Special considerations in naming template functions

C Naming rule requirements for template functions: 1. Choose non-dependent names to avoid naming conflicts; 2. Use template parameter prefixes to highlight dependencies; 3. When returning an auxiliary type, use this type as a prefix; 4. Overload functions When using template parameters as distinguishing parameters, avoid default template parameters.

Special considerations in naming template functions

In C template programming, you need to pay attention to the following matters when naming template functions:

1. Non-dependent function name

The template function name should choose a non-dependent name, that is, it does not depend on specific template parameters. This avoids naming conflicts when calling functions with different template parameters. For example:

template<class T>
void sort(T* arr, int len);

2. Template parameter prefix

In order to emphasize the dependence between the template function and specific template parameters, you can add the template parameter prefix before the function name. This helps distinguish functions with the same name but different template parameters. For example:

template<class T>
void sort_int(T* arr, int len);

template<class T>
void sort_double(T* arr, int len);

3. Auxiliary type

If the template function returns an auxiliary type, you can use that type as the prefix of the function name. This can make the function name more descriptive. For example:

template<class T>
typedef Vector<T> VectorT;

template<class T>
VectorT<T> create_vector(T val);

4. Function overloading

When a template function needs to be overloaded, you can follow the following rules:

• Use templates Parameters are used as overloaded parameters to distinguish between different versions.
• If the overloaded version only applies to a specific template parameter type, you can add the template parameter prefix before the function name.
• Try to avoid using default template parameters as they may cause naming conflicts.

Practical example:

Consider the following code, which demonstrates special considerations in template function naming:

#include <iostream>
#include <vector>

template<class T>
void print_vector(std::vector<T>& vec) {
    for (auto& elem : vec) {
        std::cout << elem << " ";
    }
    std::cout << std::endl;
}

template<class T>
std::vector<T> create_vector(T val, int size) {
    std::vector<T> vec(size, val);
    return vec;
}

int main() {
    std::vector<int> int_vec = create_vector<int>(10, 5);
    print_vector(int_vec);

    std::vector<double> double_vec = create_vector<double>(3.14, 10);
    print_vector(double_vec);

    return 0;
}

In this example , the template functions print_vector and create_vector use non-dependent names and type prefixes to clarify their dependencies. This way the code is easier to read and understand, and naming conflicts are avoided.

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