WIP: Support for other source target language (#971)

* WIP: Setting up C/Cpp source compilation targets.

* WIP: Emitting C/CPP.

* WIP: Split out SourceSink, and use it for source output on emit.

* SourceSink -> SourceStream

* * Made SourceStream use m_ prefixing of members.
* Make all methods use lower camel
* Removed methods from SourceStream interface that are not used externally (use _ prefixing)
* Improvements to documentation

* EmitContext is now effectively empty, so just use SharedEmitContext as EmitContext.

* SharedEmitContext -> EmitContext

* Methods to LowerCamel in emit.cpp

* Split out EmitContext and ExtensionUsageTracker into separate files.

* Split out EmitVisitor into slang-c-like-source-emitter files.

* EmitVisitor -> CLikeSourceEmitter

* Tidy up around CLikeSourceEmitter - simplify header.

* Small tidy up - removing repeated comments that are in header.

* Remove EmitContext paramter threading.

* Small tidy up.
Use prefixed macros for slang-c-like-source-emitter.h

* Small tidy up in slang-c-like-source-emitter.cpp

* First pass at splitting out UnmangleContext.

* MangledNameParser -> MangledLexer.

* WIP making EmitOp (EOp) enum available outside of cpp

* Generating EmitOpInfo from macro.

* Split out emit precedence handling.
Don't use kOp_ style anymore, just use an array indexed by EmitOp.

* Disable C simple test for now.

* Keep g++/clang happy with token pasting.

* Fix win32 narrowing warning.

1 files changed, 4 insertions, 10 deletions

diff --git a/source/slang/ir-glsl-legalize.cpp b/source/slang/ir-glsl-legalize.cpp
index 6a50d32cd..b63225729 100644
--- a/source/slang/ir-glsl-legalize.cpp
+++ b/source/slang/ir-glsl-legalize.cpp
@@ -4,6 +4,8 @@
 #include "ir.h"
 #include "ir-insts.h"
 
+#include "slang-extension-usage-tracker.h"
+
 namespace Slang
 {
 
@@ -174,14 +176,6 @@ struct GLSLSystemValueInfo
     IRType*     requiredType;
 };
 
-void requireGLSLVersionImpl(
-    ExtensionUsageTracker*  tracker,
-    ProfileVersion          version);
-
-void requireGLSLExtension(
-    ExtensionUsageTracker*  tracker,
-    String const&           name);
-
 struct GLSLLegalizationContext
 {
     Session*                session;
@@ -191,12 +185,12 @@ struct GLSLLegalizationContext
 
     void requireGLSLExtension(String const& name)
     {
-        Slang::requireGLSLExtension(extensionUsageTracker, name);
+        extensionUsageTracker->requireGLSLExtension(name);
     }
 
     void requireGLSLVersion(ProfileVersion version)
     {
-        Slang::requireGLSLVersionImpl(extensionUsageTracker, version);
+        extensionUsageTracker->requireGLSLVersion(version);
     }
 
     Stage getStage()