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, 3 insertions, 1 deletions

diff --git a/source/slang/compiler.h b/source/slang/compiler.h
index 41ba027c6..ca82950be 100644
--- a/source/slang/compiler.h
+++ b/source/slang/compiler.h
@@ -399,7 +399,7 @@ namespace Slang
         // This is a list of unique modules loaded, in the order they were encountered.
         List<RefPtr<LoadedModule> > loadedModulesList;
 
-        // Map from the path of a module file to its definition
+        // Map from the path (or uniqueIdentity if available) of a module file to its definition
         Dictionary<String, RefPtr<LoadedModule>> mapPathToLoadedModule;
 
         // Map from the logical name of a module to its definition
@@ -509,6 +509,8 @@ namespace Slang
             mSink.sourceManager = sm;
         }
 
+        void setFileSystem(ISlangFileSystem* fileSystem);
+
             /// During propagation of an exception for an internal
             /// error, note that this source location was involved
         void noteInternalErrorLoc(SourceLoc const& loc);