https://github.com/jcsxky updated
https://github.com/llvm/llvm-project/pull/67522
>From 4a14372fc7856adb5a6d2c2c04eaec8c3a518075 Mon Sep 17 00:00:00 2001
From: huqizhi <huqi...@feysh.com>
Date: Wed, 27 Sep 2023 15:32:10 +0800
Subject: [PATCH] [clang][ASTImporter] fix clash when import `VarTemplateDecl`
in record
---
clang/lib/AST/ASTImporter.cpp | 3 +++
clang/unittests/AST/ASTImporterTest.cpp | 31 +++++++++++++++++++++++++
2 files changed, 34 insertions(+)
diff --git a/clang/lib/AST/ASTImporter.cpp b/clang/lib/AST/ASTImporter.cpp
index c7c2aecc8b179a4..a8ce1c469b6329c 100644
--- a/clang/lib/AST/ASTImporter.cpp
+++ b/clang/lib/AST/ASTImporter.cpp
@@ -6240,6 +6240,9 @@ ExpectedDecl
ASTNodeImporter::VisitVarTemplateDecl(VarTemplateDecl *D) {
// FIXME Check for ODR error if the two definitions have
// different initializers?
return Importer.MapImported(D, FoundDef);
+ if (FoundTemplate->getDeclContext()->isRecord() &&
+ D->getDeclContext()->isRecord())
+ return Importer.MapImported(D, FoundTemplate);
FoundByLookup = FoundTemplate;
break;
diff --git a/clang/unittests/AST/ASTImporterTest.cpp
b/clang/unittests/AST/ASTImporterTest.cpp
index c90b5aaeb624306..ac27d932ce919d4 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -4988,6 +4988,37 @@ TEST_P(ASTImporterOptionSpecificTestBase,
}
}
+TEST_P(ImportFriendClasses, RecordVarTemplateDecl) {
+ Decl *ToTU = getToTuDecl(
+ R"(
+ template <class T>
+ class A {
+ public:
+ template <class U>
+ static constexpr bool X = true;
+ };
+ )",
+ Lang_CXX14);
+
+ auto *ToTUX = FirstDeclMatcher<VarTemplateDecl>().match(
+ ToTU, varTemplateDecl(hasName("X")));
+ Decl *FromTU = getTuDecl(
+ R"(
+ template <class T>
+ class A {
+ public:
+ template <class U>
+ static constexpr bool X = true;
+ };
+ )",
+ Lang_CXX14, "input1.cc");
+ auto *FromX = FirstDeclMatcher<VarTemplateDecl>().match(
+ FromTU, varTemplateDecl(hasName("X")));
+ auto *ToX = Import(FromX, Lang_CXX11);
+ EXPECT_TRUE(ToX);
+ EXPECT_EQ(ToTUX, ToX);
+}
+
TEST_P(ASTImporterOptionSpecificTestBase, VarTemplateParameterDeclContext) {
constexpr auto Code =
R"(
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