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C++ Language/Templates
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A "template" is C++ source code that doesn't get compiled into machine language at the time it's encountered by the compiler.
Instead, the compiler remembers that code.
The template contains one or more template-parameters; later, the compiler will perform a compilation of that code when it first needs a "specialization" of it.
That specialization involves substituting some C++ type in place of each template-parameter.
Templated-Functions
Templated-Classes
Templated-Variables
Template-Parameters
Traits
Metaprogramming
Concepts