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Simplify macro expansion with recursion (#21859)

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This commit is contained in:
Scott Lahteine
2021-05-11 08:30:16 -05:00
committed by GitHub
parent 0264316797
commit e5dc2c5321
3 changed files with 51 additions and 153 deletions
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36
Marlin/src/core/macros.h
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@@ -301,8 +301,12 @@
#define HYPOT(x,y) SQRT(HYPOT2(x,y))
// Use NUM_ARGS(__VA_ARGS__) to get the number of variadic arguments
#define _NUM_ARGS(_,Z,Y,X,W,V,U,T,S,R,Q,P,O,N,M,L,K,J,I,H,G,F,E,D,C,B,A,OUT,...) OUT
#define NUM_ARGS(V...) _NUM_ARGS(0,V,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
#define _NUM_ARGS(_,n,m,l,k,j,i,h,g,f,e,d,c,b,a,Z,Y,X,W,V,U,T,S,R,Q,P,O,N,M,L,K,J,I,H,G,F,E,D,C,B,A,OUT,...) OUT
#define NUM_ARGS(V...) _NUM_ARGS(0,V,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,20,19,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0)
// Use TWO_ARGS(__VA_ARGS__) to get whether there are 1, 2, or >2 arguments
#define _TWO_ARGS(_,n,m,l,k,j,i,h,g,f,e,d,c,b,a,Z,Y,X,W,V,U,T,S,R,Q,P,O,N,M,L,K,J,I,H,G,F,E,D,C,B,A,OUT,...) OUT
#define TWO_ARGS(V...) _TWO_ARGS(0,V,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,2,1,0)
#ifdef __cplusplus
@@ -414,31 +418,19 @@
#else
#define MIN_2(a,b) ((a)<(b)?(a):(b))
#define MIN_3(a,V...) MIN_2(a,MIN_2(V))
#define MIN_4(a,V...) MIN_2(a,MIN_3(V))
#define MIN_5(a,V...) MIN_2(a,MIN_4(V))
#define MIN_6(a,V...) MIN_2(a,MIN_5(V))
#define MIN_7(a,V...) MIN_2(a,MIN_6(V))
#define MIN_8(a,V...) MIN_2(a,MIN_7(V))
#define MIN_9(a,V...) MIN_2(a,MIN_8(V))
#define MIN_10(a,V...) MIN_2(a,MIN_9(V))
#define __MIN_N(N,V...) MIN_##N(V)
#define _MIN_N(N,V...) __MIN_N(N,V)
#define _MIN(V...) _MIN_N(NUM_ARGS(V), V)
#define _MIN_N_REF() _MIN_N
#define _MIN(V...) EVAL(_MIN_N(TWO_ARGS(V),V))
#define MIN_2(a,b) ((a)<(b)?(a):(b))
#define MIN_3(a,V...) MIN_2(a,DEFER2(_MIN_N_REF)()(TWO_ARGS(V),V))
#define MAX_2(a,b) ((a)>(b)?(a):(b))
#define MAX_3(a,V...) MAX_2(a,MAX_2(V))
#define MAX_4(a,V...) MAX_2(a,MAX_3(V))
#define MAX_5(a,V...) MAX_2(a,MAX_4(V))
#define MAX_6(a,V...) MAX_2(a,MAX_5(V))
#define MAX_7(a,V...) MAX_2(a,MAX_6(V))
#define MAX_8(a,V...) MAX_2(a,MAX_7(V))
#define MAX_9(a,V...) MAX_2(a,MAX_8(V))
#define MAX_10(a,V...) MAX_2(a,MAX_9(V))
#define __MAX_N(N,V...) MAX_##N(V)
#define _MAX_N(N,V...) __MAX_N(N,V)
#define _MAX(V...) _MAX_N(NUM_ARGS(V), V)
#define _MAX_N_REF() _MAX_N
#define _MAX(V...) EVAL(_MAX_N(TWO_ARGS(V),V))
#define MAX_2(a,b) ((a)>(b)?(a):(b))
#define MAX_3(a,V...) MAX_2(a,DEFER2(_MAX_N_REF)()(TWO_ARGS(V),V))
#endif