Misc language server fixes. (#3357)

3 files changed, 33 insertions, 3 deletions

diff --git a/source/slang/slang-ast-print.cpp b/source/slang/slang-ast-print.cpp
index b80afeee1..d3e028901 100644
--- a/source/slang/slang-ast-print.cpp
+++ b/source/slang/slang-ast-print.cpp
@@ -365,6 +365,20 @@ void ASTPrinter::addDeclKindPrefix(Decl* decl)
                     continue;
                 if (as<AttributeTargetModifier>(modifier))
                     continue;
+                if (as<RequiredCUDASMVersionModifier>(modifier))
+                    continue;
+                if (as<RequiredSPIRVVersionModifier>(modifier))
+                    continue;
+                if (as<RequiredGLSLVersionModifier>(modifier))
+                    continue;
+                if (as<RequiredGLSLExtensionModifier>(modifier))
+                    continue;
+                if (as<GLSLLayoutModifier>(modifier))
+                    continue;
+                if (as<GLSLLayoutModifierGroupMarker>(modifier))
+                    continue;
+                if (as<HLSLLayoutSemantic>(modifier))
+                    continue;
             }
             // Don't print out attributes.
             if (as<AttributeBase>(modifier))
diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index c31c94a85..7c36bdd5f 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -7346,6 +7346,10 @@ namespace Slang
                     visitor->getSink()->diagnose(attr, Diagnostics::cannotUseInterfaceRequirementAsDerivative);
                     return;
                 }
+                if (funcType->getParamCount() != imaginaryArguments.getCount())
+                {
+                    goto error;
+                }
                 for (Index ii = 0; ii < imaginaryArguments.getCount(); ++ii)
                 {
                     // Check if the resolved invoke argument type is an error type.
@@ -7403,7 +7407,7 @@ namespace Slang
                 return;
             }
         }
-
+    error:;
         // Build the expected signature from imaginary args to diagnose
         // when no matching function is found (this excludes the case handled above)
         // 
diff --git a/source/slang/slang-language-server.cpp b/source/slang/slang-language-server.cpp
index 24ab534ab..c188142f5 100644
--- a/source/slang/slang-language-server.cpp
+++ b/source/slang/slang-language-server.cpp
@@ -1255,8 +1255,20 @@ SlangResult LanguageServer::signatureHelp(
         return SLANG_OK;
     }
 
-    auto funcExpr =
-        appExpr->originalFunctionExpr ? appExpr->originalFunctionExpr : appExpr->functionExpr;
+    auto funcExpr = appExpr->functionExpr;
+    if (appExpr->originalFunctionExpr)
+    {
+        bool useOriginalExpr = true;
+        if (auto originalDeclRefExpr = as<DeclRefExpr>(appExpr->originalFunctionExpr))
+        {
+            if (!originalDeclRefExpr->declRef)
+            {
+                useOriginalExpr = false;
+            }
+        }
+        if (useOriginalExpr)
+            funcExpr = appExpr->originalFunctionExpr;
+    }
     if (!funcExpr)
     {
         m_connection->sendResult(NullResponse::get(), responseId);