================
@@ -0,0 +1,42 @@
+// RUN: rm -rf %t
+// RUN: split-file %s %t
+// RUN: cd %t
+//
+// RUN: %clang_cc1 -std=c++20 -I %t %t/A.cppm -emit-module-interface -o
%t/A.pcm -verify
+// RUN: %clang_cc1 -std=c++20 -I %t %t/B.cpp -fmodule-file=A=%t/A.pcm
-fsyntax-only -verify -ast-dump-all -ast-dump-filter baz | FileCheck %s
+
+//--- foo.h
+namespace baz {
+ using foo = char;
+ using baz::foo;
+}
+
+//--- A.cppm
+// expected-no-diagnostics
+module;
+#include "foo.h"
+export module A;
+
+//--- B.cpp
+// expected-no-diagnostics
+#include "foo.h"
+import A;
+// Since modules are loaded lazily, force loading by performing a lookup.
+using xxx = baz::foo;
+
+// CHECK-LABEL: Dumping baz:
+// CHECK-NEXT: NamespaceDecl 0x[[BAZ_REDECL_ADDR:[^ ]*]] prev 0x[[BAZ_ADDR:[^
]*]] <{{.*}}> line:{{.*}} imported in A.<global> hidden <undeserialized
declarations> baz
+// CHECK-NEXT: |-original Namespace 0x[[BAZ_ADDR]] 'baz'
+// CHECK-NEXT: |-TypeAliasDecl 0x[[ALIAS_REDECL_ADDR:[^ ]*]] prev
0x[[ALIAS_ADDR:[^ ]*]] <{{.*}}> col:{{.*}} imported in A.<global> hidden foo
'char'
+// CHECK-NEXT: | `-BuiltinType 0x{{[^ ]*}} 'char'
+// CHECK-NEXT: |-UsingDecl 0x{{[^ ]*}} first 0x[[USING_ADDR:[^ ]*]] <{{.*}}>
col:{{.*}} imported in A.<global> hidden baz::foo
+// CHECK-NEXT: | `-NestedNameSpecifier Namespace 0x[[BAZ_REDECL_ADDR]] 'baz'
+// CHECK-NEXT: `-UsingShadowDecl 0x{{[^ ]*}} prev 0x[[SHADOW_ADDR:[^ ]*]]
<{{.*}}> col:{{.*}} imported in A.<global> hidden implicit TypeAlias
0x[[ALIAS_REDECL_ADDR]] 'foo'
----------------
ChuanqiXu9 wrote:
In such case, I'd like to introduce unittest. For example
https://github.com/llvm/llvm-project/blob/main/clang/unittests/Sema/SemaNoloadLookupTest.cpp,
https://github.com/llvm/llvm-project/blob/main/clang/unittests/Serialization/VarDeclConstantInitTest.cpp
and
https://github.com/llvm/llvm-project/pull/76774/files#diff-b1c26f074f25d8306b5ac4522770a2487a57194176355cf9af17688217573788.
While it may take you 10+ minutes, it will look much prettier than the current
way.
https://github.com/llvm/llvm-project/pull/80245
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