Quotes and continuous assignments, thank you!

格里弗斯

Does anyone help?

diamond52

According to the situation of this test (d = e), the return value does not seem to be a const temporary object. In theory, it should be. Is this something related to the compiler, waiting for expert advice?
up

珈蓝易拉罐

What compiler do you use?
Why even use VC2003 and g ++ to test your code, there are no problems, all three 98 (regardless of returning reference or non-reference).

zfy010317

Temporary variables say "temporary", which is the concept of time (scope) and does not specify what type it is.
It's just that built-in types, by default, are not addressable, and at the same time they cannot be modified. There is no exact type
Can represent this (non-addressable concept).

I feel that this code should be no problem, if any, it is all a matter of order of expressions.
But it stands to reason that it should be a = (b = c) first. It's just that the expressions of c ++ are sometimes really not common sense to explain.