DUNE PDELab (2.8)
template mapping a type to std::false_type
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#include <dune/common/std/type_traits.hh>
Detailed Description
class Dune::Std::to_false_type< T >
template mapping a type to std::false_type
- Deprecated:
- Use Dune::AlwaysFalse (from dune/common/typetraits.hh) instead
- Template Parameters
-
T Some type
Suppose you have a template class. You want to document the required members of this class in the non-specialized template, but you know that actually instantiating the non-specialized template is an error. You can try something like this:
This will trigger static_assert() as soon as the compiler reads the definition for the Traits template, since it knows that "false" can never become true, no matter what the template parameters of Traits are. As a workaround you can use to_false_type: replace false
by to_false_type<T>::value
, like this:
Since there might be an specialization of to_false_type for template parameter T, the compiler cannot trigger static_assert() until the type of T is known, that is, until Traits<T> is instantiated.
The documentation for this class was generated from the following file:
- dune/common/std/type_traits.hh
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