std::experimental::pmr::monotonic_buffer_resource::monotonic_buffer_resource
From cppreference.com
                    
                                        
                    < cpp | experimental | monotonic buffer resource
                    
                                                            
                    | monotonic_buffer_resource(); | (1) | (library fundamentals TS) | 
| explicit monotonic_buffer_resource(memory_resource* upstream); | (2) | (library fundamentals TS) | 
| explicit monotonic_buffer_resource(std::size_t initial_size); | (3) | (library fundamentals TS) | 
| monotonic_buffer_resource(std::size_t initial_size, memory_resource* upstream); | (4) | (library fundamentals TS) | 
| monotonic_buffer_resource(void* buffer, std::size_t buffer_size); | (5) | (library fundamentals TS) | 
| monotonic_buffer_resource(void* buffer, std::size_t buffer_size, memory_resource* upstream); | (6) | (library fundamentals TS) | 
| monotonic_buffer_resource(const monotonic_buffer_resource&) = delete; | (7) | (library fundamentals TS) | 
Constructs a monotonic_buffer_resource. The constructors not taking a upstream memory resource pointer uses the return value of std::experimental::pmr::get_default_resource() as the upstream memory resource.
1-2) Sets the current buffer to null and the next buffer size to an implementation-defined size.
3-4) Sets the current buffer to null and the next buffer size to a size no smaller than 
initial_size.5-6) Sets the current buffer to 
buffer and the next buffer size to buffer_size (but not less than 1). Then increase the next buffer size by an implementation-defined growth factor (which does not have to be integral).7) Copy constructor is deleted.
[edit] Parameters
| 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 | 


