How Can You Define Template Member Functions Outside Class Definitions in C ?

Defining Template Member Functions Outside Class Definitions

In the realm of C template programming, you may encounter a scenario where you need to define a template member function of a template class outside the class definition. While the example code provided addresses the issue of defining a template member function, it lacks a critical aspect: preserving access to both template parameters, T and U, simultaneously.

To rectify this, we employ the following syntax:

<code class="cpp">template<class T> template <class U>
void Foo<T>::bar() { ... }</code>

By prefixing the function's definition with both class and function templates, we ensure that the member function is associated with the correct template class while allowing access to both template parameters. The preceding template prefixes instruct the compiler to substitute the specific template arguments T and U into the member function definition at compilation time.

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