Ping: https://gcc.gnu.org/ml/gcc-patches/2019-08/msg01007.html
On Wed, Aug 14, 2019, at 8:22 PM, Eduard-Mihai Burtescu wrote: > Previously, rust-demangle.c was special-casing a fixed number > of '$uXY$' escapes, but 'XY' can technically be any hex value, > representing some Unicode codepoint. > > This patch adds more general support for '$u...$' escapes, > similar to https://github.com/alexcrichton/rustc-demangle/pull/29, > but only for the the ASCII subset. More complete Unicode support > may come at a later time, but right now I want to keep it simple. > > Escapes that decode to ASCII control codes are considered invalid, > as the Rust compiler should never emit them, and to avoid any > undesirable effects from accidentally outputting a control code. > > Additionally, the switch statements, which had one case for each > alphanumeric character, were replaced with if-else chains. > > Bootstrapped and tested on x86_64-unknown-linux-gnu. > > 2019-08-14 Eduard-Mihai Burtescu <ed...@lyken.rs> > libiberty/ChangeLog: > * rust-demangle.c (unescape): Remove. > (parse_lower_hex_nibble): New function. > (parse_legacy_escape): New function. > (is_prefixed_hash): Use parse_lower_hex_nibble. > (looks_like_rust): Use parse_legacy_escape. > (rust_demangle_sym): Use parse_legacy_escape. > * testsuite/rust-demangle-expected: Add 'llv$u6d$' test.
