BadStatement) Type() string

Type is the abstract type.

type BaseNode 

type BaseNode struct {
	Loc    *SourceLocation `json:"location,omitempty"`
	Errors []Error         `json:"errors,omitempty"`
}

BaseNode holds the attributes every expression or statement should have

func (BaseNode) Copy 

func (b BaseNode) Copy() BaseNode

func (BaseNode) Errs 

func (b BaseNode) Errs() []Error

func (*BaseNode) FromBuf 

func (b *BaseNode) FromBuf(buf *fbast.BaseNode)

func (BaseNode) Location 

func (b BaseNode) Location() SourceLocation

Location is the source location of the Node

type BinaryExpression 

type BinaryExpression struct {
	BaseNode
	Operator OperatorKind `json:"operator"`
	Left     Expression   `json:"left"`
	Right    Expression   `json:"right"`
}

BinaryExpression use binary operators act on two operands in an expression. BinaryExpression includes relational and arithmetic operators

func (*BinaryExpression) Copy 

func (e *BinaryExpression) Copy() Node

func (BinaryExpression) FromBuf 

func (e BinaryExpression) FromBuf(buf *fbast.BinaryExpression) *BinaryExpression

func (*BinaryExpression) MarshalJSON 

func (e *BinaryExpression) MarshalJSON() ([]byte, error)

func (*BinaryExpression) Type 

func (*BinaryExpression) Type() string

Type is the abstract type

func (*BinaryExpression) UnmarshalJSON 

func (e *BinaryExpression) UnmarshalJSON(data []byte) error

type Block 

type Block struct {
	BaseNode
	Body []Statement `json:"body"`
}

Block is a set of statements

func (*Block) Copy 

func (s *Block) Copy() Node

func (Block) FromBuf 

func (s Block) FromBuf(buf *fbast.Block) *Block

func (*Block) MarshalJSON 

func (s *Block) MarshalJSON() ([]byte, error)

func (*Block) Type 

func (*Block) Type() string

Type is the abstract type

func (*Block) UnmarshalJSON 

func (s *Block) UnmarshalJSON(data []byte) error

type BooleanLiteral 

type BooleanLiteral struct {
	BaseNode
	Value bool `json:"value"`
}

BooleanLiteral represent boolean values

func (*BooleanLiteral) Copy 

func (l *BooleanLiteral) Copy() Node

func (BooleanLiteral) FromBuf 

func (l BooleanLiteral) FromBuf(buf *fbast.BooleanLiteral) *BooleanLiteral

func (*BooleanLiteral) MarshalJSON 

func (l *BooleanLiteral) MarshalJSON() ([]byte, error)

func (*BooleanLiteral) Type 

func (*BooleanLiteral) Type() string

Type is the abstract type

type BuiltinStatement 

type BuiltinStatement struct {
	BaseNode
	ID *Identifier `json:"id"`
}

BuiltinStatement declares a builtin identifier and its type

func (*BuiltinStatement) Copy 

func (s *BuiltinStatement) Copy() Node

Copy returns a deep copy of an BuiltinStatement Node

func (BuiltinStatement) FromBuf 

func (s BuiltinStatement) FromBuf(buf *fbast.BuiltinStatement) *BuiltinStatement

func (*BuiltinStatement) MarshalJSON 

func (s *BuiltinStatement) MarshalJSON() ([]byte, error)

func (*BuiltinStatement) Type 

func (*BuiltinStatement) Type() string

Type is the abstract type

type CallExpression 

type CallExpression struct {
	BaseNode
	Callee    Expression   `json:"callee"`
	Arguments []Expression `json:"arguments,omitempty"`
}

CallExpression represents a function call

func (*CallExpression) Copy 

func (e *CallExpression) Copy() Node

func (CallExpression) FromBuf 

func (e CallExpression) FromBuf(buf *fbast.CallExpression) *CallExpression

func (*CallExpression) MarshalJSON 

func (e *CallExpression) MarshalJSON() ([]byte, error)

func (*CallExpression) Type 

func (*CallExpression) Type() string

Type is the abstract type

func (*CallExpression) UnmarshalJSON 

func (e *CallExpression) UnmarshalJSON(data []byte) error

type ConditionalExpression 

type ConditionalExpression struct {
	BaseNode
	Test       Expression `json:"test"`
	Consequent Expression `json:"consequent"`
	Alternate  Expression `json:"alternate"`
}

