From 1e91237549378d00d0af16d856c0e1243b0d79c8 Mon Sep 17 00:00:00 2001
From: Sergey Kalinichev <kalinichev.so.0@gmail.com>
Date: Thu, 7 Jan 2016 09:20:40 +0000
Subject: [PATCH] [libclang] Handle AutoType in clang_getTypeDeclaration

Differential Revision: http://reviews.llvm.org/D13001


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@257043 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Index/print-type-declaration.cpp | 12 ++++++++++++
 tools/c-index-test/c-index-test.c     | 20 ++++++++++++++++++++
 tools/libclang/CXType.cpp             |  6 ++++++
 3 files changed, 38 insertions(+)
 create mode 100644 test/Index/print-type-declaration.cpp

diff --git a/test/Index/print-type-declaration.cpp b/test/Index/print-type-declaration.cpp
new file mode 100644
index 0000000000..31c0a73fcd
--- /dev/null
+++ b/test/Index/print-type-declaration.cpp
@@ -0,0 +1,12 @@
+
+class Test{};
+
+int main()
+{
+  auto a = Test();
+  auto b = a;
+}
+
+// RUN: c-index-test -test-print-type-declaration -std=c++11 %s | FileCheck %s
+// CHECK: VarDecl=a:6:8 (Definition) [typedeclaration=Test] [typekind=Record]
+// CHECK: VarDecl=b:7:8 (Definition) [typedeclaration=Test] [typekind=Record]
diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index 8336491c01..2a6002537e 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -1507,6 +1507,22 @@ static enum CXChildVisitResult PrintBitWidth(CXCursor cursor, CXCursor p,
   return CXChildVisit_Recurse;
 }
 
+/******************************************************************************/
+/* Type declaration testing                                                   */
+/******************************************************************************/
+
+static enum CXChildVisitResult PrintTypeDeclaration(CXCursor cursor, CXCursor p,
+                                             CXClientData d) {
+  CXCursor typeDeclaration = clang_getTypeDeclaration(clang_getCursorType(cursor));
+
+  if (clang_isDeclaration(typeDeclaration.kind)) {
+    PrintCursor(cursor, NULL);
+    PrintTypeAndTypeKind(clang_getCursorType(typeDeclaration), " [typedeclaration=%s] [typekind=%s]\n");
+  }
+
+  return CXChildVisit_Recurse;
+}
+
 /******************************************************************************/
 /* Loading ASTs/source.                                                       */
 /******************************************************************************/
@@ -4137,6 +4153,7 @@ static void print_usage(void) {
     "       c-index-test -test-print-type {<args>}*\n"
     "       c-index-test -test-print-type-size {<args>}*\n"
     "       c-index-test -test-print-bitwidth {<args>}*\n"
+    "       c-index-test -test-print-type-declaration {<args>}*\n"
     "       c-index-test -print-usr [<CursorKind> {<args>}]*\n"
     "       c-index-test -print-usr-file <file>\n"
     "       c-index-test -write-pch <file> <compiler arguments>\n");
@@ -4230,6 +4247,9 @@ int cindextest_main(int argc, const char **argv) {
   else if (argc > 2 && strcmp(argv[1], "-test-print-type-size") == 0)
     return perform_test_load_source(argc - 2, argv + 2, "all",
                                     PrintTypeSize, 0);
+  else if (argc > 2 && strcmp(argv[1], "-test-print-type-declaration") == 0)
+    return perform_test_load_source(argc - 2, argv + 2, "all",
+                                    PrintTypeDeclaration, 0);
   else if (argc > 2 && strcmp(argv[1], "-test-print-bitwidth") == 0)
     return perform_test_load_source(argc - 2, argv + 2, "all",
                                     PrintBitWidth, 0);
diff --git a/tools/libclang/CXType.cpp b/tools/libclang/CXType.cpp
index 72c12cd16b..44bb631f78 100644
--- a/tools/libclang/CXType.cpp
+++ b/tools/libclang/CXType.cpp
@@ -412,6 +412,12 @@ try_again:
                                                          .getAsTemplateDecl();
     break;
 
+  case Type::Auto:
+    TP = cast<AutoType>(TP)->getDeducedType().getTypePtrOrNull();
+    if (TP)
+      goto try_again;
+    break;
+
   case Type::InjectedClassName:
     D = cast<InjectedClassNameType>(TP)->getDecl();
     break;
-- 
2.50.1