Initializing const value in c++ header with value returned by function

Question

Is there any way to define conastant foo in c++ header "foo.hpp"

const int foo;

and initialize it with value returned by function bar defined in "bar.hpp"

int bar();

? (Either in foo.hpp or in foo.cpp.)

You mean const int foo = bar();? Or am I missing something? — Mike Seymour
– Mike Seymour, Commented Oct 24, 2013 at 17:18
Why not a static const member? Global/namespace variables can be used, but I prefer static const cus you don't have to worry about extern. — IdeaHat
– IdeaHat, Commented Oct 24, 2013 at 17:24
@mike-seymour Not really. When doing like this I get compilation error: error: initializer element is not constant — user2643716
– user2643716, Commented Oct 24, 2013 at 17:26

sh03 · Accepted Answer · 2013-10-24 17:22:19Z

1

Write

extern const int foo;

in foo.hpp and

const int foo = bar();

in foo.cpp.

sh03

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answered Oct 24, 2013 at 17:20

Oswald

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Comments

sh03 · Accepted Answer · 2013-10-24 17:18:38Z

1

Of course there is:

// foo.hpp
const int foo = bar();

as you can see here it works just fine.

answered Oct 24, 2013 at 17:18

sh03

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