Feature/file unique identity (#789)

* * Fix memory bug around expanding va_args - needed buffer to have space for terminating 0
* Fix problem with FileWriter defaults being globals, as memory they allocate, will only be freed after return from main - work around by making StdWriters RefObject derived, and kept in scope such the writers are destroyed before checks for leaks is found
* Added SimplifyPathAndHash mode for CacheFileSystem - will simplify the path and see if simplified path is in cache before reading file (limiting amout of underlying file requests)

* * Added calcReplaceChar
* Renamed DefaultFileSystem to OSFileSystem
* Made OSFileSystem convert windows \ to / on linux

* Simplified logic for caching in CacheFileSystem.

* Added pragma-once-c to add extra test, but also so there is an 'include' directory in preprocessor tests.

* Small fixes in pragma once test.

* Simplified cache handling path, so that paths/simplified paths area always added.

* Improve naming of methods for different caches.

* Removed references to 'canonicalPath' and made 'uniqueIdentity'

* * Re-add support for canonicalPath to ISlangFileSystem -> not for uniqueIdentifier but as a way to display 'canonicalPath'
* Added peliminary support for being able to display verbose paths in a diagnostic
* Added 'clearCache' support
* Added verbose path support to SourceManager (now needs a ISlangFileSystemExt to do this)

* Added support for '-verbose-path' option to slangc and slang-test.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/slang/options.cpp b/source/slang/options.cpp
index b87e19e46..8a4cf35b7 100644
--- a/source/slang/options.cpp
+++ b/source/slang/options.cpp
@@ -456,6 +456,10 @@ struct OptionsParser
                 {
                     requestImpl->useSerialIRBottleneck = true;
                 }
+                else if (argStr == "-verbose-paths")
+                {
+                    requestImpl->mSink.flags |= DiagnosticSink::Flag::VerbosePath;
+                }
                 else if (argStr == "-verify-debug-serial-ir")
                 {
                     requestImpl->verifyDebugSerialization = true;