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>

2 files changed, 16 insertions, 15 deletions

diff --git a/tests/bindings/multi-file-defines.h b/tests/bindings/multi-file-defines.h
index 52a5826b6..db0261158 100644
--- a/tests/bindings/multi-file-defines.h
+++ b/tests/bindings/multi-file-defines.h
@@ -5,12 +5,13 @@
 #define BEGIN_CBUFFER(NAME) cbuffer NAME
 #define END_CBUFFER(NAME, REG) /**/
 #define CBUFFER_REF(NAME, FIELD) FIELD
+#define PUBLIC public
 #else
 #define R(X) X
 #define BEGIN_CBUFFER(NAME) struct SLANG_ParameterGroup_##NAME
 #define END_CBUFFER(NAME, REG) ; cbuffer NAME : REG { SLANG_ParameterGroup_##NAME NAME; }
 #define CBUFFER_REF(NAME, FIELD) NAME.FIELD
-
+#define PUBLIC 
 #define sharedC     sharedC_0
 #define sharedCA    sharedCA_0
 #define sharedCB    sharedCB_0
diff --git a/tests/bindings/multi-file-shared.slang b/tests/bindings/multi-file-shared.slang
index af91d5251..dcfa6251c 100644
--- a/tests/bindings/multi-file-shared.slang
+++ b/tests/bindings/multi-file-shared.slang
@@ -3,23 +3,23 @@
 
 #include "multi-file-defines.h"
 
-float4 use(float  val) { return val; };
-float4 use(float2 val) { return float4(val,0.0,0.0); };
-float4 use(float3 val) { return float4(val,0.0); };
-float4 use(float4 val) { return val; };
-float4 use(Texture2D t, SamplerState s) { return t.SampleLevel(s, 0.0, 0.0); }
+PUBLIC float4 use(float  val) { return val; };
+PUBLIC float4 use(float2 val) { return float4(val,0.0,0.0); };
+PUBLIC float4 use(float3 val) { return float4(val,0.0); };
+PUBLIC float4 use(float4 val) { return val; };
+PUBLIC float4 use(Texture2D t, SamplerState s) { return t.SampleLevel(s, 0.0, 0.0); }
 
-Texture2D sharedT R(: register(t2));
-SamplerState sharedS R(: register(s2));
+PUBLIC Texture2D sharedT R(: register(t2));
+PUBLIC SamplerState sharedS R(: register(s2));
 
-BEGIN_CBUFFER(sharedC)
+PUBLIC BEGIN_CBUFFER(sharedC)
 {
-	float3 sharedCA;
-	float  sharedCB;
-	float3 sharedCC;
-	float2 sharedCD;
+    PUBLIC float3 sharedCA;
+    PUBLIC float sharedCB;
+    PUBLIC float3 sharedCC;
+    PUBLIC float2 sharedCD;
 }
 END_CBUFFER(sharedC, register(b2))
 
-Texture2D sharedTV R(: register(t3));
-Texture2D sharedTF R(: register(t4));
+PUBLIC Texture2D sharedTV R(: register(t3));
+PUBLIC Texture2D sharedTF R(: register(t4));