Bug#144409: g++-3.0: does not support transform(begin,end,be

["Sean 'Shaleh' Perry" <shalehperry@attbi.com>]

>> int main(int argc, char* argv[]) {
>>     string foo = "Some Mixed Case Text";
>>     cout << foo << endl;
>>     transform(foo.begin(), foo.end(), foo.begin(), tolower);
> 
> The compiler can't properly resolve "tolower": The problem is that
> tolower is not only a function in namespace std, it is also a template
> (22.1.3/2). Therefore, in the call to transform, template argument
> deduction fails because of the ambiguity.
> 
> You can fix your code in the following ways:
> 1. Define a wrapper function around tolower that you pass to
>    transform.
> 2. Explicitly select the tolower you want to use, by writing
> 
>     transform(foo.begin(), foo.end(), foo.begin(),
> (int(*)(int))std::tolower);
> 
>    The cast causes, on the one hand, an explicit overload resolution
>    in favour of the function; it also allows the compiler to properly
>    deduce the third argument to transform.
> 

man, neither option is particularly pretty, but the cast does let the code
compile.

I suppose I can define my own tolower() function based on the library's
version rather than use a wrapper.

Thanks for helping Martin.  It is disappointing that the above code breaks.


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