constfor.h File Reference

Complile-time for loop. More...

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Namespaces
namespace	bbm

Concepts
concept	bbm::has_constfor_lambda
	Concept to check if a lambda function meets the required signature.

Macros
#define	CONSTFOR(IDX, NUMITR, ...)   bbm::constfor<NUMITR>( [&]<size_t IDX>() { __VA_ARGS__; } );
	HELPER MACRO.

Functions
template<typename F , size_t... IDX> requires (sizeof...(IDX) == 0 || has_constfor_lambda<F>)
constexpr void	constfor (F &&f, std::index_sequence< IDX... >)
	constfor given an index sequence of indexes.
template<size_t NumItr, typename F > requires (NumItr == 0 || has_constfor_lambda<F>)
constexpr void	constfor (F &&f)
	constfor given the number of iterations

Detailed Description

Complile-time for loop.

Expects the body to be passed as a templated lambda that takes a size_t literal as template parameter, and no arguments.

Example:

constfor<4>( []<size_t IDX>() 
{
  std::cerr << IDX << std::endl;
});

Prints values from 0 to 3.

A helper macro simplifies the call:

CONSTFOR(IDX, 4,
{
   std::cerr << IDX << std::endl;
});

Macro Definition Documentation

CONSTFOR

#define CONSTFOR	(		IDX,
			NUMITR,
			...
	)		bbm::constfor<NUMITR>( [&]<size_t IDX>() { __VA_ARGS__; } );

HELPER MACRO.