ConditionalExpression selects one of two expressions, `Alternate` or `Consequent` depending on a third, boolean, expression, `Test`.

func (*ConditionalExpression) Copy 

func (e *ConditionalExpression) Copy() Node

func (ConditionalExpression) FromBuf 

func (e ConditionalExpression) FromBuf(buf *fbast.ConditionalExpression) *ConditionalExpression

func (*ConditionalExpression) MarshalJSON 

func (e *ConditionalExpression) MarshalJSON() ([]byte, error)

func (*ConditionalExpression) Type 

func (*ConditionalExpression) Type() string

Type is the abstract type

func (*ConditionalExpression) UnmarshalJSON 

func (e *ConditionalExpression) UnmarshalJSON(data []byte) error

type DateTimeLiteral 

type DateTimeLiteral struct {
	BaseNode
	Value time.Time `json:"value"`
}

DateTimeLiteral represents an instant in time with nanosecond precision using the syntax of golang's RFC3339 Nanosecond variant TODO: this may be better as a class initialization

func (*DateTimeLiteral) Copy 

func (l *DateTimeLiteral) Copy() Node

func (DateTimeLiteral) FromBuf 

func (l DateTimeLiteral) FromBuf(buf *fbast.DateTimeLiteral) *DateTimeLiteral

func (*DateTimeLiteral) MarshalJSON 

func (l *DateTimeLiteral) MarshalJSON() ([]byte, error)

func (*DateTimeLiteral) Type 

func (*DateTimeLiteral) Type() string

Type is the abstract type

type Duration 

type Duration struct {
	Magnitude int64  `json:"magnitude"`
	Unit      string `json:"unit"`
}

Duration is a pair consisting of length of time and the unit of time measured. It is the atomic unit from which all duration literals are composed.

func (Duration) FromBuf 

func (d Duration) FromBuf(buf *fbast.Duration) Duration

type DurationLiteral 

type DurationLiteral struct {
	BaseNode
	Values []Duration `json:"values"`
}

DurationLiteral represents the elapsed time between two instants as an int64 nanosecond count with syntax of golang's time.Duration TODO: this may be better as a class initialization

func (*DurationLiteral) Copy 

func (l *DurationLiteral) Copy() Node

func (DurationLiteral) FromBuf 

func (l DurationLiteral) FromBuf(buf *fbast.DurationLiteral) *DurationLiteral

func (*DurationLiteral) MarshalJSON 

func (l *DurationLiteral) MarshalJSON() ([]byte, error)

func (*DurationLiteral) Type 

func (*DurationLiteral) Type() string

Type is the abstract type

type Error 

type Error struct {
	Msg string `json:"msg"`
}

Error represents an error in the AST construction. The node that this is attached to is not valid.

func (Error) Error 

func (e Error) Error() string

type Expression 

type Expression interface {
	Node
	// contains filtered or unexported methods
}

Expression represents an action that can be performed by InfluxDB that can be evaluated to a value.

type ExpressionStatement 

type ExpressionStatement struct {
	BaseNode
	Expression Expression `json:"expression"`
}

ExpressionStatement may consist of an expression that does not return a value and is executed solely for its side-effects.

func (*ExpressionStatement) Copy 

func (s *ExpressionStatement) Copy() Node

func (ExpressionStatement) FromBuf 

func (s ExpressionStatement) FromBuf(buf *fbast.ExpressionStatement) *ExpressionStatement

func (*ExpressionStatement) MarshalJSON 

func (s *ExpressionStatement) MarshalJSON() ([]byte, error)

func (*ExpressionStatement) Type 

func (*ExpressionStatement) Type() string

Type is the abstract type

func (*ExpressionStatement) UnmarshalJSON 

func (s *ExpressionStatement) UnmarshalJSON(data []byte) error

type File 

type File struct {
	BaseNode
	Name     string               `json:"name,omitempty"` // name of the file
	Metadata string               `json:"metadata,omitempty"`
	Package  *PackageClause       `json:"package"`
	Imports  []*ImportDeclaration `json:"imports"`
	Body     []Statement          `json:"body"`
}

