Using a julia module inside function

[El Afrit Mariem]

Hi,

I was trying to use the Gaston module inside a function but I failed. I don't know if it's possible with Julia. If yes what is the correct syntax.

Thank you very much.

[Steven G. Johnson]

No, you are not allowed to have a "using" statement inside a function.

If you want to import a module but only use its symbols inside a specific function or set of functions, you have two options:

1) Use import:

import Foo

function bar(...)

    ... refer to Foo symbols via Foo.baz ...

end

    This loads the module Foo and defines a variable "Foo" that refers to the module, but does not import any of the other symbols from the module into the current namespace.  You refer to the Foo symbols by their qualified names Foo.bar etcetera.

2) Wrap your function in a module

module Bar

export bar

using Foo

function bar(...)

        ... refer to Foo.baz as simply baz ....

end 

end

using Bar

This imports all the symbols from Foo, but only inside the module Bar.

[Tony Fong]

Added to Lint.jl

[Peter Simon]

Added your useful answer to the FAQ in PR 7553

--Peter