ast

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v1.3.5 Latest Latest
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Published: Feb 27, 2019 License: MIT Imports: 4 Imported by: 0

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Constants

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Variables

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Functions

This section is empty.

Types

type ArrayLiteral

type ArrayLiteral struct {
	Token    token.Token // the '[' token
	Elements []Expression
}

ArrayLiteral represents the array literal and holds a list of expressions

func (*ArrayLiteral) String

func (al *ArrayLiteral) String() string

String returns a stringified version of the AST for debugging

func (*ArrayLiteral) TokenLiteral

func (al *ArrayLiteral) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type AssignmentExpression

type AssignmentExpression struct {
	Token token.Token // The = token
	Left  Expression
	Value Expression
}

AssignmentExpression represents an assignment expression of the form: x = 1 or xs[1] = 2

func (*AssignmentExpression) String

func (ae *AssignmentExpression) String() string

String returns a stringified version of the AST for debugging

func (*AssignmentExpression) TokenLiteral

func (ae *AssignmentExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type BindExpression

type BindExpression struct {
	Token token.Token // The := token
	Left  Expression
	Value Expression
}

BindExpression represents a binding expression of the form: x := 1

func (*BindExpression) String

func (be *BindExpression) String() string

String returns a stringified version of the AST for debugging

func (*BindExpression) TokenLiteral

func (be *BindExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type BlockStatement

type BlockStatement struct {
	Token      token.Token // the { token
	Statements []Statement
}

BlockStatement represents a block statement and holds one or more other statements

func (*BlockStatement) String

func (bs *BlockStatement) String() string

String returns a stringified version of the AST for debugging

func (*BlockStatement) TokenLiteral

func (bs *BlockStatement) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Boolean

type Boolean struct {
	Token token.Token
	Value bool
}

Boolean represents a boolean value and holds the underlying boolean value

func (*Boolean) String

func (b *Boolean) String() string

String returns a stringified version of the AST for debugging

func (*Boolean) TokenLiteral

func (b *Boolean) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type CallExpression

type CallExpression struct {
	Token     token.Token // The '(' token
	Function  Expression  // Identifier or FunctionLiteral
	Arguments []Expression
}

CallExpression represents a call expression and holds the function to be called as well as the arguments to be passed to that function

func (*CallExpression) String

func (ce *CallExpression) String() string

String returns a stringified version of the AST for debugging

func (*CallExpression) TokenLiteral

func (ce *CallExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Comment

type Comment struct {
	Token token.Token // the token.COMMENT token
	Value string
}

Comment a comment

func (*Comment) String

func (c *Comment) String() string

String returns a stringified version of the AST for debugging

func (*Comment) TokenLiteral

func (c *Comment) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Expression

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

Expression defines the interface for all expression nodes.

type ExpressionStatement

type ExpressionStatement struct {
	Token      token.Token // the first token of the expression
	Expression Expression
}

ExpressionStatement represents an expression statement and holds an expression

func (*ExpressionStatement) String

func (es *ExpressionStatement) String() string

String returns a stringified version of the AST for debugging

func (*ExpressionStatement) TokenLiteral

func (es *ExpressionStatement) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type FunctionLiteral

type FunctionLiteral struct {
	Token      token.Token // The 'fn' token
	Name       string
	Parameters []*Identifier
	Body       *BlockStatement
}

FunctionLiteral represents a literal functions and holds the function's formal parameters and boy of the function as a block statement

func (*FunctionLiteral) String

func (fl *FunctionLiteral) String() string

String returns a stringified version of the AST for debugging

func (*FunctionLiteral) TokenLiteral

func (fl *FunctionLiteral) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type HashLiteral

type HashLiteral struct {
	Token token.Token // the '{' token
	Pairs map[Expression]Expression
}

HashLiteral represents a hash map or dictionary literal, a set of key/value pairs.

func (*HashLiteral) String

func (hl *HashLiteral) String() string

String returns a stringified version of the AST for debugging

func (*HashLiteral) TokenLiteral

func (hl *HashLiteral) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Identifier

type Identifier struct {
	Token token.Token // the token.IDENT token
	Value string
}

Identifier represents an identiifer and holds the name of the identifier

func (*Identifier) String

func (i *Identifier) String() string

String returns a stringified version of the AST for debugging

func (*Identifier) TokenLiteral

func (i *Identifier) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type IfExpression

type IfExpression struct {
	Token       token.Token // The 'if' token
	Condition   Expression
	Consequence *BlockStatement
	Alternative *BlockStatement
}

