43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.14.0 -verify -Wno-vla %s
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// PR11925
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int n;
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int (&f())[n]; // expected-error {{function declaration cannot have variably modified type}}
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namespace PR18581 {
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template<typename T> struct pod {};
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template<typename T> struct error {
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typename T::error e; // expected-error {{cannot be used prior to '::'}}
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};
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struct incomplete; // expected-note {{forward declaration}}
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void f(int n) {
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pod<int> a[n];
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error<int> b[n]; // expected-note {{instantiation}}
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incomplete c[n]; // expected-error {{incomplete}}
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}
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}
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void pr23151(int (&)[*]) { // expected-error {{variable length array must be bound in function definition}}
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}
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void test_fold() {
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char a1[(unsigned long)(int *)0+1]{}; // expected-warning{{variable length array folded to constant array as an extension}}
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char a2[(unsigned long)(int *)0+1] = {}; // expected-warning{{variable length array folded to constant array as an extension}}
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char a3[(unsigned long)(int *)0+1];
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}
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// Demonstrate that the check for a static_assert-like use of VLA does not
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// crash when there's no array size expression at all.
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void test_null_array_size_expr() {
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int array1[]; // expected-error {{definition of variable with array type needs an explicit size or an initializer}}
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int array2[] = { 1, 2, 3 };
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}
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// Show that the check for a static_assert-like use of a VLA properly handles a
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// dependent array size expression.
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template <typename Ty>
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void func(int expr) {
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int array[sizeof(Ty) ? sizeof(Ty{}) : sizeof(int)];
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int old_style_assert[expr ? Ty::one : Ty::Neg_one]; // We don't diagnose as a VLA until instantiation
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}
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