static extern inside a type loses static #3515

Issue created from fantomas-online

Code

type T =
    static extern int F(int x)

Result

type T =
    extern int F(int x)

Problem description

Inside a type, static extern loses its static: the result parses, but it is a different declaration, since the syntax tree's static flag goes from true to false.

The attribute does not matter: [<DllImport("user32.dll")>] above the member gives the same result, and so does a type with members besides the extern.

Fails on 8.0.6, 7.0.5 and main. #1214 was about an extern inside a type too, and is closed.

Found while writing a snapshot case for MemberDefn.ExternBinding in #3512.

Extra information

• The formatted result breaks my code.
• The formatted result gives compiler warnings.
• I or my company would be willing to help fix this.
• I would like a release if this problem is solved.

Options

Fantomas main branch at 2026-10-02T18:44:31Z - 8bf81a1

Default Fantomas configuration

_{Did you know that you can ignore files when formatting by using a .fantomasignore file?
PS: It's unlikely that someone else will solve your specific issue, as it's something that you have a personal stake in.}