Josh Triplett 63cfb3af37 mbe: Defer checks for compile_error! until reporting an unused macro rule ...

The MBE parser checks rules at initial parse time to see if their RHS
has `compile_error!` in it, and returns a list of rule indexes and LHS
spans that don't map to `compile_error!`, for use in unused macro rule
checking.

Instead, have the unused macro rule reporting ask the macro for the rule
to report, and let the macro check at that time. That avoids checking
rules unless they're unused.

In the process, refactor the data structure used to store macro rules,
to group the LHS and RHS (and LHS span) of each rule together, and
refactor the unused rule tracking to only track rule indexes.

This ends up being a net simplification, and reduction in code size.

2025-07-05 16:23:13 -07:00

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src

mbe: Defer checks for compile_error! until reporting an unused macro rule

2025-07-05 16:23:13 -07:00

Cargo.toml

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messages.ftl

Suggest use another lifetime specifier instead of underscore lifetime

2025-07-01 19:58:27 +08:00