waiig15/ast/infix_expression.go

package ast

import (
	"bytes"

	"code.osinet.fr/fgm/waiig15/token"
)

// InfixExpression fulfills the Node and Statement interfaces.
// It represents a prefixed expression like:
// "-5;"
type InfixExpression struct {
	Token    token.Token
	Left     Expression
	Operator string
	Right    Expression
}

// String satisfies the Node and fmt.Stringer interfaces.
func (ie *InfixExpression) String() string {
	var out bytes.Buffer

	out.WriteString("(")
	out.WriteString(ie.Left.String())
	out.WriteString(" " + ie.Operator + " ")
	out.WriteString(ie.Right.String())
	out.WriteString(")")

	return out.String()
}

func (ie *InfixExpression) expressionNode() {}

// TokenLiteral satisfies the Node interface.
func (ie *InfixExpression) TokenLiteral() string {
	return ie.Token.Literal
}