Lambda return of value without capture

Asked Dec 18 '16 at 17:08

Active Dec 18 '16 at 17:21

Viewed 69 times

The following program compiles on gcc and icc, but fails to compile on VS and clang:

template <typename Y>
auto add_value(Y y)
{
    const short z{9};
    return [y](auto x)
    {
        return z;
    };
}

int main()
{
    add_value(2);
}

Flags were: -std=c++14 -O2 -Wall -Wshadow -pedantic -pthread

Which is correct? I suppose gcc is correct here? But I would prefer for this to fail.

edited May 23 '17 at 12:30

Community

asked Dec 18 '16 at 17:08

wally

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1

You can paste the link to the *godbolt* instead of screenshot. – Edgar Rokjān Dec 18 '16 at 17:12
1

clang compiles it if you change it to `static const z{9};` is it an ODR-use issue? – Richard Hodges Dec 18 '16 at 17:15
Yes, seems like an ODR issue. – wally Dec 18 '16 at 17:21
1

clang compiles it if you change `return z;` to `return +z;`, or if you explicitly specify the return type of the lambda. – cpplearner Dec 18 '16 at 17:24

Lambda return of value without capture

0 Answers0