State in the UAX31 profile description that a lone _ is not an identifier
#1129
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…tifier This is already what the Lexer rules block says.
matthiaskrgr
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Update books ## nomicon 1 commits in c05c452b36358821bf4122f9c418674edd1d713d..66d097d3d80e8f88c288c6879c7c2b909ecf8ad4 2021-12-13 15:23:48 +0900 to 2022-01-05 05:45:21 +0900 - Fix typo / type error in FFI code example (rust-lang/nomicon#327) ## reference 8 commits in f8ba2f12df60ee19b96de24ae5b73af3de8a446b..4dee6eb63d728ffb9e7a2ed443e9ada9275c69d2 2022-01-03 11:02:08 -0800 to 2022-01-18 09:26:33 -0800 - (minor) Remove Expression Path sub-types splits in Pattern specs (rust-lang/reference#1138) - Document destructuring assignment (rust-lang/reference#1116) - Document the 2021 edition changes to macros-by-example `pat` metavariables (rust-lang/reference#1135) - Improve the documentation of macros-by-example metavariable names (rust-lang/reference#1130) - trait-bounds.md: add pronoun 'that' (rust-lang/reference#1131) - Say that macros-by-example `ident` metavariables can match raw identifiers (rust-lang/reference#1133) - State in the UAX31 profile description that a lone `_` is not an identifier (rust-lang/reference#1129) - Document syntax reserved in Rust 2021 (rust-lang/reference#1128) ## book 17 commits in d3740fb7aad0ea4a80ae20f64dee3a8cfc0c5c3c..f17df27fc14696912c48b8b7a7a8fa49e648088d 2022-01-03 21:46:04 -0500 to 2022-01-18 17:46:28 -0500 - Add a notice to the top of all nostarch snapshots - Fix quotes - Grammar (minor): 'or' → 'and' for enum variants - Propagate edits of chapter 8 to src - Replies to nostarch edits - more edits - ch8 from nostarch - Fix grammar and line wrapping - Merge remote-tracking branch 'origin/pr/2880' - Remove wikipedia link - Merge remote-tracking branch 'origin/pr/2927' - Snapshot of ch14 for nostarch - Backport fixes to chapter 14 noticed while doing nostarch snapshot - Fix usage of find piped into xargs - Adjust some more line numbers of Cargo.toml includes - Merge branch '2909' - Merge remote-tracking branch 'parkerziegler/fix/ch14-add-one-naming' ## rustc-dev-guide 7 commits in 875464457c4104686faf667f47848aa7b0f0a744..78dd6a4684cf8d6b72275fab6d0429ea40b66338 2021-12-28 22:17:49 -0600 to 2022-01-18 14:44:26 -0300 - Reorganize and expand the testing chapters. (rust-lang/rustc-dev-guide#1281) - Add inline assembly internals (rust-lang/rustc-dev-guide#1266) - Spelling: Rename `rust` to `Rust` (rust-lang/rustc-dev-guide#1288) - Clean up section about FCPs (rust-lang/rustc-dev-guide#1287) - Address more review comments in rust-lang/rustc-dev-guide#1286. - Address review comments in rust-lang/rustc-dev-guide#1286. - Streamline "Getting Started" some more.
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This is following on from discussion in PR #1128.
UAX31 says an implementation that uses a variant of the default rules should
so I suppose this counts as such an additional constraint.