emacs mode: ']', ')', and '}' close previous open paren/brace/bracket

[pnkfelix]

Here is the illustrative example:

fn foo() {
    { bar('}'); }
    { bar(']'); }
    { bar(')'); }
}

The characters within ' characters above are incorrectly treated by src/etc/rust-mode.el as closing the opening paren of the invocation of bar. This confuses Emacs in a number of ways (e.g. obviously paren matching; but also the auto-indentation gets confused too, which is more annoying).

[pnkfelix]

Blocks #8793

[pnkfelix]

probably strongly related to #10190, though I cannot tell for sure if this is a duplicate of that.

[shepmaster]

Using open braces instead is also a problem. This is the natural indenting for that:

fn foo() {
    { bar('{'); }
      { bar('['); }
        { bar('('); }
        }

I'd expect / hope that it's same root cause for both.

[steveklabnik]

Moved to rust-lang/rust-mode#6