[clang] Correct end for the CastOperation.OpRange

clang/docs/ReleaseNotes.rst

@@ -379,6 +379,25 @@ Improvements to Clang's diagnostics
   can sometimes lead to worse ordering.
 
 
+- When describing a warning/error in a function-style type conversion Clang underlines only until
+  the end of the expression we convert from. Now Clang underlines until the closing parenthesis.
+
+  Before:
+
+  .. code-block:: text
+
+    warning: cast from 'long (*)(const int &)' to 'decltype(fun_ptr)' (aka 'long (*)(int &)') converts to incompatible function type [-Wcast-function-type-strict]
+    24 | return decltype(fun_ptr)( f_ptr /*comment*/);
+       |        ^~~~~~~~~~~~~~~~~~~~~~~~
+
+  After:
+
+  .. code-block:: text
+
+    warning: cast from 'long (*)(const int &)' to 'decltype(fun_ptr)' (aka 'long (*)(int &)') converts to incompatible function type [-Wcast-function-type-strict]
+    24 | return decltype(fun_ptr)( f_ptr /*comment*/);
+       |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
 Bug Fixes in This Version
 -------------------------
 - Fixed an issue where a class template specialization whose declaration is

clang/lib/Sema/SemaCast.cpp

@@ -3362,7 +3362,7 @@ ExprResult Sema::BuildCXXFunctionalCastExpr(TypeSourceInfo *CastTypeInfo,
   assert(LPLoc.isValid() && "List-initialization shouldn't get here.");
   CastOperation Op(*this, Type, CastExpr);
   Op.DestRange = CastTypeInfo->getTypeLoc().getSourceRange();
-  Op.OpRange = SourceRange(Op.DestRange.getBegin(), CastExpr->getEndLoc());
+  Op.OpRange = SourceRange(Op.DestRange.getBegin(), RPLoc);
 
   Op.CheckCXXCStyleCast(/*FunctionalCast=*/true, /*ListInit=*/false);
   if (Op.SrcExpr.isInvalid())

clang/test/Misc/misc-source-ranges.cpp

@@ -1,7 +1,13 @@
-// RUN: not %clang_cc1 -fsyntax-only -fdiagnostics-print-source-range-info %s 2>&1 | FileCheck %s
+// RUN: not %clang_cc1 -fsyntax-only -fdiagnostics-print-source-range-info -Wcast-function-type-strict %s 2>&1 | FileCheck %s
 
 struct S {
   char a : 12 - 12;
 };
 // CHECK: misc-source-ranges.cpp:[[@LINE-2]]:8:{[[@LINE-2]]:12-[[@LINE-2]]:19}
 
+using fun = long(*)(int &);
+fun foo(){
+  long (*f_ptr)(const int &);
+  return fun(f_ptr);
+}
+// CHECK: misc-source-ranges.cpp:[[@LINE-2]]:10:{[[@LINE-2]]:10-[[@LINE-2]]:20}