File represents a source from a single file

func (*File) Copy 

func (f *File) Copy() Node

func (File) FromBuf 

func (f File) FromBuf(buf *fbast.File) *File

func (*File) MarshalJSON 

func (f *File) MarshalJSON() ([]byte, error)

func (*File) Type 

func (*File) Type() string

Type is the abstract type

func (*File) UnmarshalJSON 

func (f *File) UnmarshalJSON(data []byte) error

type FloatLiteral 

type FloatLiteral struct {
	BaseNode
	Value float64 `json:"value"`
}

FloatLiteral represent floating point numbers according to the double representations defined by the IEEE-754-1985

func (*FloatLiteral) Copy 

func (l *FloatLiteral) Copy() Node

func (FloatLiteral) FromBuf 

func (l FloatLiteral) FromBuf(buf *fbast.FloatLiteral) *FloatLiteral

func (*FloatLiteral) MarshalJSON 

func (l *FloatLiteral) MarshalJSON() ([]byte, error)

func (*FloatLiteral) Type 

func (*FloatLiteral) Type() string

Type is the abstract type

type FunctionExpression 

type FunctionExpression struct {
	BaseNode
	Params []*Property `json:"params"`
	Body   Node        `json:"body"`
}

func (*FunctionExpression) Copy 

func (e *FunctionExpression) Copy() Node

func (FunctionExpression) FromBuf 

func (e FunctionExpression) FromBuf(buf *fbast.FunctionExpression) *FunctionExpression

func (*FunctionExpression) MarshalJSON 

func (e *FunctionExpression) MarshalJSON() ([]byte, error)

func (*FunctionExpression) Type 

func (*FunctionExpression) Type() string

Type is the abstract type

func (*FunctionExpression) UnmarshalJSON 

func (e *FunctionExpression) UnmarshalJSON(data []byte) error

type Identifier 

type Identifier struct {
	BaseNode
	Name string `json:"name"`
}

Identifier represents a name that identifies a unique Node

func (*Identifier) Copy 

func (i *Identifier) Copy() Node

func (Identifier) FromBuf 

func (i Identifier) FromBuf(buf *fbast.Identifier) *Identifier

func (*Identifier) Key 

func (i *Identifier) Key() string

Identifiers are valid object keys

func (*Identifier) MarshalJSON 

func (i *Identifier) MarshalJSON() ([]byte, error)

func (*Identifier) Type 

func (*Identifier) Type() string

Type is the abstract type

type ImportDeclaration 

type ImportDeclaration struct {
	BaseNode
	As   *Identifier    `json:"as"`
	Path *StringLiteral `json:"path"`
}

ImportDeclaration declares a single import

func (*ImportDeclaration) Copy 

func (d *ImportDeclaration) Copy() Node

func (ImportDeclaration) FromBuf 

func (d ImportDeclaration) FromBuf(buf *fbast.ImportDeclaration) *ImportDeclaration

func (*ImportDeclaration) MarshalJSON 

func (d *ImportDeclaration) MarshalJSON() ([]byte, error)

func (*ImportDeclaration) Type 

func (*ImportDeclaration) Type() string

Type is the abstract type

type IndexExpression 

type IndexExpression struct {
	BaseNode
	Array Expression `json:"array"`
	Index Expression `json:"index"`
}

IndexExpression represents indexing into an array

func (*IndexExpression) Copy 

func (e *IndexExpression) Copy() Node

func (IndexExpression) FromBuf 

func (e IndexExpression) FromBuf(buf *fbast.IndexExpression) *IndexExpression

func (*IndexExpression) MarshalJSON 

func (e *IndexExpression) MarshalJSON() ([]byte, error)

func (*IndexExpression) Type 

func (*IndexExpression) Type() string

func (*IndexExpression) UnmarshalJSON 

func (e *IndexExpression) UnmarshalJSON(data []byte) error

type IntegerLiteral 

type IntegerLiteral struct {
	BaseNode
	Value int64 `json:"value"`
}

IntegerLiteral represent integer numbers.

