[PATCH] D116921: [clangd] Enable expand-auto for decltype(auto).

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added subscribers: usaxena95, kadircet, arphaman.
hokein requested review of this revision.
Herald added subscribers: MaskRay, ilya-biryukov.
Herald added a project: clang-tools-extra.

Based on https://reviews.llvm.org/D116919.

Fixes https://github.com/clangd/clangd/issues/121


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116921

Files:
  clang-tools-extra/clangd/refactor/tweaks/ExpandAutoType.cpp
  clang-tools-extra/clangd/unittests/tweaks/ExpandAutoTypeTests.cpp


Index: clang-tools-extra/clangd/unittests/tweaks/ExpandAutoTypeTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/tweaks/ExpandAutoTypeTests.cpp
+++ clang-tools-extra/clangd/unittests/tweaks/ExpandAutoTypeTests.cpp
@@ -71,7 +71,8 @@
       apply("void ns::Func() { au^to x = new ns::Class::Nested{}; }"),
       "void ns::Func() { ns::Class::Nested * x = new ns::Class::Nested{}; }");
 
-  EXPECT_UNAVAILABLE("dec^ltype(au^to) x = 10;");
+  EXPECT_EQ(apply("dec^ltype(auto) x = 10;"), "int x = 10;");
+  EXPECT_EQ(apply("decltype(au^to) x = 10;"), "int x = 10;");
   // expanding types in structured bindings is syntactically invalid.
   EXPECT_UNAVAILABLE("const ^auto &[x,y] = (int[]){1,2};");
 
Index: clang-tools-extra/clangd/refactor/tweaks/ExpandAutoType.cpp
===================================================================
--- clang-tools-extra/clangd/refactor/tweaks/ExpandAutoType.cpp
+++ clang-tools-extra/clangd/refactor/tweaks/ExpandAutoType.cpp
@@ -96,9 +96,7 @@
   if (auto *Node = Inputs.ASTSelection.commonAncestor()) {
     if (auto *TypeNode = Node->ASTNode.get<TypeLoc>()) {
       if (const AutoTypeLoc Result = TypeNode->getAs<AutoTypeLoc>()) {
-        // Code in apply() does handle 'decltype(auto)' yet.
-        if (!Result.getTypePtr()->isDecltypeAuto() &&
-            !isStructuredBindingType(Node) &&
+        if (!isStructuredBindingType(Node) &&
             !isDeducedAsLambda(Node, Result.getBeginLoc()) &&
             !isTemplateParam(Node))
           CachedLocation = Result;


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