9f145022ef
`char_lit` uses an allocation in order to ignore '_' chars in \u{...}
literals. This patch changes it to not do that by processing the chars
more directly.
This improves various rustc-perf benchmark measurements by up to 6%,
particularly regex, futures, clap, coercions, hyper, and encoding.
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|---|---|---|
| .. | ||
| lexer | ||
| attr.rs | ||
| classify.rs | ||
| common.rs | ||
| mod.rs | ||
| parser.rs | ||
| token.rs | ||