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🧑‍💻 More robust TERN_ macro

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Scott Lahteine 2025-03-27 02:25:43 -05:00
parent dda42fb599
commit ac5fa61de5
1 changed files with 8 additions and 4 deletions
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12
Marlin/src/core/macros.h
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@ -206,19 +206,23 @@
#define TERN(O,A,B) _TERN(_ENA_1(O),B,A) // OPTION ? 'A' : 'B'
#define TERN0(O,A) _TERN(_ENA_1(O),0,A) // OPTION ? 'A' : '0'
#define TERN1(O,A) _TERN(_ENA_1(O),1,A) // OPTION ? 'A' : '1'
#define TERN_(O,A) _TERN(_ENA_1(O),,A) // OPTION ? 'A' : '<nul>'
#define _TERN(E,V...) __TERN(_CAT(T_,E),V) // Prepend 'T_' to get 'T_0' or 'T_1'
#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 IF_DISABLED(O,A) TERN(O,,A)
// "Ternary" that emits or omits the given content
#define EMIT(V...) V
#define OMIT(...)
#define TERN_(O,A) _TERN(_ENA_1(O),OMIT,EMIT)(A) // OPTION ? 'A' : '<nul>'
// Macros to conditionally emit array items and function arguments
#define _OPTITEM(A...) A,
#define OPTITEM(O,A...) TERN_(O,DEFER4(_OPTITEM)(A))
#define OPTITEM(O,A...) TERN_(O,DEFER(_OPTITEM)(A))
#define _OPTARG(A...) , A
#define OPTARG(O,A...) TERN_(O,DEFER4(_OPTARG)(A))
#define OPTARG(O,A...) TERN_(O,DEFER(_OPTARG)(A))
#define _OPTCODE(A) A;
#define OPTCODE(O,A) TERN_(O,DEFER4(_OPTCODE)(A))
#define OPTCODE(O,A) TERN_(O,DEFER(_OPTCODE)(A))
// Macros to avoid operations that aren't always optimized away (e.g., 'f + 0.0' and 'f * 1.0').
// Compiler flags -fno-signed-zeros -ffinite-math-only also cover 'f * 1.0', 'f - f', etc.