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2025-01-26 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
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This article introduces the knowledge of "introduction and usage of C++ template function overloading". Many people will encounter this dilemma in the operation of actual cases. then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
1: if the instantiated template function is the same as the call of a non-template function, it will call the non-template function. However, you can also specify to call template functions, such as:
Inline int const& max (int const& a, int const& b)
{
/ / for ease of distinction, let the returned result be + 100
Return a < b? Axiom 10: baked 100
}
Template
Inline T const& max (T const& a, T const& b)
{
Return a < b? B: a
}
/ / here the instantiated form of the template function is the same as that of a non-template function.
You can use the following method to specify that the template function is called
Int I = max (42,66)
2: because the overloaded parameter of C++ template function is type, it does not support type conversion. However, non-template functions support type conversion:
Inline int const& max (int const& a, int const& b) {return a < b? B: a;} template inline T const& max (T const& a, T const& b) {return a < b? B: a;} / / since the templated function does not support type conversion, the non-templated max function max ('censor, 42.2) will be called here
Imagine that in the above code, if max ('censor, 42. 2) wants to call the template's max function, it must satisfy the condition that both arguments and return values are of the same type. However, the given two parameter types are inconsistent, and the template function does not support type conversion. Therefore, it cannot find a matching template function and will call a non-template max function. There will be a compilation error if we force the template function to be called using max ('clocked, 42.2).
This is the end of the introduction and usage of C++ template function overloading. Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!
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