Eagerly check for ambiguity in macro parsing#158976

Merged

rust-bors[bot] merged 11 commits into

rust-lang:mainfrom

bal-e:eager-ambig-detection

Jul 15, 2026

Commits on Jul 12, 2026

Progress the parser in `parse_tt_inner()`
arya dradjica
committed
Add `&[MatcherLoc]` to `Tracker::prepare()`
arya dradjica
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Record `{next,bb}_mps` indirectly in `Tracker`
arya dradjica
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Remove `{bb,next}_locs` params to `Tracker::ambiguity()`
arya dradjica
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Eagerly check for ambiguity when a meta-variable is found
arya dradjica
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Inline non-terminal parsing into `match_one()`
arya dradjica
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Remove `bb_mps`
arya dradjica
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Use `check_for_ambiguity()` for `MatcherLoc::Eof`
arya dradjica
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Factor out some ambiguity-checking boilerplate
arya dradjica
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Inline `TtParser::ambiguity_error()`
arya dradjica
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Build ambiguity errors inside `check_for_ambiguity()`
arya dradjica
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