std::jmp_buf
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header  <csetjmp>
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|   typedef /* unspecified */ jmp_buf;  | 
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The std::jmp_buf type is an array type suitable for storing information to restore a calling environment. The stored information is sufficient to restore execution at the correct block of the program and invocation of that block. The state of floating-point status flags, or open files, or any other data is not stored in an object of type jmp_buf.
See also
|    saves the context   (function macro)  | |
|    jumps to specified location   (function)  |