IfExpression represents an `if` expression and holds the condition, consequence and alternative expressions

func (*IfExpression) String

func (ie *IfExpression) String() string

String returns a stringified version of the AST for debugging

func (*IfExpression) TokenLiteral

func (ie *IfExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type ImportExpression added in v1.3.0

type ImportExpression struct {
	Token token.Token // The 'import' token
	Name  Expression
}

ImportExpression represents an `import` expression and holds the name of the module being imported.

func (*ImportExpression) String added in v1.3.0

func (ie *ImportExpression) String() string

String returns a stringified version of the AST for debugging

func (*ImportExpression) TokenLiteral added in v1.3.0

func (ie *ImportExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type IndexExpression

type IndexExpression struct {
	Token token.Token // The [ token
	Left  Expression
	Index Expression
}

IndexExpression represents an index operator expression, e.g: xs[2] and holds the left expression and index expression

func (*IndexExpression) String

func (ie *IndexExpression) String() string

String returns a stringified version of the AST for debugging

func (*IndexExpression) TokenLiteral

func (ie *IndexExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type InfixExpression

type InfixExpression struct {
	Token    token.Token // The operator token, e.g. +
	Left     Expression
	Operator string
	Right    Expression
}

InfixExpression represents an infix expression and holds the left-hand expression, operator and right-hand expression

func (*InfixExpression) String

func (ie *InfixExpression) String() string

String returns a stringified version of the AST for debugging

func (*InfixExpression) TokenLiteral

func (ie *InfixExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type IntegerLiteral

type IntegerLiteral struct {
	Token token.Token
	Value int64
}

IntegerLiteral represents a literal integare and holds an integer value

func (*IntegerLiteral) String

func (il *IntegerLiteral) String() string

String returns a stringified version of the AST for debugging

func (*IntegerLiteral) TokenLiteral

func (il *IntegerLiteral) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Node

type Node interface {
	TokenLiteral() string
	String() string
}

Node defines an interface for all nodes in the AST.

type Null

type Null struct {
	Token token.Token
}

Null represents a null value

func (*Null) String

func (n *Null) String() string

String returns a stringified version of the AST for debugging

func (*Null) TokenLiteral

func (n *Null) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type PrefixExpression

type PrefixExpression struct {
	Token    token.Token // The prefix token, e.g. !
	Operator string
	Right    Expression
}

PrefixExpression represents a prefix expression and holds the operator as well as the right-hand side expression

func (*PrefixExpression) String

func (pe *PrefixExpression) String() string

String returns a stringified version of the AST for debugging

func (*PrefixExpression) TokenLiteral

func (pe *PrefixExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Program

type Program struct {
	Statements []Statement
}

Program is the root node. All programs consist of a slice of Statement(s)

func (*Program) String

func (p *Program) String() string

String returns a stringified version of the AST for debugging

func (*Program) TokenLiteral

func (p *Program) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type ReturnStatement

type ReturnStatement struct {
	Token       token.Token // the 'return' token
	ReturnValue Expression
}

ReturnStatement represenets the `return` statement node

func (*ReturnStatement) String

func (rs *ReturnStatement) String() string

String returns a stringified version of the AST for debugging

func (*ReturnStatement) TokenLiteral

func (rs *ReturnStatement) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type Statement

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

Statement defines the interface for all statement nodes.

type StringLiteral

type StringLiteral struct {
	Token token.Token
	Value string
}

StringLiteral represents a literal string and holds a string value

func (*StringLiteral) String

func (sl *StringLiteral) String() string

String returns a stringified version of the AST for debugging

func (*StringLiteral) TokenLiteral

func (sl *StringLiteral) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

type WhileExpression

type WhileExpression struct {
	Token       token.Token // The 'while' token
	Condition   Expression
	Consequence *BlockStatement
}

WhileExpression represents an `while` expression and holds the condition, and consequence expression

func (*WhileExpression) String

func (we *WhileExpression) String() string

String returns a stringified version of the AST for debugging

func (*WhileExpression) TokenLiteral

func (we *WhileExpression) TokenLiteral() string

TokenLiteral prints the literal value of the token associated with this node

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