Typetraits

Basic Type traits in DuMu^x. More...

Description

Classes
struct	Dumux::ProblemTraits< Problem >
	Type traits for problem classes. More...

Typedefs
template<class T>
using	Dumux::GridDiscretization_t = typename Detail::GridDiscretizationType<T>::type
	The grid discretization type of a class exporting it.

Functions
template<class T, class... Args>
decltype(auto)	Dumux::gridDiscretization (const T &t, Args &&... args)
	The grid discretization.
template<typename Expression>
constexpr auto	Dumux::isValid (const Expression &t)
	A function that creates a test functor to do class member introspection at compile time.

Files
file	propertysystem.hh
	The Dumux property system, traits with inheritance.
file	griddiscretization.hh
	Type traits for classes providing a grid discretization.
file	isvalid.hh
	A helper function for class member function introspection.
file	matrix.hh
	Type traits to be used with matrix types.
file	periodic.hh
	Type traits to detect periodicity support.
file	problem.hh
	Type traits for problem classes.
file	state.hh
	Type traits to be used with matrix types.
file	typetraits.hh
	Type traits.
file	utility.hh
	Utilities for template meta programming.
file	vector.hh
	Type traits to be used with vector types.

Typedef Documentation

GridDiscretization_t

template<class T>

using Dumux::GridDiscretization_t = typename Detail::GridDiscretizationType<T>::type

Note

Generic code that has to serve both the GridGeometry and the GridDiscretization interfaces should use this instead of naming either alias directly.

Function Documentation

gridDiscretization()

template<class T, class... Args>

decltype(auto) Dumux::gridDiscretization	(	const T &	t,
		Args &&...	args )

Note

Generic code that has to serve both the gridGeometry() and the gridDiscretization() interfaces should use this instead of calling either accessor directly.

the args make it work for multidomain problems

isValid()

template<typename Expression>

auto Dumux::isValid ( const Expression & t )

constexpr

Returns

a functor that returns true if the expression is valid with a given type / object Usage: If you want to test if a class has the member function resize(std::size_t) create a test functor

auto hasResize = isValid([](auto&& c) -> decltype(c.resize(std::size_t(1))) {}; });

Note

hasResize can be constexpr in C++17 which allows lambdas in constexpr functions The you can use the test in compile time expressions

template<class T>
auto otherFunc(const T& t)
-> typename std::enable_if_t<!decltype(hasResize(myvector))::value, double>
{ return 4.0; }