Question

Could I use an std functions in a template functions?
I have add and wrote

#pragma region BlendFunctions

template <class T> 
T BlendLightenf(T x, T y) 
{ 
    return std::max(x, y); //errors here
} 
template <class T> 
T BlendDarkenf(T x, T y) 
{ 
  return std::min(x, y); //errors here
} 

And get

error C2589: '(' : illegal token on right side of '::'

and

error C2059: syntax error : '::'

right in the one string (x and y are usually float).

My defines:

#ifdef MAGICLIB_EXPORTS
#define CPPWIN32DLL_API __declspec(dllexport)
#else
#define CPPWIN32DLL_API __declspec(dllimport)
#endif


#include <stdio.h>
#include <string>
#include <algorithm> 

Answer 1

Check that max isn’t defined by somebody else.

Sometimes you include a file that defines max as something else (most likely (a > b ? a : b) or something like that).

If you have one of those files included the preprocessor will break std::max by replacing max with its definition (something like this std::(a > b ? a : b)) and you get a strange error.

You can add #undef max after the offending header and you’ll be ok.