 
                            C++ does not allow you to change the value of a reference type, effectively treating all references as being const qualified. The C++ Standard, [dcl.ref], paragraph 1 [ISO/IEC 14882-2014], states:
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                            C++ does not allow you to change the value of a reference type, effectively treating all references as being const qualified. The C++ Standard, [dcl.ref], paragraph 1 [ISO/IEC 14882-2014], states:
...