Preprocessor utilities. More...

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Macros
#define	CXXUTILS_PP_FIRST(...) CXXUTILS_PP_ARG1(__VA_ARGS__)

#define	CXXUTILS_PP_ARG1(...) __VA_OPT__(CXXUTILS_PP_ARG1_(__VA_ARGS__))

#define	CXXUTILS_PP_ARG1_(A, ...) , A

#define	CXXUTILS_PP_SECOND(...) CXXUTILS_PP_ARG2(__VA_ARGS__)

#define	CXXUTILS_PP_ARG2(...) __VA_OPT__(CXXUTILS_PP_ARG2_(__VA_ARGS__))

#define	CXXUTILS_PP_ARG2_(A, ...) CXXUTILS_PP_ARG1(__VA_ARGS__)

#define	CXXUTILS_PP_THIRD(...) CXXUTILS_PP_ARG3(__VA_ARGS__)

#define	CXXUTILS_PP_ARG3(...) __VA_OPT__(CXXUTILS_PP_ARG3_(__VA_ARGS__))

#define	CXXUTILS_PP_ARG3_(A, ...) CXXUTILS_PP_ARG2(__VA_ARGS__)

#define	CXXUTILS_PP_FOURTH(...) CXXUTILS_PP_ARG4(__VA_ARGS__)

#define	CXXUTILS_PP_ARG4(...) __VA_OPT__(CXXUTILS_PP_ARG4_(__VA_ARGS__))

#define	CXXUTILS_PP_ARG4_(A, ...) CXXUTILS_PP_ARG3(__VA_ARGS__)

#define	CXXUTILS_PP_FIFTH(...) CXXUTILS_PP_ARG5(__VA_ARGS__)

#define	CXXUTILS_PP_ARG5(...) __VA_OPT__(CXXUTILS_PP_ARG5_(__VA_ARGS__))

#define	CXXUTILS_PP_ARG5_(A, ...) CXXUTILS_PP_ARG4(__VA_ARGS__)

Detailed Description

Preprocessor utilities.

Author: scott snyder snyde.nosp@m.r@bn.nosp@m.l.gov

Date: May, 2024 Given an argument list of arbitrary length, CXXUTILS_PP_FIRST returns a comma followed by the first argument if it exists; otherwise, it expands to nothing. CXXUTILS_PP_SECOND does the same thing for the second argument, and so on through @CXXUTILS_PP_FIFTH.

That is:

CXXUTILS_PP_FIRST(a, b, c)  -> , a
CXXUTILS_PP_FIRST()         ->
CXXUTILS_PP_SECOND(a, b, c) -> , b
CXXUTILS_PP_SECOND(a)       ->

CXXUTILS_PP_ARG1 through CXXUTILS_PP_ARG5 are also available as synonyms that may be more useful if these are used through the expansion of other macros.

Definition in file pputils.h.

Macro Definition Documentation

◆ CXXUTILS_PP_ARG1

#define CXXUTILS_PP_ARG1 ( ... ) __VA_OPT__(CXXUTILS_PP_ARG1_(__VA_ARGS__))

Definition at line 36 of file pputils.h.

◆ CXXUTILS_PP_ARG1_

#define CXXUTILS_PP_ARG1_	(	A,
		...
	)	, A

Definition at line 37 of file pputils.h.

◆ CXXUTILS_PP_ARG2

#define CXXUTILS_PP_ARG2 ( ... ) __VA_OPT__(CXXUTILS_PP_ARG2_(__VA_ARGS__))

Definition at line 40 of file pputils.h.

◆ CXXUTILS_PP_ARG2_

#define CXXUTILS_PP_ARG2_	(	A,
		...
	)	CXXUTILS_PP_ARG1(__VA_ARGS__)

Definition at line 41 of file pputils.h.

◆ CXXUTILS_PP_ARG3

#define CXXUTILS_PP_ARG3 ( ... ) __VA_OPT__(CXXUTILS_PP_ARG3_(__VA_ARGS__))

Definition at line 44 of file pputils.h.

◆ CXXUTILS_PP_ARG3_

#define CXXUTILS_PP_ARG3_	(	A,
		...
	)	CXXUTILS_PP_ARG2(__VA_ARGS__)

Definition at line 45 of file pputils.h.

◆ CXXUTILS_PP_ARG4

#define CXXUTILS_PP_ARG4 ( ... ) __VA_OPT__(CXXUTILS_PP_ARG4_(__VA_ARGS__))

Definition at line 48 of file pputils.h.

◆ CXXUTILS_PP_ARG4_

#define CXXUTILS_PP_ARG4_	(	A,
		...
	)	CXXUTILS_PP_ARG3(__VA_ARGS__)

Definition at line 49 of file pputils.h.

◆ CXXUTILS_PP_ARG5

#define CXXUTILS_PP_ARG5 ( ... ) __VA_OPT__(CXXUTILS_PP_ARG5_(__VA_ARGS__))

Definition at line 52 of file pputils.h.

◆ CXXUTILS_PP_ARG5_

#define CXXUTILS_PP_ARG5_	(	A,
		...
	)	CXXUTILS_PP_ARG4(__VA_ARGS__)

Definition at line 53 of file pputils.h.

◆ CXXUTILS_PP_FIFTH

#define CXXUTILS_PP_FIFTH ( ... ) CXXUTILS_PP_ARG5(__VA_ARGS__)

Definition at line 51 of file pputils.h.

◆ CXXUTILS_PP_FIRST

#define CXXUTILS_PP_FIRST ( ... ) CXXUTILS_PP_ARG1(__VA_ARGS__)

Definition at line 35 of file pputils.h.

◆ CXXUTILS_PP_FOURTH

#define CXXUTILS_PP_FOURTH ( ... ) CXXUTILS_PP_ARG4(__VA_ARGS__)

Definition at line 47 of file pputils.h.

◆ CXXUTILS_PP_SECOND

#define CXXUTILS_PP_SECOND ( ... ) CXXUTILS_PP_ARG2(__VA_ARGS__)

Definition at line 39 of file pputils.h.

◆ CXXUTILS_PP_THIRD

#define CXXUTILS_PP_THIRD ( ... ) CXXUTILS_PP_ARG3(__VA_ARGS__)

Definition at line 43 of file pputils.h.

Macros