c++ template custom warning -


i'm working c++11 , have code equivalent to

template<typename t1, typename t2> auto add_func( const t1& lhs, const t2& rhs ) {     return lhs + rhs; }

when compile code using float , int t1 , t2 respectively warnings mentioning conversion might cause loss of data, natural.

my problem every instance of warning point line return lhs + rhs; makes warning pretty useless.

is there way (ideally portable way) re-throw these warning function called instead of inside template?

i'm working visual studio 2012 portable way preferable

edit:

to more clear: know warning correct , caused misuse of code, issue compiler find me places such misuse done. right now, if warning appears, have validate hand each call add_func, not seem maintainable me.

i hope makes more sense now

hooking compiler's warning system seems non-starter me. instead, seems need find more information warning.

i assume building inside of visual studio. if so, switch error list output window , should see following:

1>add_fun.cpp(31): warning c4244: 'return' : conversion 'const float' 'int', possible loss of data 1>          add_fun.cpp(38) : see reference function template instantiation 't1 add_func<int,float>(const t1 &,const t2 &)' being compiled 1>          1>          [ 1>              t1=int, 1>              t2=float 1>          ]

the operative line here "add_fun.cpp(38) : see reference function template instantiation", tell template being instantiated.

this visual c++-specific, compilers should include similar information in full error test.


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