05a2d17668
According to the standard [vector.capacity]/5, std::vector<T>::reserve shall throw an exception of type std::length_error when the requested capacity exceeds max_size(). This behavior is not implemented correctly: the function 'reserve' simply propagates the exception from allocator<T>::allocate. Before D110846 that exception used to be of type std::length_error (which is correct for vector<T>::reserve, but incorrect for allocator<T>::allocate). This patch fixes the issue and adds regression tests. Reviewed By: Quuxplusone, ldionne, #libc Differential Revision: https://reviews.llvm.org/D112068
80 lines
2.1 KiB
C++
80 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <vector>
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// vector<bool>
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// void reserve(size_type n);
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#include <vector>
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#include <cassert>
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#include "test_macros.h"
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#include "min_allocator.h"
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#include "test_allocator.h"
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int main(int, char**)
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{
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{
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std::vector<bool> v;
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v.reserve(10);
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assert(v.capacity() >= 10);
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}
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{
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std::vector<bool> v(100);
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assert(v.capacity() >= 100);
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v.reserve(50);
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assert(v.size() == 100);
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assert(v.capacity() >= 100);
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v.reserve(150);
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assert(v.size() == 100);
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assert(v.capacity() >= 150);
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}
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#if TEST_STD_VER >= 11
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{
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std::vector<bool, min_allocator<bool>> v;
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v.reserve(10);
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assert(v.capacity() >= 10);
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}
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{
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std::vector<bool, explicit_allocator<bool>> v;
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v.reserve(10);
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assert(v.capacity() >= 10);
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}
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{
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std::vector<bool, min_allocator<bool>> v(100);
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assert(v.capacity() >= 100);
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v.reserve(50);
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assert(v.size() == 100);
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assert(v.capacity() >= 100);
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v.reserve(150);
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assert(v.size() == 100);
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assert(v.capacity() >= 150);
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}
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#endif
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#ifndef TEST_HAS_NO_EXCEPTIONS
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{
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std::vector<bool, limited_allocator<bool, 10> > v;
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v.reserve(5);
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try {
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// A typical implementation would allocate chunks of bits.
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// In libc++ the chunk has the same size as the machine word. It is
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// reasonable to assume that in practice no implementation would use
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// 64 kB or larger chunks.
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v.reserve(10 * 65536);
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assert(false);
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} catch (const std::length_error&) {
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// no-op
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}
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assert(v.capacity() >= 5);
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}
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#endif
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return 0;
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}
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