Add reflection api for overload candidate filtering. (#8066)

* Add reflection api for overload candidate filtering.

* Fix API.

* Fix.

* Update build.

* Update test.

* Update formatting.

1 files changed, 40 insertions, 0 deletions

diff --git a/source/slang/slang-reflection-api.cpp b/source/slang/slang-reflection-api.cpp
index 56a82e17e..95dcc6249 100644
--- a/source/slang/slang-reflection-api.cpp
+++ b/source/slang/slang-reflection-api.cpp
@@ -5,6 +5,7 @@
 #include "slang-check.h"
 #include "slang-compiler.h"
 #include "slang-deprecated.h"
+#include "slang-lookup.h"
 #include "slang-syntax.h"
 #include "slang-type-layout.h"
 #include "slang.h"
@@ -994,6 +995,45 @@ SLANG_API SlangReflectionFunction* spReflection_FindFunctionByNameInType(
     return nullptr;
 }
 
+
+SLANG_API SlangReflectionFunction* spReflection_TryResolveOverloadedFunction(
+    SlangReflection* reflection,
+    uint32_t candidateCount,
+    SlangReflectionFunction** candidates)
+{
+    auto programLayout = convert(reflection);
+    auto program = programLayout->getProgram();
+    auto astBuilder = program->getLinkage()->getASTBuilder();
+    SLANG_AST_BUILDER_RAII(astBuilder);
+    OverloadedExpr* overloadedFunc = nullptr;
+    if (candidateCount == 1)
+    {
+        overloadedFunc = convertToOverloadedFunc(candidates[0]);
+        if (!overloadedFunc)
+            return candidates[0];
+    }
+    else
+    {
+        overloadedFunc = astBuilder->create<OverloadedExpr>();
+        overloadedFunc->type = astBuilder->getOrCreate<OverloadGroupType>();
+        for (uint32_t i = 0; i < candidateCount; i++)
+        {
+            auto func = convertToFunc(candidates[i]);
+            AddToLookupResult(overloadedFunc->lookupResult2, LookupResultItem(func));
+        }
+    }
+
+    try
+    {
+        auto result = program->tryResolveOverloadedExpr(overloadedFunc);
+        return tryConvertExprToFunctionReflection(astBuilder, result);
+    }
+    catch (...)
+    {
+    }
+    return nullptr;
+}
+
 SLANG_API SlangReflectionVariable* spReflection_FindVarByNameInType(
     SlangReflection* reflection,
     SlangReflectionType* reflType,