func (*IntegerLiteral) Copy 

func (l *IntegerLiteral) Copy() Node

func (IntegerLiteral) FromBuf 

func (l IntegerLiteral) FromBuf(buf *fbast.IntegerLiteral) *IntegerLiteral

func (*IntegerLiteral) MarshalJSON 

func (l *IntegerLiteral) MarshalJSON() ([]byte, error)

func (*IntegerLiteral) Type 

func (*IntegerLiteral) Type() string

Type is the abstract type

func (*IntegerLiteral) UnmarshalJSON 

func (l *IntegerLiteral) UnmarshalJSON(data []byte) error

type InterpolatedPart 

type InterpolatedPart struct {
	BaseNode
	Expression Expression `json:"expression"`
}

func (*InterpolatedPart) Copy 

func (p *InterpolatedPart) Copy() Node

func (InterpolatedPart) FromBuf 

func (p InterpolatedPart) FromBuf(buf *fbast.StringExpressionPart) *InterpolatedPart

func (*InterpolatedPart) MarshalJSON 

func (p *InterpolatedPart) MarshalJSON() ([]byte, error)

func (*InterpolatedPart) Type 

func (*InterpolatedPart) Type() string

func (*InterpolatedPart) UnmarshalJSON 

func (p *InterpolatedPart) UnmarshalJSON(data []byte) error

type Literal 

type Literal interface {
	Expression
	// contains filtered or unexported methods
}

Literal is the lexical form for a literal expression which defines boolean, string, integer, number, duration, datetime or field values. Literals must be coerced explicitly.

type LogicalExpression 

type LogicalExpression struct {
	BaseNode
	Operator LogicalOperatorKind `json:"operator"`
	Left     Expression          `json:"left"`
	Right    Expression          `json:"right"`
}

LogicalExpression represent the rule conditions that collectively evaluate to either true or false. `or` expressions compute the disjunction of two boolean expressions and return boolean values. `and“ expressions compute the conjunction of two boolean expressions and return boolean values.

func (*LogicalExpression) Copy 

func (e *LogicalExpression) Copy() Node

func (LogicalExpression) FromBuf 

func (e LogicalExpression) FromBuf(buf *fbast.LogicalExpression) *LogicalExpression

func (*LogicalExpression) MarshalJSON 

func (e *LogicalExpression) MarshalJSON() ([]byte, error)

func (*LogicalExpression) Type 

func (*LogicalExpression) Type() string

Type is the abstract type

func (*LogicalExpression) UnmarshalJSON 

func (e *LogicalExpression) UnmarshalJSON(data []byte) error

type LogicalOperatorKind 

type LogicalOperatorKind int

LogicalOperatorKind are used with boolean (logical) values 

const (
	AndOperator LogicalOperatorKind
	OrOperator
)

func LogicalOperatorLookup 

func LogicalOperatorLookup(op string) LogicalOperatorKind

LogicalOperatorLookup converts the operators to LogicalOperatorKind

func (LogicalOperatorKind) MarshalText 

func (o LogicalOperatorKind) MarshalText() ([]byte, error)

func (LogicalOperatorKind) String 

func (o LogicalOperatorKind) String() string

func (*LogicalOperatorKind) UnmarshalText 

func (o *LogicalOperatorKind) UnmarshalText(data []byte) error

type MemberAssignment 

type MemberAssignment struct {
	BaseNode
	Member *MemberExpression `json:"member"`
	Init   Expression        `json:"init"`
}

func (*MemberAssignment) Copy 

func (a *MemberAssignment) Copy() Node

func (MemberAssignment) FromBuf 

func (a MemberAssignment) FromBuf(buf *fbast.MemberAssignment) *MemberAssignment

func (*MemberAssignment) MarshalJSON 

func (a *MemberAssignment) MarshalJSON() ([]byte, error)

func (*MemberAssignment) Type 

func (*MemberAssignment) Type() string

func (*MemberAssignment) UnmarshalJSON 

func (a *MemberAssignment) UnmarshalJSON(data []byte) error

type MemberExpression 

type MemberExpression struct {
	BaseNode
	Object   Expression  `json:"object"`
	Property PropertyKey `json:"property"`
}

