116 lines
3.4 KiB
C
116 lines
3.4 KiB
C
#include <stdio.h>
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const int a = 0;
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struct a {
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int a;
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};
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struct b {
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int a;
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};
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int a_f()
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{
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return 20;
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}
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int b_f()
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{
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return 10;
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}
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typedef int (*fptr)(int);
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int foo(int i)
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{
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return i;
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}
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typedef int int_type1;
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#define gen_sw(a) _Generic(a, const char *: 1, default: 8, int: 123);
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int main()
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{
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int i = 0;
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signed long int l = 2;
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struct b titi;
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const int * const ptr;
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const char *ti;
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int_type1 i2;
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i = _Generic(a, int: a_f, const int: b_f)();
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printf("%d\n", i);
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i = _Generic(a, int: a_f() / 2, const int: b_f() / 2);
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printf("%d\n", i);
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i = _Generic(ptr, int *:1, int * const:2, default:20);
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printf("%d\n", i);
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i = gen_sw(a);
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printf("%d\n", i);
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i = _Generic(titi, struct a:1, struct b:2, default:20);
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printf("%d\n", i);
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i = _Generic(i2, char: 1, int : 0);
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printf("%d\n", i);
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i = _Generic(a, char:1, int[4]:2, default:5);
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printf("%d\n", i);
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i = _Generic(17, int :1, int **:2);
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printf("%d\n", i);
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i = _Generic(17L, int :1, long :2, long long : 3);
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printf("%d\n", i);
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i = _Generic("17, io", char *: 3, const char *: 1);
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printf("%d\n", i);
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i = _Generic(ti, const unsigned char *:1, const char *:4, char *:3,
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const signed char *:2);
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printf("%d\n", i);
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printf("%s\n", _Generic(i + 2L, long: "long", int: "int",
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long long: "long long"));
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i = _Generic(l, long: 1, int: 2);
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printf("%d\n", i);
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i = _Generic(foo, fptr: 3, int: 4);
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printf("%d\n", i);
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(void)_Generic((int(*)[2]){0}, int(*)[2]:0, int(*)[4]:0); //shouldn't match twice
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//should accept ({ }) in the controlling expr of _Generic even in const_wanted contexts
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struct { _Bool x_0: _Generic(({0;}),default:1); } my_x;
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_Generic((__typeof((float const)((float const){42}))*){0}, float*: 0); //casts lose top-level qualifiers
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int const x = 42; __typeof((__typeof(x))x) *xp = 0; (void)_Generic(xp, int*: 0); //casts lose top-level qualifiers
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//TEST TERNARY:
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//Same type
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_Generic( 0?(long*)0:(long*)0, long*: (void)0);
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//combining of qualifiers
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_Generic( 0?(long volatile*)0:(long const*)0, long const volatile*: (void)0);
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//nul-ptr constant selects other type
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_Generic( 0?(long*)0:0, long*: (void)0);
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_Generic( 0?(long*)0:(void*)0, long*: (void)0);
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//void ptrs get chosen preferentially; qualifs still combine
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_Generic( 0?(int volatile*)0: (void const*)1, void volatile const*: (void)0);
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//like gcc but not clang, don't treat (void* const as the null-ptr constant)
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_Generic( 0?(int volatile*)0: (void const*)0, void volatile const*: (void)0);
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//ptrs to incomplete types get completed
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[4])0 : (int (*)[])0, int (*)[4]:+1, int (*)[5]:(void)0); }));
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[])0 : (int (*)[4])0, int (*)[4]:+1, int (*)[5]:(void)0); }));
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{
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/* completion shouldn't affect the type of decl */
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char **argv;
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_Generic(argv, char**: (void)0);
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_Generic(0?(char const*)0:argv[0], char const*: (void)0);
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_Generic(argv, char**: (void)0);
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}
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{
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extern int (*ar)[];
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[4])0 : (int (*)[])0, int (*)[4]:+1, int (*)[5]:(void)0); }));
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[])0 : (int (*)[4])0, int (*)[4]:+1, int (*)[5]:(void)0); }));
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(void)(sizeof(struct { int x:_Generic( 0?ar : (int (*)[4])0, int (*)[4]:+1, int (*)[5]:(void)0); }));
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[4])0 : ar, int (*)[4]:+1, int (*)[5]:(void)0); }));
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(void)(sizeof(struct { int x:_Generic( 0?(int (*)[5])0 : ar, int (*)[5]:+1, int (*)[4]:(void)0); }));
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}
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return 0;
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}
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