[Bug rust/23427] New: implement raw identifiers

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23427

Bug ID: 23427
Summary: implement raw identifiers
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: rust
Assignee: unassigned at sourceware dot org
Reporter: tromey at sourceware dot org
Target Milestone: ---

Rust is adding raw identifiers in the 2018 edition:

https://rust-lang-nursery.github.io/edition-guide/2018/transitioning/raw-identifiers.html

The gdb lexer should implement this as well.