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Add FOREACH variants for nesting to ppmpl

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Three levels of nesting are enough for anyone!
This commit is contained in:
Christian Thaeter 2008-09-14 11:15:30 +02:00
parent 973348fdb8
commit 4d65f0394d
1 changed files with 65 additions and 0 deletions
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65
src/lib/ppmpl.h
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@ -46,6 +46,10 @@
*
* Would expand to the sequence:
* {1, 2, 3, -1}
*
* One can not recursively nest preprocessor macros. To allow this we define PPMPL_FOREACH_L1
* to PPMPL_FOREACH_L2 with the same semantics as PPMPL_FOREACH, This allowes to nest the
* FOREACH loop up to three nesting levels.
*/
#define PPMPL_FOREACH(p, ...) PPMPL_FOREACH0(p, __VA_ARGS__, PPMPL_FOREACH_NIL))
@ -74,6 +78,67 @@
#define PPMPL_FOREACH_P2_PPMPL_FOREACH_NIL PPMPL_FOREACH_FINAL(
#define PPMPL_FOREACH_FINAL(...)
#define PPMPL_FOREACH_L1(p, ...) PPMPL_FOREACH_L1_0(p, __VA_ARGS__, PPMPL_FOREACH_L1_NIL))
/* internal */
#define PPMPL_FOREACH_L1_0(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_1(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_1(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_2(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_2(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_3(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_3(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_4(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_4(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_5(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_5(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_6(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_6(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_7(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_7(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_8(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_8(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_9(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_9(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_10(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_10(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_11(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_11(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_12(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_12(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_13(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_13(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_14(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_14(p, h, ...) PPMPL_FOREACH_L1##p##h PPMPL_FOREACH_L1_15(p, __VA_ARGS__)
#define PPMPL_FOREACH_L1_15(p, h, ...) PPMPL_FOREACH_L1##p##h
#define PPMPL_FOREACH_L1_
#define PPMPL_FOREACH_L1_P1_
#define PPMPL_FOREACH_L1_P2_
#define PPMPL_FOREACH_L1_PPMPL_FOREACH_L1_NIL PPMPL_FOREACH_L1_FINAL(
#define PPMPL_FOREACH_L1_P1_PPMPL_FOREACH_L1_NIL PPMPL_FOREACH_L1_FINAL(
#define PPMPL_FOREACH_L1_P2_PPMPL_FOREACH_L1_NIL PPMPL_FOREACH_L1_FINAL(
#define PPMPL_FOREACH_L1_FINAL(...)
#define PPMPL_FOREACH_L2(p, ...) PPMPL_FOREACH_L2_0(p, __VA_ARGS__, PPMPL_FOREACH_L2_NIL))
/* internal */
#define PPMPL_FOREACH_L2_0(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_1(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_1(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_2(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_2(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_3(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_3(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_4(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_4(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_5(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_5(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_6(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_6(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_7(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_7(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_8(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_8(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_9(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_9(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_10(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_10(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_11(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_11(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_12(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_12(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_13(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_13(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_14(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_14(p, h, ...) PPMPL_FOREACH_L2##p##h PPMPL_FOREACH_L2_15(p, __VA_ARGS__)
#define PPMPL_FOREACH_L2_15(p, h, ...) PPMPL_FOREACH_L2##p##h
#define PPMPL_FOREACH_L2_
#define PPMPL_FOREACH_L2_P1_
#define PPMPL_FOREACH_L2_P2_
#define PPMPL_FOREACH_L2_PPMPL_FOREACH_L2_NIL PPMPL_FOREACH_L2_FINAL(
#define PPMPL_FOREACH_L2_P1_PPMPL_FOREACH_L2_NIL PPMPL_FOREACH_L2_FINAL(
#define PPMPL_FOREACH_L2_P2_PPMPL_FOREACH_L2_NIL PPMPL_FOREACH_L2_FINAL(
#define PPMPL_FOREACH_L2_FINAL(...)
#endif
/*
// Local Variables: