std::pmr::monotonic_buffer_resource::monotonic_buffer_resource
STD：：PMR：单调[医]缓冲器[医]资源：：单调[医]缓冲器[医]资源
| monotonic_buffer_resource( | (1) | (since C++17) |
|---|---|---|
| explicit monotonic_buffer_resource(std::pmr::memory_resource* upstream | (2) | (since C++17) |
| explicit monotonic_buffer_resource(std::size_t initial_size | (3) | (since C++17) |
| monotonic_buffer_resource(std::size_t initial_size, std::pmr::memory_resource* upstream | (4) | (since C++17) |
| monotonic_buffer_resource(void* buffer, std::size_t buffer_size | (5) | (since C++17) |
| monotonic_buffer_resource(void* buffer, std::size_t buffer_size, std::pmr::memory_resource* upstream | (6) | (since C++17) |
| monotonic_buffer_resource(const monotonic_buffer_resource&) = delete; | (7) | (since C++17) |
构造一个monotonic_buffer_resource不接受上游内存资源指针的构造函数使用std::pmr::get_default_resource作为上游内存资源。
1-2%29设置电流缓冲器若为空，则为下一缓冲区大小到实现定义的大小。
3-4%29电流缓冲器若为空，则为下一缓冲区大小大小不小于initial_size...
5-6%29电流缓冲器到buffer而下一缓冲区大小到buffer_size%28但不少于1%29。然后增加下一缓冲区大小通过实现定义的增长因子%28，它不必是整数%29。
7%29复制构造函数被删除。
参数
| upstream | - | the upstream memory resource to use; must point to a valid memory resource |
|---|---|---|
| initial_size | - | the minimum size of the first buffer to allocate; must be greater than zero |
| buffer | - | the initial buffer to use |
| buffer_size | - | the size of the initial buffer; cannot be greater than the number of bytes in buffer |
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