Highlight the question mark operator to ease code review

[koutheir]

When reviewing Rust code, spotting the question mark operator ? is very important in order to form a picture of the possible code paths and return points. Could you please provide an option to highlight the question mark operator in some pretty obvious color, and maybe make it bold or underlined.

[Xanewok]

That'd require changing and shipping the Rust grammar ourselves. Currently it's shipped with VSCode (which itself is borrowed from Atom, it seems).

[p-avital]

Could be done without changing the grammar, at some performance cost though:
Using decorations to highlight the question marks.

Maybe making a command Find return points which would parse the file for return statements and highlight them with decorations?