MemberExpression represents calling a property of a CallExpression

func (*MemberExpression) Copy 

func (e *MemberExpression) Copy() Node

func (MemberExpression) FromBuf 

func (e MemberExpression) FromBuf(buf *fbast.MemberExpression) *MemberExpression

func (*MemberExpression) MarshalJSON 

func (e *MemberExpression) MarshalJSON() ([]byte, error)

func (*MemberExpression) Type 

func (*MemberExpression) Type() string

Type is the abstract type

func (*MemberExpression) UnmarshalJSON 

func (e *MemberExpression) UnmarshalJSON(data []byte) error

type Node 

type Node interface {
	Type() string // Type property is a string that contains the variant type of the node
	Location() SourceLocation
	Errs() []Error
	Copy() Node

	// All node must support json marshalling
	json.Marshaler
	// contains filtered or unexported methods
}

Node represents a node in the InfluxDB abstract syntax tree.

func UnmarshalNode 

func UnmarshalNode(data []byte) (Node, error)

type ObjectExpression 

type ObjectExpression struct {
	BaseNode
	With       *Identifier `json:"with,omitempty"`
	Properties []*Property `json:"properties"`
}

ObjectExpression allows the declaration of an anonymous object within a declaration.

func (*ObjectExpression) Copy 

func (e *ObjectExpression) Copy() Node

func (ObjectExpression) FromBuf 

func (e ObjectExpression) FromBuf(buf *fbast.ObjectExpression) *ObjectExpression

func (*ObjectExpression) MarshalJSON 

func (e *ObjectExpression) MarshalJSON() ([]byte, error)

func (*ObjectExpression) Type 

func (*ObjectExpression) Type() string

Type is the abstract type

type OperatorKind 

type OperatorKind int

OperatorKind are Equality and Arithmatic operators. Result of evaluating an equality operator is always of type Boolean based on whether the comparison is true Arithmetic operators take numerical values (either literals or variables) as their operands 

and return a single numerical value.

const (
	MultiplicationOperator OperatorKind
	DivisionOperator
	ModuloOperator
	PowerOperator
	AdditionOperator
	SubtractionOperator
	LessThanEqualOperator
	LessThanOperator
	GreaterThanEqualOperator
	GreaterThanOperator
	StartsWithOperator
	InOperator
	NotOperator
	ExistsOperator
	NotEmptyOperator
	EmptyOperator
	EqualOperator
	NotEqualOperator
	RegexpMatchOperator
	NotRegexpMatchOperator
)

func OperatorLookup 

func OperatorLookup(op string) OperatorKind

OperatorLookup converts the operators to OperatorKind

func (OperatorKind) MarshalText 

func (o OperatorKind) MarshalText() ([]byte, error)

func (OperatorKind) String 

func (o OperatorKind) String() string

func (*OperatorKind) UnmarshalText 

func (o *OperatorKind) UnmarshalText(data []byte) error

type OptionStatement 

type OptionStatement struct {
	BaseNode
	Assignment Assignment `json:"assignment"`
}

OptionStatement syntactically is a single variable declaration

func (*OptionStatement) Copy 

func (s *OptionStatement) Copy() Node

Copy returns a deep copy of an OptionStatement Node

func (OptionStatement) FromBuf 

func (s OptionStatement) FromBuf(buf *fbast.OptionStatement) *OptionStatement

func (*OptionStatement) MarshalJSON 

func (s *OptionStatement) MarshalJSON() ([]byte, error)

func (*OptionStatement) Type 

func (*OptionStatement) Type() string

Type is the abstract type

func (*OptionStatement) UnmarshalJSON 

func (s *OptionStatement) UnmarshalJSON(data []byte) error

type Package 

type Package struct {
	BaseNode
	Path    string  `json:"path,omitempty"`
	Package string  `json:"package"`
	Files   []*File `json:"files"`
}

Package represents a complete package source tree

func DeserializeFromFlatBuffer 

func DeserializeFromFlatBuffer(buf []byte) *Package

DeserializeFromFlatBuffer takes the given byte slice that is an AST flatbuffer and deserializes it to an AST package.

