c-resources/CPlusPlus20ForProgrammers-m.../examples/ch12/fig12_06/fig12_06.cpp

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// fig12_06.cpp
// Demonstrating standard new throwing bad_alloc when memory
// cannot be allocated.
#include <array>
#include <fmt/format.h>
#include <iostream>
#include <memory>
#include <new> // bad_alloc class is defined here
int main() {
std::array<std::unique_ptr<double[]>, 1000> items{};
// aim each unique_ptr at a big block of memory
try {
for (int i{0}; auto & item : items) {
item = std::make_unique<double[]>(500'000'000);
std::cout << fmt::format(
"items[{}] points to 500,000,000 doubles\n", i++);
}
}
catch (const std::bad_alloc& memoryAllocationException) {
std::cerr << fmt::format("Exception occurred: {}\n",
memoryAllocationException.what());
}
}
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