Your own type predicate—Andrzej Krzemieński

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A very detailled and complete article to start playing with template predicates!

Your own type predicate

by Andrzej Krzemieński

From the article:

In this post we will see how to define a type trait or a type predicate or a meta-function that would allow us to check at compile time whether a type exposes an interface that we need. That is, we want to check if a given type T has:

  • nested typename result_type,
  • static member function set_limit that takes one argument of type int,
  • member function get_result that returns type const result_type& and that is declared not to throw exceptions...

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