Resolve grammar rules in link reference definitions#2198
Merged
Conversation
Currently, in our Markdown, we support `[text][RULE_NAME]` and `[text][grammar-RULE_NAME]` for linking to grammar rules, but we don't support this syntax within link reference definitions, i.e., `[text]: grammar-RULE_NAME`, even though we do support linking to (non-grammar) rule identifiers within link reference definitions. That's an inconsistency that continually surprises us. Let's fix that. In this commit, we add `grammar_link_references`, which scans link reference definitions for destinations that match a grammar rule name -- either with a `grammar-` prefix or not. When a match is found, the destination is replaced with the resolved path and anchor, just as `rule_link_references` does for rules. Unrecognized destinations pass through unchanged, falling through to `std_links` for rustdoc resolution -- the same behavior as unresolved `[text][NAME]` reference links. We also update the dev-guide to document the new feature in both `links.md` and `grammar.md`.
rustbot
added
the
S-waiting-on-review
Draft
ehuss
approved these changes
Mar 4, 2026
rustbot
removed
the
S-waiting-on-review
JonathanBrouwer
added a commit
to JonathanBrouwer/rust
that referenced
this pull request
Mar 9, 2026
Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
matthiaskrgr
added a commit
to matthiaskrgr/rust
that referenced
this pull request
Mar 9, 2026
Update books ## rust-embedded/book 4 commits in 99d0341ff4e06757490af8fceee790c4ede50bc0..e88aa4403b4bf2071c8df9509160477e40179099 2026-02-28 20:13:44 UTC to 2026-02-28 20:07:25 UTC - Clarify that a mini usb cable is used on the STM32F3DISCOVERY (rust-embedded/book#381) - Update outdated qemu documentation (rust-embedded/book#403) - Add TRACE32 to Debuggers section (rust-embedded/book#406) - Add a link to Rust for Zephyr (rust-embedded/book#407) ## rust-lang/nomicon 4 commits in b8f254a991b8b7e8f704527f0d4f343a4697dfa9..cc6a6bae8c3bfa389974e533c54694662c1a9de6 2026-02-27 23:27:18 UTC to 2026-02-26 22:57:03 UTC - Fix `Vec::push_all` ptr code in exception-safety (rust-lang/nomicon#418) - Clarify parameter and argument compatibility (rust-lang/nomicon#516) - Improve grammar in Variance section (rust-lang/nomicon#515) - Explicit `extern "C"` ABI for FFI (rust-lang/nomicon#520) ## rust-lang/reference 7 commits in 50a1075e879be75aeec436252c84eef0fad489f4..c49e89cc8c7c2c43ca625a8d5b7ad9a53a9ce978 2026-03-04 15:39:00 UTC to 2026-03-01 06:34:18 UTC - Resolve grammar rules in link reference definitions (rust-lang/reference#2198) - Support non-ASCII Unicode in grammar rule names (rust-lang/reference#2196) - Fix grammar for block comments (rust-lang/reference#2191) - Fix an EN grammar error & add an item to place expr context list (rust-lang/reference#2189) - Align attribute template with applied conventions (rust-lang/reference#2194) - Update shebang (rust-lang/reference#2192) - Remove RESERVED_NUMBER (rust-lang/reference#2193)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Currently, in our Markdown, we support
[text][RULE_NAME]and[text][grammar-RULE_NAME]for linking to grammar rules, but we don't support this syntax within link reference definitions, i.e.,[text]: grammar-RULE_NAME, even though we do support linking to (non-grammar) rule identifiers within link reference definitions. That's an inconsistency that continually surprises us. Let's fix that.In this commit, we add
grammar_link_references, which scans link reference definitions for destinations that match a grammar rule name -- either with agrammar-prefix or not. When a match is found, the destination is replaced with the resolved path and anchor, just asrule_link_referencesdoes for rules. Unrecognized destinations pass through unchanged, falling through tostd_linksfor rustdoc resolution -- the same behavior as unresolved[text][NAME]reference links.We also update the dev-guide to document the new feature in both
links.mdandgrammar.md.cc @ehuss