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Macros
#define	NNGN_PASTE(x, y) x ## y
	Token pasting macro.

#define	NNGN_PASTE2(x, y) NNGN_PASTE(x, y)
	Token pasting macro, with one level of indirection.

#define	NNGN_ARGC(...) NNGN_ARGC0(__VA_ARGS__ __VA_OPT__(,) 7, 6, 5, 4, 3, 2, 1, 0)
	Counts the number of arguments given.

#define	NNGN_ARGC0(_0, _1, _2, _3, _4, _5, _6, _7, ...) _7

#define	NNGN_OVERLOAD(f, ...) NNGN_PASTE2(f, NNGN_ARGC(__VA_ARGS__))(__VA_ARGS__)
	Calls an overloaded macro.

Macro Definition Documentation

◆ NNGN_ARGC

#define NNGN_ARGC ( ... ) NNGN_ARGC0(__VA_ARGS__ __VA_OPT__(,) 7, 6, 5, 4, 3, 2, 1, 0)

Counts the number of arguments given.

An empty call yields 0.

◆ NNGN_ARGC0

#define NNGN_ARGC0	(	_0,
		_1,
		_2,
		_3,
		_4,
		_5,
		_6,
		_7,
		... ) _7

◆ NNGN_OVERLOAD

#define NNGN_OVERLOAD	(		f,
			... ) NNGN_PASTE2(f, NNGN_ARGC(__VA_ARGS__))(__VA_ARGS__)

Calls an overloaded macro.

The intended usage is:

#define F(...) NNGN_OVERLOAD(F, __VA_ARGS__)
#define F0() // ...
#define F1(_0) // ...
#define F2(_0, _1) // ...
// ...

When F is called, the call will be forwarded to the name resulting from pasting F with the number of arguments.

◆ NNGN_PASTE

#define NNGN_PASTE	(		x,
			y ) x ## y

Token pasting macro.

◆ NNGN_PASTE2

#define NNGN_PASTE2	(		x,
			y ) NNGN_PASTE(x, y)

Token pasting macro, with one level of indirection.