func (*Package) Copy 

func (p *Package) Copy() Node

func (Package) FromBuf 

func (p Package) FromBuf(buf []byte) *Package

func (*Package) MarshalJSON 

func (p *Package) MarshalJSON() ([]byte, error)

func (*Package) Type 

func (*Package) Type() string

Type is the abstract type

type PackageClause 

type PackageClause struct {
	BaseNode
	Name *Identifier `json:"name"`
}

PackageClause defines the current package identifier.

func (*PackageClause) Copy 

func (c *PackageClause) Copy() Node

func (PackageClause) FromBuf 

func (c PackageClause) FromBuf(buf *fbast.PackageClause) *PackageClause

func (*PackageClause) MarshalJSON 

func (c *PackageClause) MarshalJSON() ([]byte, error)

func (*PackageClause) Type 

func (*PackageClause) Type() string

Type is the abstract type

type ParenExpression 

type ParenExpression struct {
	BaseNode
	Expression Expression `json:"expression"`
}

ParenExpression represents an expressions that is wrapped in parentheses in the source code. It has no semantic meaning, rather it only communicates information about the syntax of the source code.

func (*ParenExpression) Copy 

func (e *ParenExpression) Copy() Node

func (ParenExpression) FromBuf 

func (e ParenExpression) FromBuf(buf *fbast.ParenExpression) *ParenExpression

func (*ParenExpression) MarshalJSON 

func (e *ParenExpression) MarshalJSON() ([]byte, error)

func (*ParenExpression) Type 

func (*ParenExpression) Type() string

func (*ParenExpression) UnmarshalJSON 

func (e *ParenExpression) UnmarshalJSON(data []byte) error

type PipeExpression 

type PipeExpression struct {
	BaseNode
	Argument Expression      `json:"argument"`
	Call     *CallExpression `json:"call"`
}

func (*PipeExpression) Copy 

func (e *PipeExpression) Copy() Node

func (PipeExpression) FromBuf 

func (e PipeExpression) FromBuf(buf *fbast.PipeExpression) *PipeExpression

func (*PipeExpression) MarshalJSON 

func (e *PipeExpression) MarshalJSON() ([]byte, error)

func (*PipeExpression) Type 

func (*PipeExpression) Type() string

Type is the abstract type

func (*PipeExpression) UnmarshalJSON 

func (e *PipeExpression) UnmarshalJSON(data []byte) error

type PipeLiteral 

type PipeLiteral struct {
	BaseNode
}

PipeLiteral represents an specialized literal value, indicating the left hand value of a pipe expression.

func (*PipeLiteral) Copy 

func (p *PipeLiteral) Copy() Node

func (PipeLiteral) FromBuf 

func (p PipeLiteral) FromBuf(buf *fbast.PipeLiteral) *PipeLiteral

func (*PipeLiteral) MarshalJSON 

func (p *PipeLiteral) MarshalJSON() ([]byte, error)

func (*PipeLiteral) Type 

func (*PipeLiteral) Type() string

Type is the abstract type

type Position 

type Position struct {
	Line   int `json:"line"`   // Line is the line in the source marked by this position
	Column int `json:"column"` // Column is the column in the source marked by this position
}

Position represents a specific location in the source

func (*Position) FromBuf 

func (p *Position) FromBuf(buf *fbast.Position)

func (Position) IsValid 

func (p Position) IsValid() bool

func (Position) Less 

func (p Position) Less(o Position) bool

func (Position) String 

func (p Position) String() string

type Property 

type Property struct {
	BaseNode
	Key   PropertyKey `json:"key"`
	Value Expression  `json:"value"`
}

Property is the value associated with a key. A property's key can be either an identifier or string literal.

func (*Property) Copy 

func (p *Property) Copy() Node

func (Property) FromBuf 

func (p Property) FromBuf(buf *fbast.Property) *Property

func (*Property) MarshalJSON 

func (p *Property) MarshalJSON() ([]byte, error)

func (*Property) Type 

func (*Property) Type() string

Type is the abstract type

func (*Property) UnmarshalJSON 

func (p *Property) UnmarshalJSON(data []byte) error

type PropertyKey 

type PropertyKey interface {
	Node
	Key() string
}

PropertyKey represents an object key

type RegexpLiteral 

type RegexpLiteral struct {
	BaseNode
	Value *regexp.Regexp `json:"value"`
}

RegexpLiteral expressions begin and end with `/` and are regular expressions with syntax accepted by RE2

