97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
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// RUN: %clang_cc1 -verify -std=c2x %s
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/* WG14 N2927: yes
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* Not-so-magic: typeof
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*/
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// These examples originated in WG14 N2927 but were modified to test particular
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// compiler behaviors. Each of these examples come from C2x 6.7.2.5.
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// EXAMPLE 1
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typeof(1 + 1) func();
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int func();
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// EXAMPLE 2
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const _Atomic int purr = 0;
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const int meow = 1;
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const char *const mew[] = {
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"aardvark",
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"bluejay",
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"catte",
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};
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extern typeof_unqual(purr) plain_purr;
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extern int plain_purr;
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extern typeof(_Atomic typeof(meow)) atomic_meow;
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extern const _Atomic int atomic_meow;
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extern typeof(mew) mew_array;
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extern const char *const mew_array[3];
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extern typeof_unqual(mew) mew2_array;
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extern const char *mew2_array[3];
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// EXAMPLE 3
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void foo(int argc, char *argv[]) { // expected-note 2 {{declared here}}
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_Static_assert(sizeof(typeof('p')) == sizeof(int));
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_Static_assert(sizeof(typeof('p')) == sizeof('p'));
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_Static_assert(sizeof(typeof((char)'p')) == sizeof(char));
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_Static_assert(sizeof(typeof((char)'p')) == sizeof((char)'p'));
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_Static_assert(sizeof(typeof("meow")) == sizeof(char[5]));
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_Static_assert(sizeof(typeof("meow")) == sizeof("meow"));
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_Static_assert(sizeof(typeof(argc)) == sizeof(int));
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_Static_assert(sizeof(typeof(argc)) == sizeof(argc));
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_Static_assert(sizeof(typeof(argv)) == sizeof(char**));
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_Static_assert(sizeof(typeof(argv)) == sizeof(argv)); // expected-warning {{sizeof on array function parameter will return size of 'char **' instead of 'char *[]'}}
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_Static_assert(sizeof(typeof_unqual('p')) == sizeof(int));
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_Static_assert(sizeof(typeof_unqual('p')) == sizeof('p'));
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_Static_assert(sizeof(typeof_unqual((char)'p')) == sizeof(char));
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_Static_assert(sizeof(typeof_unqual((char)'p')) == sizeof((char)'p'));
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_Static_assert(sizeof(typeof_unqual("meow")) == sizeof(char[5]));
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_Static_assert(sizeof(typeof_unqual("meow")) == sizeof("meow"));
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_Static_assert(sizeof(typeof_unqual(argc)) == sizeof(int));
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_Static_assert(sizeof(typeof_unqual(argc)) == sizeof(argc));
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_Static_assert(sizeof(typeof_unqual(argv)) == sizeof(char**));
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_Static_assert(sizeof(typeof_unqual(argv)) == sizeof(argv)); // expected-warning {{sizeof on array function parameter will return size of 'char **' instead of 'char *[]'}}
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}
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// EXAMPLE 4
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void bar(int argc) {
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extern int val;
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extern typeof(typeof_unqual(typeof(argc)))val;
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}
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// EXAMPLE 5 is tested by n2927_2.c because it is a codegen test.
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// EXAMPLE 6
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extern const char *y[4];
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extern typeof(typeof(const char*)[4]) y;
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// EXAMPLE 7
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void f(int);
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void g(double);
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typeof(f(5)) g(double x); // g has type "void(double)"
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extern void (*h)(double);
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extern typeof(g)* h; // h has type "void(*)(double)"
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extern typeof(true ? g : 0) h; // h has type "void(*)(double)"
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void j(double *, double **);
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void j(double A[5], typeof(A)* B); // j has type "void(double*, double**)"
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extern typeof(double[]) D; // D has an incomplete type
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extern double C[2];
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extern typeof(D) C; // C has type "double[2]"
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typeof(D) D = { 5, 8.9, 0.1, 99 }; // D is now completed to "double[4]"
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extern double E[4];
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extern typeof(D) E; // E has type "double[4]" from D<>s completed type
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// GH64713 -- this used to trigger an infinite loop when creating the function
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// declaration for F from the function designator specified by typeof.
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typeof(int(int)) F; // F has type "int(int)"
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