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🎨 Macros for optional arguments (#21969)

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This commit is contained in:
Scott Lahteine
2021-05-23 21:33:22 -05:00
committed by Scott Lahteine
parent 61f2bb1228
commit e75c3b6c54
28 changed files with 120 additions and 351 deletions
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5
Marlin/src/core/macros.h
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@ -195,6 +195,11 @@
#define __TERN(T,V...) ___TERN(_CAT(_NO,T),V) // Prepend '_NO' to get '_NOT_0' or '_NOT_1'
#define ___TERN(P,V...) THIRD(P,V) // If first argument has a comma, A. Else B.
#define _OPTARG(A) , A
#define OPTARG(O,A) TERN_(O,DEFER4(_OPTARG)(A))
#define _OPTCODE(A) A;
#define OPTCODE(O,A) TERN_(O,DEFER4(_OPTCODE)(A))
// Macros to avoid 'f + 0.0' which is not always optimized away. Minus included for symmetry.
// Compiler flags -fno-signed-zeros -ffinite-math-only also cover 'f * 1.0', 'f - f', etc.
#define PLUS_TERN0(O,A) _TERN(_ENA_1(O),,+ (A)) // OPTION ? '+ (A)' : '<nul>'