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3 Commits
Author SHA1 Message Date
Lucile Rose Nihlen 1579d4ec7e Fix canonicalization and simplify default value patterns. (#7837) 
Removes support for unspecified default values. Fixes canonicalization
of the `DefaultValuePattern` instruction by making them immutable after
they are issued, and by removing the `DefaultValueId` operand which
wasn't being canonicalized.
 2026-09-25 22:59:55 +00:00
Lucile Rose Nihlen 2952ec9c10 Fix a crash when checking a nested tuple-pattern (#7716) 
Adds a virtual node to `DefaultValuePattern` to end the
`ExprRegionForPattern` before checking the expression
for the default value.

When checking the default value expression, the context
was still configured to interpret expressions as patterns,
which caused some corruption of state with tuple-pattern
subpatterns.

Corrects an assertion failure I found while working on
feedback from #7665.
 2026-09-04 01:22:16 +00:00
Lucile Rose Nihlen 91c1e1049d Add parsing of default value exprs in pattern lists (#7631) 
Adds parsing support only for default value expressions in pattern
lists, including leaving the default value unspecified with an
underscore `_`.

Per #7521.
 2026-09-01 01:19:13 +00:00