derek.holloway
7502bf64a4
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55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
// RUN: %clang_cc1 -std=c23 -verify -triple x86_64 -pedantic -Wno-conversion -Wno-constant-conversion -Wno-div-by-zero %s
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// RUN: %clang_cc1 -std=c23 -verify -triple x86_64 -pedantic -Wno-conversion -Wno-constant-conversion -Wno-div-by-zero -fexperimental-new-constant-interpreter %s
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#define comptime_if(predicate, on_true, on_false) \
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_Generic((char (*)[1 + !!(predicate)]){0}, \
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char (*)[2]: (on_true), \
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char (*)[1]: (on_false))
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enum E { E_A = 0, E_B = 1 };
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union U {
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int a;
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char b;
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};
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struct S1 {
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int a;
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};
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struct S2 {
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int a;
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int b;
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_Bool c;
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char d;
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enum E e;
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struct S1 f;
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double g;
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int h;
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};
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constexpr struct S2 V1 = {0, 1, 1, 'c', E_B, {3}, 1.0, -1};
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constexpr union U V2 = {5};
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constexpr int V3 = V1.f.a;
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constexpr int V4 = ((struct S2){0, 4, 0, 0, E_A, {6}, 0.0, 0}).f.a;
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void gh178349() {
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int a[V1.b] = {};
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int b[V1.g] = {}; // expected-error {{size of array has non-integer type 'double'}}
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int c[V1.h] = {}; // expected-error {{'c' declared as an array with a negative size}}
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const struct S2 *P1 = &V1;
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_Static_assert(P1->b, ""); // expected-error {{static assertion expression is not an integral constant expression}}
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_Static_assert(V1.b, "");
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_Static_assert(comptime_if(V1.a, 1, 0) == 0, "");
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_Static_assert(comptime_if(V1.a, 0, 1) == 1, "");
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_Static_assert(comptime_if(V2.a, 1, 0) == 1, "");
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_Static_assert(V1.c, "");
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_Static_assert(V1.d == 'c', "");
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_Static_assert(V1.e == E_B, "");
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_Static_assert(V1.f.a == 3, "");
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_Static_assert(V2.a == 5, "");
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_Static_assert(V3 == 3, "");
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_Static_assert(V4 == 6, "");
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}
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