C + + three mesh operator pit

Wrote 7, 8 years of C + + code, the first time in the three-wood operator encountered a pit.

Pstrvalue = Probebind (pstrvalue)? Parsebind (Pstrvalue): Pstrvalue;

The type of the Parsebind return value is not the same as pstrvalue, and it is found that at the time of the operation, whether the Probebind function returns True or False,pstrvalue is converted to the return value type of the Parsebind, Then there is a temporary object that causes a bug to occur.

Solve the following problems in this way:

Pstrvalue = Probebind (pstrvalue)? Decltype (Pstrvalue) (Parsebind (Pstrvalue)): Pstrvalue;