ast

type ArrayLiteral struct {
	Token    token.Token
	Size     Expression // MEMO: nilかINTしか入らないから型で縛った方が良さそう
	Elements []Expression
}

type AssignmentExpression struct {
	Token token.Token
	Left  Expression
	Value Expression
}

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

type Boolean struct {
	Token token.Token
	Value bool
}

type BreakStatement struct {
	Token token.Token
}

type CallExpression struct {
	Token     token.Token // '('トークン
	Function  Expression  // Identifier
	Arguments []Expression
}

type ConstStatement struct {
	Token token.Token
	Name  *Identifier
	Value Expression
}

type ContinueStatement struct {
	Token token.Token
}

type DimStatement struct {
	Token token.Token
	Name  *Identifier
	Value Expression
}

type Empty struct {
	Token token.Token
}

type EmptyArgument struct {
	Token token.Token
}

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

type ExpressionStatement struct {
	Token token.Token // 式の最初のトークン
	Expression
}

type ForInStatement struct {
	Token      token.Token
	LoopVar    *Identifier
	Collection Expression
	Block      *BlockStatement
}

type ForToStepStatement struct {
	Token   token.Token
	LoopVar *Identifier
	From    Expression
	To      Expression
	Step    Expression
	Block   *BlockStatement
}

type FunctionStatement struct {
	Token      token.Token
	Name       *Identifier
	Parameters []*Identifier
	Body       *BlockStatement
	IsProc     bool
}

type HashTableStatement struct {
	Token token.Token
	Name  *Identifier
	Value Expression
}

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

type IfStatement struct {
	Token       token.Token // 'if'トークン
	Condition   Expression
	Consequence Statement
	Alternative Statement
}

type IfbStatement struct {
	Token       token.Token // 'if'トークン
	Condition   Expression
	Consequence *BlockStatement
	Alternative Statement // *IfStatement(ELSEIF) or *BlockStatement(ELSE) or nil
}

type IndexExpression struct {
	Token  token.Token // '[' トークン
	Left   Expression
	Index  Expression
	Option Expression
}

type InfixExpression struct {
	Token    token.Token // 演算子トークン 、「+」など
	Left     Expression
	Operator string
	Right    Expression
}

type IntegerLiteral struct {
	Token token.Token
	Value int64
}

type Node interface {
	// デバッグ or テスト用
	TokenLiteral() string
	String() string
}

type PrefixExpression struct {
	Token    token.Token // 前置トークン 、「!」など
	Operator string
	Right    Expression
}

type Program struct {
	Statements []Statement
}

type ResultStatement struct {
	Token       token.Token // 'RESULT'トークン
	ResultValue Expression
}

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

type StringLiteral struct {
	Token token.Token
	Value string
}