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2025-04-07 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >
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This article mainly introduces "what is the role of C++ template metaprogramming". In daily operation, I believe many people have doubts about the role of C++ template metaprogramming. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about "what is the role of C++ template metaprogramming?" Next, please follow the editor to study!
T.121: template metaprogramming is mainly used to imitate concepts
Reason (reason)
Until concepts become generally available, we need to emulate them using TMP. Use cases that require concepts (e.g. Overloading based on concepts) are among the most common (and simple) uses of TMP.
Before concepts are generally available, we need to use TMP to mimic them. Usage scenarios that require concepts (such as concept-based overloading) are in the more common (and simpler) use of TMP.
Example (sample)
Template
/ * requires*/ enable_if
Advance (Iter p, int n) {p + = n;}
Template
/ * requires*/ enable_if
Advance (Iter p, int n) {assert (n > = 0); while (n Mel -) + + p;} Note (note)
Such code is much simpler using concepts:
The above code would be much easier if you use the concept:
Void advance (RandomAccessIterator p, int n) {p + = n;}
Void advance (ForwardIterator p, int n) {assert (n > = 0); while (n Mel -) + + p;}
At this point, the study of "what is the role of C++ template metaprogramming" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
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