private bool TryParseDouble(string expression, out Expression result)
{
result = null;
var match = DoubleRegex.Match(expression);
if (!match.Success)
{
return(false);
}
var value = match.Groups[0].Value;
float @float;
if (float.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out @float))
{
result = new Expression.Constant {
Value = $"{value}f", TypeName = "float"
};
return(true);
}
double @double;
if (double.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out @double))
{
result = new Expression.Constant {
Value = expression, TypeName = "double"
};
return(true);
}
return(false);
}
private bool TryParseId(string expression, out Expression result)
{
result = null;
var match = IdRegex.Match(expression);
if (!match.Success)
{
return(false);
}
var value = match.Groups[0].Value;
string macroExpression;
Expression referenceExpression;
if (!_macroMap.TryGetValue(value, out macroExpression) || !TryParse(macroExpression, out referenceExpression))
{
return(false);
}
result = new Expression.Constant {
Value = expression, TypeName = referenceExpression.TypeName
};
return(true);
}
private bool TryParseInt(string expression, out Expression result)
{
result = null;
var matchHex = IntHexRegex.Match(expression);
if (matchHex.Success)
{
var minus = matchHex.Groups[1].Value == "-" ? -1 : 1;
var value = matchHex.Groups[2].Value;
var sign = matchHex.Groups[3].Value.ToLower();
var type = matchHex.Groups[4].Value.ToLower();
int @int;
if (int.TryParse(value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out @int) && minus * @int != int.MinValue)
{
result = minus == 1
? new Expression.Constant {
Value = $"0x{value}", TypeName = sign + "int"
}
: new Expression.Constant {
Value = $"0x{value}", TypeName = sign + "long"
};
return(true);
}
long @long;
if (long.TryParse(value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out @long))
{
result = new Expression.Constant {
Value = $"0x{value}", TypeName = sign + "long"
};
return(true);
}
decimal @decimal;
if (decimal.TryParse(value, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out @decimal))
{
result = new Expression.Constant {
Value = $"0x{value}", TypeName = sign + "decimal"
};
return(true);
}
}
else
{
var matchDecimal = IntDecimalRegex.Match(expression);
if (!matchDecimal.Success)
{
return(false);
}
var value = matchDecimal.Groups[1].Value;
var sign = matchDecimal.Groups[2].Value.ToLower();
var type = matchHex.Groups[4].Value.ToLower();
int @int;
if (int.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out @int) && @int != int.MinValue)
{
result = new Expression.Constant {
Value = expression, TypeName = sign + "int"
};
return(true);
}
long @long;
if (long.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out @long))
{
result = new Expression.Constant {
Value = expression, TypeName = sign + "long"
};
return(true);
}
decimal @decimal;
if (decimal.TryParse(value, NumberStyles.Any, CultureInfo.InvariantCulture, out @decimal))
{
result = new Expression.Constant {
Value = expression, TypeName = sign + "decimal"
};
return(true);
}
}
return(false);
}
