Creates the policy scope after the variable scope instead of the other
way round. This ensures that the cmStateSnapshot which the policy is
registered to is the same as the one created with the variable scope so
that reading a policy from the parent snapshot does not incorrectly read
policies from the new snapshot.
Create a stack state for managing diagnostics. This will eventually
replace some of the global state used for diagnostics, as well as
providing a mechanism to add additional diagnostics.
For now, this is only the stack manipulation with a bare minimum of
interface logic (in particular, the `block` and `include` commands).
Nothing actually looks at the diagnostic state yet, and the primary user
interface does not yet exist (although there are some references to it
already).
`include-what-you-use` diagnostics, in practice, are specific to
the environment's compiler and standard library. Update includes
to satisfy IWYU for our CI job under Debian 13. Some patterns:
* Types named in virtual `override` signatures no longer require
includes since the overridden signature already names them.
* A function argument's type needs to be included even if its constructor
is called only by implicit conversion. For example, constructing a
`std::function` from a lambda now requires `<functional>`.
* Some prior mysterious `<type_traits>` inclusions are no longer required.
Run the `clang-format.bash` script to update all our C and C++ code to a
new style defined by `.clang-format`, now with "east const" enforcement.
Use `clang-format` version 18.
* If you reached this commit for a line in `git blame`, re-run the blame
operation starting at the parent of this commit to see older history
for the content.
* See the parent commit for instructions to rebase a change across this
style transition commit.
Issue: #26123
`include-what-you-use` diagnostics, in practice, are specific to
the environment's compiler and standard library. Update includes
to satisfy IWYU for our CI job under Debian 12.