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Joshua Lehrer · Guest

Please consider the following sample code:

struct T {};

void func(const T&); //#1
void func(T&); //#2

T foo();

void test() {
func(foo());
}

Our old compiler compiled this code just fine, selecting func #1 from
the overload set.

Our new version of the same compiler fails to compile the code. It
complains that the initial value of a reference to non-const must be an
lvalue. As foo() is returning an rvalue, not an lvalue, it can't call
#2. But why can't it call #1?

I assume the new compiler is correct, but I don't understand why. Can
anyone explain further and perhaps reference The Holy Standard?

Thanks,

joshua lehrer
http://www.lehrerfamily.com/

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