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Merge #14651: Refactor: Fix compiler warning in prevector.h
76e13b586ff690dd3312f719f305c0d1021cd505 warnings: Compiler warning on memset usage for non-trivial type (Lenny Maiorani) Pull request description: Fixing warnings reported by GCC: memset of non-trivial type Tree-SHA512: 357aeac60acfb922851daaf0bd8d4b81e377da7c9b31c2942b54cfdd4129dae61e577fc0a6aa430348cb07abd16ae32f986a64dbb2c1d90ec148f53e7451a229
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@ -10,6 +10,7 @@
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#include <stdint.h>
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#include <string.h>
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#include <algorithm>
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#include <cstddef>
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#include <iterator>
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#include <type_traits>
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@ -198,22 +199,11 @@ private:
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const T* item_ptr(difference_type pos) const { return is_direct() ? direct_ptr(pos) : indirect_ptr(pos); }
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void fill(T* dst, ptrdiff_t count) {
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if (IS_TRIVIALLY_CONSTRUCTIBLE<T>::value) {
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// The most common use of prevector is where T=unsigned char. For
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// trivially constructible types, we can use memset() to avoid
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// looping.
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::memset(dst, 0, count * sizeof(T));
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} else {
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for (auto i = 0; i < count; ++i) {
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new(static_cast<void*>(dst + i)) T();
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}
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}
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std::fill_n(dst, count, T{});
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}
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void fill(T* dst, ptrdiff_t count, const T& value) {
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for (auto i = 0; i < count; ++i) {
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new(static_cast<void*>(dst + i)) T(value);
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}
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std::fill_n(dst, count, value);
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}
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template<typename InputIterator>
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