Configure option at call site instead

Author: calda

lib/Sema/ConstraintSystem.cpp

@@ -7115,7 +7115,7 @@ bool ConstraintSystem::participatesInInference(ClosureExpr *closure) const {
 
   // If body is nested in a parent that has a function builder applied,
   // let's prevent inference until result builders.
-  if (isForCodeCompletion() && Options.contains(
+  if (Options.contains(
           ConstraintSystemFlags::
               ClosuresInResultBuildersDontParticipateInInference)) {
     return !isInResultBuilderContext(closure);

lib/Sema/TypeCheckStmt.cpp

@@ -2649,7 +2649,9 @@ TypeCheckFunctionBodyRequest::evaluate(Evaluator &evaluator,
     if (Type builderType = getResultBuilderType(func)) {
       if (auto optBody =
               TypeChecker::applyResultBuilderBodyTransform(
-                func, builderType)) {
+                func, builderType,
+                /*ClosuresInResultBuilderDontParticipateInInference=*/
+                false)) {
         if (!*optBody)
           return errorBody();