ast

Documentation

Index

• type Expression
• type ExpressionStatement
  • func (es *ExpressionStatement) String() string
  • func (es *ExpressionStatement) TokenLiteral() string
• type Identifier
  • func (i *Identifier) String() string
  • func (i *Identifier) TokenLiteral() string
• type InfixExpression
  • func (ie *InfixExpression) String() string
  • func (ie *InfixExpression) TokenLiteral() string
• type IntegerLiteral
  • func (il *IntegerLiteral) String() string
  • func (il *IntegerLiteral) TokenLiteral() string
• type LetStatement
  • func (ls *LetStatement) String() string
  • func (ls *LetStatement) TokenLiteral() string
• type Node
• type PrefixExpression
  • func (pe *PrefixExpression) String() string
  • func (pe *PrefixExpression) TokenLiteral() string
• type Program
  • func (p *Program) String() string
  • func (p *Program) TokenLiteral() string
• type ReturnStatement
  • func (rs *ReturnStatement) String() string
  • func (rs *ReturnStatement) TokenLiteral() string
• type Statement

Types

type Expression

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

expression can produce value

type ExpressionStatement

type ExpressionStatement struct {
	Token      token.Token
	Expression Expression
}

ExpressionStatement expression表达式

func (*ExpressionStatement) String

func (es *ExpressionStatement) String() string

func (*ExpressionStatement) TokenLiteral

func (es *ExpressionStatement) TokenLiteral() string

type Identifier

type Identifier struct {
	Token token.Token
	Value string
}

Identifier标识符， 一个语句有三部分组成 identifieer operator expression/identifier

func (*Identifier) String

func (i *Identifier) String() string

func (*Identifier) TokenLiteral

func (i *Identifier) TokenLiteral() string

type InfixExpression

type InfixExpression struct {
	Token    token.Token
	Left     Expression
	Operator string
	Right    Expression
}

中缀表达式

func (*InfixExpression) String

func (ie *InfixExpression) String() string

func (*InfixExpression) TokenLiteral

func (ie *InfixExpression) TokenLiteral() string

type IntegerLiteral

type IntegerLiteral struct {
	Token token.Token
	Value int64
}

整型表达式 <integer>;

func (*IntegerLiteral) String

func (il *IntegerLiteral) String() string

func (*IntegerLiteral) TokenLiteral

func (il *IntegerLiteral) TokenLiteral() string

type LetStatement

type LetStatement struct {
	Token token.Token // the token.LET token
	Name  *Identifier // the identifier in the left let statement
	Value Expression  // pointer an expression node
}

func (*LetStatement) String

func (ls *LetStatement) String() string

func (*LetStatement) TokenLiteral

func (ls *LetStatement) TokenLiteral() string

type Node

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

type PrefixExpression

type PrefixExpression struct {
	Token    token.Token
	Operator string
	Right    Expression
}

前缀表达式 // as the following format <prefix operator><expression>;

func (*PrefixExpression) String

func (pe *PrefixExpression) String() string

func (*PrefixExpression) TokenLiteral

func (pe *PrefixExpression) TokenLiteral() string

type Program

type Program struct {
	Statements []Statement
}

the root of ast

func (*Program) String

func (p *Program) String() string

func (*Program) TokenLiteral

func (p *Program) TokenLiteral() string

type ReturnStatement

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

ReturnStatement return 语句

func (*ReturnStatement) String

func (rs *ReturnStatement) String() string

func (*ReturnStatement) TokenLiteral

func (rs *ReturnStatement) TokenLiteral() string

type Statement

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

statement don't produce value