Expression ReadString()
{
Token start = Consume(TokenKind.StringStart);
StringExpression exp = new StringExpression(start.Line, start.Col);
while (true)
{
Token tok = Current;
if (tok.TokenKind == TokenKind.StringEnd)
{
Consume();
break;
}
else if (tok.TokenKind == TokenKind.EOF)
{
throw new ParseException("Unexpected end of file", tok.Line, tok.Col);
}
else if (tok.TokenKind == TokenKind.StringText)
{
Consume();
exp.Add(new StringLiteral(tok.Line, tok.Col, tok.Data));
}
else if (tok.TokenKind == TokenKind.ExpStart)
{
exp.Add(ReadExpression());
}
else
{
throw new ParseException("Unexpected token in string: " + tok.TokenKind, tok.Line, tok.Col);
}
}
if (exp.ExpCount == 1)
{
return(exp[0]);
}
else
{
return(exp);
}
}
private Expression _ReadString()
{
Token start = _Consume(TokenKind.StringStart);
StringExpression exp = new StringExpression(start.Line, start.Col);
while (true)
{
Token tok = Current;
if (tok.TokenKind == TokenKind.StringEnd)
{
_Consume();
break;
}
else if (tok.TokenKind == TokenKind.EOF)
{
throw new ParseException("文档意外终止。", tok.Line, tok.Col);
}
else if (tok.TokenKind == TokenKind.StringText)
{
_Consume();
exp.Add(new StringLiteral(tok.Line, tok.Col, tok.Data));
}
else if (tok.TokenKind == TokenKind.ExpStart)
{
exp.Add(_ReadExpression());
}
else
{
throw new ParseException("意外的 Token 字符串：" + tok.TokenKind, tok.Line, tok.Col);
}
}
if (exp.ExpCount == 1)
{
return(exp[0]);
}
else
{
return(exp);
}
}
Expression ReadString()
{
Token start = Consume(TokenKind.StringStart);
StringExpression exp = new StringExpression(start.Line, start.Col);
while (true)
{
Token tok = Current;
if (tok.TokenKind == TokenKind.StringEnd)
{
Consume();
break;
}
else if (tok.TokenKind == TokenKind.EOF)
throw new ParseException("Unexpected end of file", tok.Line, tok.Col);
else if (tok.TokenKind == TokenKind.StringText)
{
Consume();
exp.Add(new StringLiteral(tok.Line, tok.Col, tok.Data));
}
else if (tok.TokenKind == TokenKind.ExpStart)
exp.Add(ReadExpression());
else
throw new ParseException("Unexpected token in string: " + tok.TokenKind, tok.Line, tok.Col);
}
if (exp.ExpCount == 1)
return exp[0];
else
return exp;
}