func (*RegexpLiteral) Copy 

func (l *RegexpLiteral) Copy() Node

func (RegexpLiteral) FromBuf 

func (l RegexpLiteral) FromBuf(buf *fbast.RegexpLiteral) *RegexpLiteral

func (*RegexpLiteral) MarshalJSON 

func (l *RegexpLiteral) MarshalJSON() ([]byte, error)

func (*RegexpLiteral) Type 

func (*RegexpLiteral) Type() string

Type is the abstract type

func (*RegexpLiteral) UnmarshalJSON 

func (l *RegexpLiteral) UnmarshalJSON(data []byte) error

type ReturnStatement 

type ReturnStatement struct {
	BaseNode
	Argument Expression `json:"argument"`
}

ReturnStatement defines an Expression to return

func (*ReturnStatement) Copy 

func (s *ReturnStatement) Copy() Node

func (ReturnStatement) FromBuf 

func (s ReturnStatement) FromBuf(buf *fbast.ReturnStatement) *ReturnStatement

func (*ReturnStatement) MarshalJSON 

func (s *ReturnStatement) MarshalJSON() ([]byte, error)

func (*ReturnStatement) Type 

func (*ReturnStatement) Type() string

Type is the abstract type

func (*ReturnStatement) UnmarshalJSON 

func (s *ReturnStatement) UnmarshalJSON(data []byte) error

type SourceLocation 

type SourceLocation struct {
	File   string   `json:"file,omitempty"`
	Start  Position `json:"start"`            // Start is the location in the source the node starts
	End    Position `json:"end"`              // End is the location in the source the node ends
	Source string   `json:"source,omitempty"` // Source is optional raw source
}

SourceLocation represents the location of a node in the AST

func (*SourceLocation) Copy 

func (l *SourceLocation) Copy() *SourceLocation

func (SourceLocation) FromBuf 

func (l SourceLocation) FromBuf(buf *fbast.SourceLocation) *SourceLocation

func (SourceLocation) IsValid 

func (l SourceLocation) IsValid() bool

func (SourceLocation) Less 

func (l SourceLocation) Less(o SourceLocation) bool

func (SourceLocation) String 

func (l SourceLocation) String() string

type Statement 

type Statement interface {
	Node
	// contains filtered or unexported methods
}

Statement Perhaps we don't even want statements nor expression statements

type StringExpression 

type StringExpression struct {
	BaseNode

	Parts []StringExpressionPart `json:"parts"`
}

func (*StringExpression) Copy 

func (e *StringExpression) Copy() Node

func (StringExpression) FromBuf 

func (e StringExpression) FromBuf(buf *fbast.StringExpression) *StringExpression

func (*StringExpression) MarshalJSON 

func (e *StringExpression) MarshalJSON() ([]byte, error)

func (*StringExpression) Type 

func (*StringExpression) Type() string

func (*StringExpression) UnmarshalJSON 

func (e *StringExpression) UnmarshalJSON(data []byte) error

type StringExpressionPart 

type StringExpressionPart interface {
	Node
	// contains filtered or unexported methods
}

type StringLiteral 

type StringLiteral struct {
	BaseNode
	// Value is the unescaped value of the string literal
	Value string `json:"value"`
}

StringLiteral expressions begin and end with double quote marks.

func (*StringLiteral) Copy 

func (l *StringLiteral) Copy() Node

func (StringLiteral) FromBuf 

func (l StringLiteral) FromBuf(buf *fbast.StringLiteral) *StringLiteral

func (*StringLiteral) Key 

func (l *StringLiteral) Key() string

StringLiterals are valid object keys

func (*StringLiteral) MarshalJSON 

func (l *StringLiteral) MarshalJSON() ([]byte, error)

func (*StringLiteral) Type 

func (*StringLiteral) Type() string

type TestStatement 

type TestStatement struct {
	BaseNode
	Assignment *VariableAssignment `json:"assignment"`
}

