Support visibility control and default to `internal`. (#3380)

* Support visibility control and default to `internal`.

* Fix wip.

* Fixes.

* Fix.

* Fix test.

* Add legacy language detection and compatibility for existing code.

* Add doc.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/source/slang/slang-syntax.cpp b/source/slang/slang-syntax.cpp
index 53a02ed87..678d9ec26 100644
--- a/source/slang/slang-syntax.cpp
+++ b/source/slang/slang-syntax.cpp
@@ -765,6 +765,17 @@ Module* getModule(Decl* decl)
     return moduleDecl->module;
 }
 
+ModuleDecl* getModuleDecl(Scope* scope)
+{
+    for (; scope; scope = scope->parent)
+    {
+        if (scope->containerDecl)
+            return getModuleDecl(scope->containerDecl);
+    }
+    return nullptr;
+
+}
+
 Decl* getParentDecl(Decl* decl)
 {
     decl = decl->parentDecl;