示例#1
0
文件: lex.go 项目: yingmsky/e8vm
func lexAsm8(x *lex8.Lexer) *lex8.Token {
	r := x.Rune()
	if x.IsWhite(r) {
		panic("incorrect token start")
	}

	switch r {
	case '\n':
		x.Next()
		return x.MakeToken(Endl)
	case '{':
		x.Next()
		return x.MakeToken(Lbrace)
	case '}':
		x.Next()
		return x.MakeToken(Rbrace)
	case '/':
		x.Next()
		return lex8.LexComment(x)
	case '"':
		return lex8.LexString(x, String, '"')
	}

	if isOperandChar(r) {
		return lexOperand(x)
	}

	x.Errorf("illegal char %q", r)
	x.Next()
	return x.MakeToken(lex8.Illegal)
}
示例#2
0
文件: lex.go 项目: yingmsky/e8vm
func lexC8(x *lex8.Lexer) *lex8.Token {
	r := x.Rune()
	if x.IsWhite(r) {
		panic("incorrect token start")
	}

	switch r {
	case '\n':
		x.Next()
		return x.MakeToken(Endl)
	case '"':
		return lex8.LexString(x, String, '"')
	case '\'':
		return lex8.LexString(x, Char, '\'')
	}

	if isDigit(r) {
		return lexNumber(x)
	} else if isLetter(r) {
		return lexIdent(x)
	}

	// always make progress at this point
	x.Next()
	t := lexOperator(x, r)
	if t != nil {
		return t
	}

	x.Errorf("illegal char %q", r)
	return x.MakeToken(lex8.Illegal)
}