Varadic macro helpers - Here be many dragons. More...

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Macros
#define	STR(x) _STR(x)
	Stringise an expression, expanding preprocessor tokens. More...

#define	VA_NARGS(...) VA_NARGS_(X,##__VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
	Count the number of varadic arguments provided. More...

#define	VAR_MACRO_C1(macro, c1, ...) VAR_MACRO_C1_(macro, c1, VA_NARGS(__VA_ARGS__), ##__VA_ARGS__)
	Call a macro variation, based on the number of varadic arguments. More...

#define	IS_DEFINED(x) _IS_DEFINED(x)
	Evalute whether the CONFIG_ token `x` is defined. More...

Detailed Description

Varadic macro helpers - Here be many dragons.

Definition in file macro_magic.h.

Macro Definition Documentation

◆ STR

#define STR ( x ) _STR(x)

Stringise an expression, expanding preprocessor tokens.

Parameters

x	Expression to stringise.

Definition at line 17 of file macro_magic.h.

◆ VA_NARGS

#define VA_NARGS ( ... ) VA_NARGS_(X,##__VA_ARGS__, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)

Count the number of varadic arguments provided.

  VA_NARGS()     => 0
  VA_NARGS(x)    => 1
  VA_NARGS(x, y) => 2

Currently functions for 0 to 11 arguments.

Definition at line 33 of file macro_magic.h.

◆ VAR_MACRO_C1

#define VAR_MACRO_C1	(	macro,
		c1,
		...
	)	VAR_MACRO_C1_(macro, c1, VA_NARGS(__VA_ARGS__), ##__VA_ARGS__)

Call a macro variation, based on the number of varadic arguments.

Parameters

macro	Partial token to call a variation of.
c1	Constant parameter to pass through.
...	Varadic arguments to pass through.

Tokenises 'macro' with the count of varadic arguments, passing 'c1' and the varadic arguments.

  VAR_MACRO_C1(m, c)          => m0(c)
  VAR_MACRO_C1(m, c, x)       => m1(c, x)
  VAR_MACRO_C1(m, c, x, y)    => m2(c, x, y)
  VAR_MACRO_C1(m, c, x, y, z) => m3(c, x, y, z)

Definition at line 58 of file macro_magic.h.

◆ IS_DEFINED

#define IS_DEFINED ( x ) _IS_DEFINED(x)

Evalute whether the CONFIG_ token x is defined.

Suitable for use in an if () condition, even if x is not defined. Will strictly evaluate to 0 or 1.