util::always_true_type< typename > Struct Template Reference

A std::true_type with a template argument. More...

#include "MetaUtils.h"

Inheritance diagram for util::always_true_type< typename >:

Detailed Description

template<typename>
struct util::always_true_type< typename >

A std::true_type with a template argument.

See also

util::always_false_type, util::always_true_v

This is one way to allow to specialize for classes with a certain type:

template <typename T, typename = void>
class ReferenceTypeExtractor {
  static_assert(util::always_false_type<T>(), "Type has no reference!");
};

template <typename Cont>
struct ReferenceTypeExtractor<
  Cont,
  std::enable_if_t
    <util::always_true_type<typename Cont::value_type>::value>
  >
{
  using type = typename Cont::reference;
};

Definition at line 140 of file MetaUtils.h.

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The documentation for this struct was generated from the following file:

• larcorealg/v09_13_01/source/larcorealg/CoreUtils/MetaUtils.h