WIP: v0.19 advanced type system #1507

Generated from source commit 1352ed3958 (source changes verified before committing).

Validated sequential rebootstrap, boot-clean, stage0, stage1, stdlib and tools with eight build cores. Post-rebuild: 21 focused control/return-inference/nullable cases passed, plus the separately compiled nine-case control suite. Tests used memory/time limits.

accept default-before-contract keyword arguments f38c48bdb2

bootstrap alternate typed keyword defaults 15c8aa3fc4

Generated from source commit f38c48bdb2 (source changes verified before committing).

Validated sequential rebootstrap, boot-clean, stage0, stage1, stdlib and tools with eight build cores. Post-rebuild: 32 focused cases passed, plus the separately compiled eleven-case sugar/interface suites. Tests used memory/time limits.

propagate stable-binding facts through normal completion e9962b1a12

bootstrap stable-binding normal-completion flow 2f938b6a50

Generated from source revision e9962b1a12 using the accepted 15c8aa3f bootstrap. Validated sequential clean stage0/stage1/stdlib/tools rebuild, 36 focused cases, and 27 compiler regression cases.

This pull request is marked as a work in progress.

This branch is out-of-date with the base branch

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From your project repository, check out a new branch and test the changes.

git fetch -u origin v0.19-typed-gerbil:v0.19-typed-gerbil

git switch v0.19-typed-gerbil

Merge

Merge the changes and update on Forgejo.

Warning: The "Autodetect manual merge" setting is not enabled for this repository, you will have to mark this pull request as manually merged afterwards.

git switch v0.19-staging

git merge --no-ff v0.19-typed-gerbil

git switch v0.19-typed-gerbil

git rebase v0.19-staging

git switch v0.19-staging

git merge --ff-only v0.19-typed-gerbil

git switch v0.19-typed-gerbil

git rebase v0.19-staging

git switch v0.19-staging

git merge --no-ff v0.19-typed-gerbil

git switch v0.19-staging

git merge --squash v0.19-typed-gerbil