From: Ivan Donchevskii <ivan.donchevskii@qt.io>
Date: Fri, 7 Sep 2018 13:23:51 +0000 (+0000)
Subject: [libclang] Return the proper pointee type for 'auto' deduced to pointer
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4e24bae3a87ad427403ec1ecb539a42e2eb8a351;p=clang

[libclang] Return the proper pointee type for 'auto' deduced to pointer

Currently the resulting type is always invalid in such case.

Differential Revision: https://reviews.llvm.org/D51281

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@341656 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Index/print-type.cpp b/test/Index/print-type.cpp
index e152a7ed3d..3c76c97cca 100644
--- a/test/Index/print-type.cpp
+++ b/test/Index/print-type.cpp
@@ -75,6 +75,8 @@ template<typename T> struct A {};
 template<typename T> using C = T;
 using baz = C<A<void>>;
 
+auto autoTemplPointer = &autoTemplRefParam;
+
 // RUN: c-index-test -test-print-type %s -std=c++14 | FileCheck %s
 // CHECK: Namespace=outer:1:11 (Definition) [type=] [typekind=Invalid] [isPOD=0]
 // CHECK: ClassTemplate=Foo:4:8 (Definition) [type=] [typekind=Invalid] [isPOD=0]
@@ -182,3 +184,4 @@ using baz = C<A<void>>;
 // CHECK: UnexposedExpr=templRefParam:71:40 [type=const Specialization<Specialization<bool> &>] [typekind=Unexposed] const [templateargs/1= [type=Specialization<bool> &] [typekind=LValueReference]] [canonicaltype=const Specialization<Specialization<bool> &>] [canonicaltypekind=Record] [canonicaltemplateargs/1= [type=Specialization<bool> &] [typekind=LValueReference]] [isPOD=1]
 // CHECK: DeclRefExpr=templRefParam:71:40 [type=Specialization<Specialization<bool> &>] [typekind=Unexposed] [templateargs/1= [type=Specialization<bool> &] [typekind=LValueReference]] [canonicaltype=Specialization<Specialization<bool> &>] [canonicaltypekind=Record] [canonicaltemplateargs/1= [type=Specialization<bool> &] [typekind=LValueReference]] [isPOD=1]
 // CHECK: TypeAliasDecl=baz:76:7 (Definition) [type=baz] [typekind=Typedef] [templateargs/1= [type=A<void>] [typekind=Unexposed]] [canonicaltype=A<void>] [canonicaltypekind=Record] [canonicaltemplateargs/1= [type=void] [typekind=Void]] [isPOD=0]
+// CHECK: VarDecl=autoTemplPointer:78:6 (Definition) [type=Specialization<Specialization<bool> &> *] [typekind=Auto] [canonicaltype=Specialization<Specialization<bool> &> *] [canonicaltypekind=Pointer] [isPOD=1] [pointeetype=Specialization<Specialization<bool> &>] [pointeekind=Record]
diff --git a/tools/libclang/CXType.cpp b/tools/libclang/CXType.cpp
index 3e71435d22..d4bdebd7d8 100644
--- a/tools/libclang/CXType.cpp
+++ b/tools/libclang/CXType.cpp
@@ -442,6 +442,7 @@ CXType clang_getPointeeType(CXType CT) {
   if (!TP)
     return MakeCXType(QualType(), GetTU(CT));
 
+try_again:
   switch (TP->getTypeClass()) {
     case Type::Pointer:
       T = cast<PointerType>(TP)->getPointeeType();
@@ -459,6 +460,12 @@ CXType clang_getPointeeType(CXType CT) {
     case Type::MemberPointer:
       T = cast<MemberPointerType>(TP)->getPointeeType();
       break;
+    case Type::Auto:
+    case Type::DeducedTemplateSpecialization:
+      TP = cast<DeducedType>(TP)->getDeducedType().getTypePtrOrNull();
+      if (TP)
+        goto try_again;
+      break;
     default:
       T = QualType();
       break;