tree cba3d96f5eed35283a6c976c59a02289cf9728ef
parent a36a14b70f18b156cea8552fd4b138487340ba76
author Saar Raz <saar@raz.email> 1584402209 +0200
committer Hans Wennborg <hans@chromium.org> 1584609544 +0100

[Concepts] Fix incorrect control flow when TryAnnotateTypeConstraint annotates an invalid template-id

TryAnnotateTypeConstraint could annotate a template-id which doesn't end up being a type-constraint,
in which case control flow would incorrectly flow into ParseImplicitInt.

Reenter the loop in this case.
Enable relevant tests for C++20. This required disabling typo-correction during TryAnnotateTypeConstraint
and changing a test case which is broken due to a separate bug (will be reported and handled separately).

(cherry picked from commit 19fccc52ff2c1da1f93d9317c34769bd9bab8ac8)