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Previously, if you accidentally tried to copy between any_function instances 

with incompatible function signatures you got a really confusing error message
from the compiler.  This change makes it so you get a much more informative
error message.
This commit is contained in:
Davis King 2012-12-21 22:27:40 -05:00
parent cfc6e83d01
commit ea55f97ef4
1 changed files with 12 additions and 0 deletions
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12
dlib/any/any_function_impl2.h
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@ -13,6 +13,12 @@
#define DLIB_ANY_FUNCTION_RETURN return
#include "any_function_impl.h"
#undef DLIB_ANY_FUNCTION_RETURN
private:
// You get a compiler error about this function being private if you try to assign
// or copy between any_functions with different types. You must only copy between
// any_functions that represent functions with the same signature.
template <typename T, typename U> any_function(const any_function<T,U>&);
};
// The case where function_type has a void return type
@ -22,6 +28,12 @@
#define DLIB_ANY_FUNCTION_RETURN
#include "any_function_impl.h"
#undef DLIB_ANY_FUNCTION_RETURN
private:
// You get a compiler error about this function being private if you try to assign
// or copy between any_functions with different types. You must only copy between
// any_functions that represent functions with the same signature.
template <typename T> any_function(const any_function<T>&);
};
#undef DLIB_ANY_FUNCTION_ARG_LIST