We're going to move toward the new swift-syntax formatter. Use it for
the "swift" diagnostic style instead of the experimental formatter
written in C++.
There are some tests for the experimental formatter in C++ that test
precise formatting of diagnostics. I've disabled them in the same
places where the new swift-syntax formatter is enabled, for now. We
may choose to remove them entirely, because swift-syntax itself is
where the specific format is defined, and has those same kinds of
tests already.
Add '-validate-clang-modules-once' and '-clang-build-session-file' corresponding to Clang's '-fmodules-validate-once-per-build-session' and '-fbuild-session-file='. Ensure they are propagated to module interface build sub-invocations.
We require these to be first-class Swift options in order to ensure they are propagated to both: ClangImporter and implicit interface build compiler sub-invocations.
Compiler portion of rdar://105982120
Previously, combining `-enable-lexical-lifetimes=false` with
`-enable-experimental-move-only` resulted in an error. But this is a
valid combination: the former sets the `LexicalLifetimes` option to
`DiagnosticMarkersOnly`, which is what `-enable-experimental-move-only`
relies on.
Add a compiler option `-load-plugin-executable <path>#<module names>`.
Where '<path>' is a path to a plugin executable, '<module-name>' is a
comma-separated module names the plugin provides.
Nothing is using it at this point. Actual plugin infratructure are
introduced in follow-up commits
Introduce `-plugin-path <path>` to add a search path where we will look
for compiler plugins. When resolving an external macro definition, look
for libraries in these search paths whose names match the module name
of the macro.
Implements rdar://105095761.
Clang no longer supports `-working-directory<path>`. Split this argument
into `-working-directory <path>` so that clients passing the old
argument still work.
Add frontend flag `-emit-macro-expansion-files diagnostics` to emit any
macro expansion buffers referenced by diagnostics into files in a
temporary directory. This makes debugging type-checking failures in
macro expansions far easier, because you can see them after the
compiler process has exited.
The SwiftDiagnostics module within swift-syntax has a diagnostic
pretty-printer that does a nice rendering of the source code with
diagnostics placed inside gaps between the code lines.
Introduce another `-diagnostic-style` argument, `swift-syntax`,
to bridge from the pretty-printed C++ diagnostics over to the
swift-syntax diagnostics engine.
For spatial locality on startup.
Hide collocating metadata functions in a separate section behind a flag.
The default is not to collocate functions.
rdar://101593202
