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GCC implements -Wvla as "warn on every VLA" (this is useful to find every VLA, for example, if they are forbidden by coding guidelines). Currently Clang implements -Wvla as "warn on VLA when it is an extension". The attached patch makes our behavior match GCC. The existing vla extwarn is moved under -Wvla-extension and is still included into -Wgnu. This fixes PR5953. llvm-svn: 173286
27 lines
718 B
C++
27 lines
718 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -Wvla-extension %s
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struct StillPOD {
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StillPOD() = default;
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};
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struct StillPOD2 {
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StillPOD np;
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};
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struct NonPOD {
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NonPOD(int) {}
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};
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struct POD {
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int x;
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int y;
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};
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// We allow VLAs of POD types, only.
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void vla(int N) {
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int array1[N]; // expected-warning{{variable length arrays are a C99 feature}}
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POD array2[N]; // expected-warning{{variable length arrays are a C99 feature}}
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StillPOD array3[N]; // expected-warning{{variable length arrays are a C99 feature}}
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StillPOD2 array4[N][3]; // expected-warning{{variable length arrays are a C99 feature}}
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NonPOD array5[N]; // expected-error{{variable length array of non-POD element type 'NonPOD'}}
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}
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