constforeach.h File Reference

Compile-time for each loop. More...

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Namespaces
namespace	bbm

Concepts
concept	bbm::has_constforeach_lambda
	Concept to check if a lambda functions meets the required signature.

Macros
#define	CONSTFOREACH(ITR_TYPE, TYPE_LIST, ...)   if constexpr (sizeof...(TYPE_LIST) > 0) bbm::constforeach<TYPE_LIST...>( [&]<typename ITR_TYPE>() { __VA_ARGS__ } );
	HELPER MACRO.

Functions
template<typename... T, typename F > requires has_constforeach_lambda<F, T...>
constexpr void	constforeach (F &&f)
	constforeach over all typenames in T.

Detailed Description

Compile-time for each loop.

Expects the body to passed as a templated lambda that takes the typenames and no arguments.

Example:

constforeach<Ts...>( [&]<typename T>()
{
  std::cerr << typestring<T> << std::endl;
});

Prints the typestrings of all typenames in Ts.

A helper macro simplifies the call:

CONSTFOREACH(T, TS,
{
  std::cerr << typestring<T> << std::endl;
});

Macro Definition Documentation

CONSTFOREACH

#define CONSTFOREACH	(		ITR_TYPE,
			TYPE_LIST,
			...
	)		if constexpr (sizeof...(TYPE_LIST) > 0) bbm::constforeach<TYPE_LIST...>( [&]<typename ITR_TYPE>() { __VA_ARGS__ } );

HELPER MACRO.