Expression: string subscript out of range

[VirtualizeThis]

I'm having an issue with a function causing an error when running.

The function is:

wstring Tools::FormatPlainText(wstring Text) {
	wstring result = L"";
	wstring TextLocal;
	//Capitalise
	TextLocal = boost::to_upper_copy(Text);
	//Remove characters missing from charset
	wstring arrText = TextLocal;
	int i = sizeof(arrText) - 1;
	while (i > 0)
	{
		if (strchr(CHARSET, arrText[i]))
		{
			result += arrText[i];
		}
		i = i - 1;
	}
	return result;
};

The debugging comes back with this error:
Expression: string subscript out of range

#ifdef _DEBUG
_CRTIMP2_PURE void __CLRCALL_PURE_OR_CDECL _Debug_message(const wchar_t *message, const wchar_t *file, unsigned int line)
	{	// report error and die
        if(::_CrtDbgReportW(_CRT_ASSERT, file, line, NULL, L"%ls", message)==1)
        {
            ::_CrtDbgBreak();
        }
	}
_CRTIMP2_PURE void __CLRCALL_PURE_OR_CDECL _Debug_message(const unsigned short *message, const unsigned short *file, unsigned int line)
	{	// report error and die
        _Debug_message((wchar_t *) message, (wchar_t *) file, line);
	}

#endif 

I know there is some wasteful code in here. I'm just playing with it trying to get it to work. All help is appreciated.

[Duthomhas]

Be careful with your string types.

[VirtualizeThis]

I agree. I went back and forth on what the correct type was to use. I've tried wstring and string but both create this error. I settled on wstring since I'm compiling on Windows.

Could you provide more insight that might help me with the issue?

[ne555]

> int i = sizeof(arrText) - 1;
http://en.cppreference.com/w/cpp/language/sizeof
sizeof does not give you the lenght of the string, for that use the member function `.lenght()'

[VirtualizeThis]

Wow was I using that incorrectly then!!! Thank you!