How does make_pair know the types of its args?
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by bobobobo
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Published on 2010-04-19T22:59:35Z
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2010/04/19
23:03 UTC
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The definition for make_pair in the MSVC++ "utility" header is:
template<class _Ty1,
class _Ty2> inline
pair<_Ty1, _Ty2> make_pair(_Ty1 _Val1, _Ty2 _Val2)
{ // return pair composed from arguments
return (pair<_Ty1, _Ty2>(_Val1, _Val2));
}
I use make_pair all the time though without putting the argument types in angle brackets:
map<string,int> theMap ;
theMap.insert( make_pair( "string", 5 ) ) ;
Shouldn't I have to tell make_pair that the first argument is std::string and not char* ?
How does it know?
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