substituteInputSugarTypeForResult can be static

Author: hamishknight

lib/Sema/CSApply.cpp

@@ -7045,7 +7045,7 @@ Expr *ExprRewriter::finishApply(ApplyExpr *apply, ConcreteDeclRef callee,
     apply->setIsSuper(isSuper);
 
     cs.setExprTypes(apply);
-    Expr *result = tc.substituteInputSugarTypeForResult(apply);
+    Expr *result = TypeChecker::substituteInputSugarTypeForResult(apply);
     cs.cacheExprTypes(result);
 
     // If we have a covariant result type, perform the conversion now.

lib/Sema/TypeChecker.h

@@ -988,7 +988,7 @@ class TypeChecker final : public LazyResolver {
   /// If the inputs to an apply expression use a consistent "sugar" type
   /// (that is, a typealias or shorthand syntax) equivalent to the result type
   /// of the function, set the result type of the expression to that sugar type.
-  Expr *substituteInputSugarTypeForResult(ApplyExpr *E);
+  static Expr *substituteInputSugarTypeForResult(ApplyExpr *E);
 
   bool typeCheckAbstractFunctionBodyUntil(AbstractFunctionDecl *AFD,
                                           SourceLoc EndTypeCheckLoc);