Expression Parse_OpRegex()
{
Expression expr = Parse_FunctionCall();
for (;;)
{
TokenType op = m_Tokenizer.PeekNextToken().type;
if (op != TokenType.OpRegexMatch && op != TokenType.OpRegexNotMatch)
{
break;
}
m_Tokenizer.ConsumeNextToken();
Token token = m_Tokenizer.PeekNextToken();
Expression regex_expr = Parse_FunctionCall();
Value const_val = regex_expr.EliminateConstSubExpressions();
if (const_val == null)
{
throw new ParserException(m_Tokenizer.Text, token.pos, "Expected a constant expression that evaluates into a regex string. This expression isn't constant.");
}
if (!(const_val is StringValue))
{
throw new ParserException(m_Tokenizer.Text, token.pos, "Expected a constant expression that evaluates into a regex string. This expression evaluates to a bool constant.");
}
Regex regex;
try
{
regex = new Regex(const_val.ToString(), RegexOptions.IgnoreCase);
}
catch (System.Exception ex)
{
throw new ParserException(m_Tokenizer.Text, token.pos, "Invalid regex! " + ex.Message);
}
expr = new OpRegexMatch(expr, regex_expr, regex, op == TokenType.OpRegexNotMatch);
}
return(expr);
}
Expression Parse_OpRegex()
{
Expression expr = Parse_FunctionCall();
for (;;)
{
TokenType op = m_Tokenizer.PeekNextToken().type;
if (op != TokenType.OpRegexMatch && op != TokenType.OpRegexNotMatch)
break;
m_Tokenizer.ConsumeNextToken();
Token token = m_Tokenizer.PeekNextToken();
Expression regex_expr = Parse_FunctionCall();
Value const_val = regex_expr.EliminateConstSubExpressions();
if (const_val == null)
throw new ParserException(m_Tokenizer.Text, token.pos, "Expected a constant expression that evaluates into a regex string. This expression isn't constant.");
if (!(const_val is StringValue))
throw new ParserException(m_Tokenizer.Text, token.pos, "Expected a constant expression that evaluates into a regex string. This expression evaluates to a bool constant.");
Regex regex;
try
{
regex = new Regex(const_val.ToString(), RegexOptions.IgnoreCase);
}
catch (System.Exception ex)
{
throw new ParserException(m_Tokenizer.Text, token.pos, "Invalid regex! " + ex.Message);
}
expr = new OpRegexMatch(expr, regex_expr, regex, op == TokenType.OpRegexNotMatch);
}
return expr;
}
