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>

6 files changed, 12 insertions, 12 deletions

diff --git a/tests/cpu-program/class-com.slang b/tests/cpu-program/class-com.slang
index e2812f586..2dd84d696 100644
--- a/tests/cpu-program/class-com.slang
+++ b/tests/cpu-program/class-com.slang
@@ -20,7 +20,7 @@ class MyClass : IFoo
 };
 
 [DllExport]
-IFoo createFoo()
+export IFoo createFoo()
 {
     IFoo result = new MyClass();
     return result;
@@ -30,8 +30,8 @@ IFoo createFoo()
 [DllImport("", "createFoo")]
 IFoo createFooImported();
 
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     var obj = createFooImported();
     return obj.method();
-}
\ No newline at end of file
+}
diff --git a/tests/cpu-program/class.slang b/tests/cpu-program/class.slang
index 1a510118a..8935b157a 100644
--- a/tests/cpu-program/class.slang
+++ b/tests/cpu-program/class.slang
@@ -13,8 +13,8 @@ class MyClass
     }
 }
 
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     MyClass obj = new MyClass();
     return obj.method();
-}
\ No newline at end of file
+}
diff --git a/tests/cpu-program/cpu-hello-world.slang b/tests/cpu-program/cpu-hello-world.slang
index f1285f889..a44761e8f 100644
--- a/tests/cpu-program/cpu-hello-world.slang
+++ b/tests/cpu-program/cpu-hello-world.slang
@@ -1,6 +1,6 @@
 //TEST:EXECUTABLE:
 
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     printf("Hello World.\n");
     return 0;
diff --git a/tests/cpu-program/gfx-smoke.slang b/tests/cpu-program/gfx-smoke.slang
index d0acb83db..41c87ca19 100644
--- a/tests/cpu-program/gfx-smoke.slang
+++ b/tests/cpu-program/gfx-smoke.slang
@@ -2,7 +2,7 @@
 import gfx;
 import slang;
 
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     gfx.DeviceDesc deviceDesc = {};
     deviceDesc.deviceType = gfx.DeviceType.CPU;
@@ -98,4 +98,4 @@ public __extern_cpp int main()
         printf("%.1f\n", val);
     }
     return 0;
-}
\ No newline at end of file
+}
diff --git a/tests/cpu-program/pointer-basics.slang b/tests/cpu-program/pointer-basics.slang
index e38d866eb..db705d507 100644
--- a/tests/cpu-program/pointer-basics.slang
+++ b/tests/cpu-program/pointer-basics.slang
@@ -1,5 +1,5 @@
 //TEST:EXECUTABLE:
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     uint2 value;
     int *pValue = (int*)&value;
@@ -20,4 +20,4 @@ public __extern_cpp int main()
     else
         printf("Fail\n");
     return 0;
-}
\ No newline at end of file
+}
diff --git a/tests/cpu-program/pointer-deref.slang b/tests/cpu-program/pointer-deref.slang
index 79f1b2cd0..f5bad5b09 100644
--- a/tests/cpu-program/pointer-deref.slang
+++ b/tests/cpu-program/pointer-deref.slang
@@ -11,7 +11,7 @@ struct Record
     SubRecord sub;
 }
 
-public __extern_cpp int main()
+export __extern_cpp int main()
 {
     Record rec;
     Record *pRec = &rec;
@@ -27,4 +27,4 @@ public __extern_cpp int main()
         printf("fail\n");
     }
     return 0;
-}
\ No newline at end of file
+}