rust/tests/ui/parser/issues/issue-87086-colon-path-sep.rs

// Tests that a suggestion is issued if the user wrote a colon instead of
// a path separator in a match arm.

mod qux {
    pub enum Foo {
        Bar,
        Baz,
    }
}

use qux::Foo;

fn f() -> Foo { Foo::Bar }

fn g1() {
    match f() {
        Foo:Bar => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
    match f() {
        qux::Foo:Bar => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
    match f() {
        qux:Foo::Baz => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
    match f() {
        qux: Foo::Baz if true => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
    if let Foo:Bar = f() {
    //~^ ERROR: expected one of
    //~| HELP: maybe write a path separator here
    }
}

fn g1_neg() {
    match f() {
        ref qux: Foo::Baz => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
}

fn g2_neg() {
    match f() {
        mut qux: Foo::Baz => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        _ => {}
    }
}

fn main() {
    let myfoo = Foo::Bar;
    match myfoo {
        Foo::Bar => {}
        Foo:Bar::Baz => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
        //~| ERROR: failed to resolve: `Bar` is a variant, not a module
    }
    match myfoo {
        Foo::Bar => {}
        Foo:Bar => {}
        //~^ ERROR: expected one of
        //~| HELP: maybe write a path separator here
    }
}