From 6fbd16115049f784dfb8aae525d6dcf6c7a1756e Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Thu, 22 Jan 2026 19:16:33 -0500
Subject: [PATCH] [clang] Set end loc on declspec() (#177001)

Follow-up to #176296 where the root problem was declspec() not having a
valid range.

I don't if this is the right fix! It _is_ a progression on the included
test file though, and it's similar to what
Parser::ParsePackIndexingType() in the same file does.
---
 clang/lib/Parse/ParseDeclCXX.cpp       | 1 +
 clang/test/AST/ast-dump-decl-stmts.cpp | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
index af0361c10a01..da7b07ee26d3 100644
--- a/clang/lib/Parse/ParseDeclCXX.cpp
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -1123,6 +1123,7 @@ SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
     Diag(StartLoc, DiagID) << PrevSpec;
     DS.SetTypeSpecError();
   }
+  DS.SetRangeEnd(EndLoc);
   return EndLoc;
 }
 
diff --git a/clang/test/AST/ast-dump-decl-stmts.cpp b/clang/test/AST/ast-dump-decl-stmts.cpp
index 613a3f9ee2bb..c0c37a89d34e 100644
--- a/clang/test/AST/ast-dump-decl-stmts.cpp
+++ b/clang/test/AST/ast-dump-decl-stmts.cpp
@@ -36,3 +36,6 @@ void d(), e(int);
 int f;
 // CHECK: VarDecl 0x{{[^ ]*}} <line:[[@LINE-1]]:1, col:5> col:5 f 'int'
 
+int decltype_fn_int;
+auto decltype_fn() -> decltype(decltype_fn_int);
+// CHECK: FunctionDecl {{.*}} <line:[[@LINE-1]]:1, col:47> col:6 decltype_fn 'auto () -> decltype(decltype_fn_int)'