[Blog][TopDownOperatorPrecedence(再帰下降構文解析)におけるExpression(式)の解析処理を追う] token precedences

tokenprecedences.go

var precedences = map[token.TokenType]int{
	token.EQ:       EQUALS,
	token.NOT_EQ:   EQUALS,
	token.LT:       LESSGRETER,
	token.GT:       LESSGRETER,
	token.PLUS:     SUM,
	token.MINUS:    SUM,
	token.SLASH:    PRODUCT,
	token.ASTERISK: PRODUCT,
}