private Func <Type, string, ParseStep.Result> _CreateParseContext()
{
var _stack = new HashSet <ParseStep>();
Func <Type, string, ParseStep.Result> _tryParse = null;
_tryParse = (_type, _s) =>
{
var _parseSteps = _GetParseSteps(_type);
if (_parseSteps.Length == 0)
{
return(StringParseResult.UnsupportedType(_type, _s));
}
foreach (var _parseStep in _parseSteps)
{
if (_stack.Add(_parseStep))
{
return(_parseStep.TryParse(_type, _s, _CultureInfo, _tryParse));
}
}
return(StringParseResult.InvalidString(_type, _s));
};
return(_tryParse);
}
public override StringParseResult <object> TryParse(Type type, string s)
{
try
{
return(StringParseResult.Valid(type, s, Convert.ChangeType(s, type, _CultureInfo)));
}
catch (InvalidCastException)
{
return(StringParseResult.UnsupportedType(type, s));
}
catch (FormatException)
{
return(StringParseResult.InvalidString(type, s));
}
catch (OverflowException)
{
return(StringParseResult.InvalidString(type, s));
}
}
public StringParseResult <object> ToStringParseResult(Type type, string s)
{
if (UnderlyingResult.HasValue)
{
return(UnderlyingResult.Value);
}
if (IsTypeSupported.GetValueOrDefault() && IsStringValid.GetValueOrDefault())
{
return(StringParseResult.Valid(type, s, Value));
}
if (!IsTypeSupported.GetValueOrDefault(true))
{
return(StringParseResult.UnsupportedType(type, s));
}
if (!IsStringValid.GetValueOrDefault(true))
{
return(StringParseResult.InvalidString(type, s));
}
throw new UnexpectedStringParseErrorException();
}