TestStatement declares a Flux test case

func (*TestStatement) Copy 

func (s *TestStatement) Copy() Node

Copy returns a deep copy of a TestStatement Node

func (TestStatement) FromBuf 

func (s TestStatement) FromBuf(buf *fbast.TestStatement) *TestStatement

func (*TestStatement) MarshalJSON 

func (s *TestStatement) MarshalJSON() ([]byte, error)

func (*TestStatement) Type 

func (*TestStatement) Type() string

Type is the abstract type

type TextPart 

type TextPart struct {
	BaseNode
	Value string `json:"value"`
}

func (*TextPart) Copy 

func (p *TextPart) Copy() Node

func (TextPart) FromBuf 

func (p TextPart) FromBuf(buf *fbast.StringExpressionPart) *TextPart

func (*TextPart) MarshalJSON 

func (p *TextPart) MarshalJSON() ([]byte, error)

func (*TextPart) Type 

func (*TextPart) Type() string

func (*TextPart) UnmarshalJSON 

func (p *TextPart) UnmarshalJSON(data []byte) error

type UnaryExpression 

type UnaryExpression struct {
	BaseNode
	Operator OperatorKind `json:"operator"`
	Argument Expression   `json:"argument"`
}

UnaryExpression use operators act on a single operand in an expression.

func (*UnaryExpression) Copy 

func (e *UnaryExpression) Copy() Node

func (UnaryExpression) FromBuf 

func (e UnaryExpression) FromBuf(buf *fbast.UnaryExpression) *UnaryExpression

func (*UnaryExpression) MarshalJSON 

func (e *UnaryExpression) MarshalJSON() ([]byte, error)

func (*UnaryExpression) Type 

func (*UnaryExpression) Type() string

Type is the abstract type

func (*UnaryExpression) UnmarshalJSON 

func (e *UnaryExpression) UnmarshalJSON(data []byte) error

type UnsignedIntegerLiteral 

type UnsignedIntegerLiteral struct {
	BaseNode
	Value uint64 `json:"value"`
}

UnsignedIntegerLiteral represent integer numbers.

func (*UnsignedIntegerLiteral) Copy 

func (l *UnsignedIntegerLiteral) Copy() Node

func (UnsignedIntegerLiteral) FromBuf 

func (l UnsignedIntegerLiteral) FromBuf(buf *fbast.UnsignedIntegerLiteral) *UnsignedIntegerLiteral

func (*UnsignedIntegerLiteral) MarshalJSON 

func (l *UnsignedIntegerLiteral) MarshalJSON() ([]byte, error)

func (*UnsignedIntegerLiteral) Type 

func (*UnsignedIntegerLiteral) Type() string

Type is the abstract type

func (*UnsignedIntegerLiteral) UnmarshalJSON 

func (l *UnsignedIntegerLiteral) UnmarshalJSON(data []byte) error

type VariableAssignment 

type VariableAssignment struct {
	BaseNode
	ID   *Identifier `json:"id"`
	Init Expression  `json:"init"`
}

VariableAssignment represents the declaration of a variable

func (*VariableAssignment) Copy 

func (d *VariableAssignment) Copy() Node

func (VariableAssignment) FromBuf 

func (d VariableAssignment) FromBuf(buf *fbast.VariableAssignment) *VariableAssignment

func (*VariableAssignment) MarshalJSON 

func (d *VariableAssignment) MarshalJSON() ([]byte, error)

func (*VariableAssignment) Type 

func (*VariableAssignment) Type() string

Type is the abstract type

func (*VariableAssignment) UnmarshalJSON 

func (d *VariableAssignment) UnmarshalJSON(data []byte) error

type Visitor 

type Visitor interface {
	Visit(node Node) Visitor
	Done(node Node)
}

Visitor implements the visitor pattern.

When used with the Walk function, Visit will be called for every node in depth-first order. After all children for a Node have been visted, Done is called on that Node to signal that we are done with that Node.

If Visit returns nil, Walk will not recurse on the children. Neither Visit nor Done will be invoked on nil nodes.

func CreateVisitor 

func CreateVisitor(f func(Node)) Visitor

Source Files

View all Source files

Directories

Path Synopsis
Package asttest implements utilities for testing the abstract syntax tree.
 Package asttest implements utilities for testing the abstract syntax tree.
internal
fbast
Package fbast contains code generated by the FlatBuffers compiler for serializing AST.
 Package fbast contains code generated by the FlatBuffers compiler for serializing AST.

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