Richard SmithandDana Jansens 643ab57f5a Refactor CppRange interface and fix a crash exposed by doing so. (#7515) ...

Split up the CppRange interface into smaller parts, with the intent of
improving the diagnostic quality and making the implementation easier to
understand.

This also makes the implementation details of the CppRange machinery
private, which breaks one of the existing tests; that test is split into
two files, one which tests the low-level machinery works, and another
that tests the resulting prelude behavior.

This change exposes a crash in `where` expression handling, where we
would perform a substitution that creates a new `SpecificConstant` that
refers into a region of a generic that has never been resolved. Fix that
by resolving the definition region of a generic if eval sees a
`SpecificConstant` that refers into it. This is usually not necessary
because something else should have resolved that region first, but that
doesn't happen here.

---------

Co-authored-by: Dana Jansens <danakj@orodu.net>

2026-07-17 00:31:12 +00:00

..

prelude

Refactor CppRange interface and fix a crash exposed by doing so. (#7515)

2026-07-17 00:31:12 +00:00

BUILD

move Core//range into prelude (#7524)

2026-07-16 21:36:45 +00:00

io.carbon

precompile and cache Carbon prelude (#7432)

2026-07-16 18:02:14 +00:00

io.impl.carbon

precompile and cache Carbon prelude (#7432)

2026-07-16 18:02:14 +00:00

prelude.carbon

move Core//range into prelude (#7524)

2026-07-16 21:36:45 +00:00