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August 29th, 2021, 04:02 AM
#1
Using template<> without an argument type
A program I'm working on seems to have a lot of functions like this in its header files:-
Code:
template <>
inline std::string to_string (bool val)
{
std::string tmp;
bool_to_string (val, tmp);
return tmp;
}
How is that function any different from a regular inline function? i.e. does the empty template<> line add something special?
"A problem well stated is a problem half solved.” - Charles F. Kettering
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August 30th, 2021, 03:29 AM
#2
Re: Using template<> without an argument type
This is a function specialization.
Somewhere you should have a templated function something like this:
Code:
template <typename T>
inline std::string to_string (T val)
{
//....
}
When a function specialization is provided, if the signature matches then the specialized function is used. if no match then the general template function is used.
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C++23 Compiler: Microsoft VS2022 (17.6.5)
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