[gcc r16-8083] c++/reflection: add test

[Marek Polacek via Gcc-cvs]

https://gcc.gnu.org/g:9634a3b1a74e3483459e1bbf2d152fc558899c9c

commit r16-8083-g9634a3b1a74e3483459e1bbf2d152fc558899c9c
Author: Marek Polacek <pola...@redhat.com>
Date:   Fri Mar 13 13:57:37 2026 -0400

    c++/reflection: add test
    
    This test now works too.  Fixed by r16-8009 I think.
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/reflect/expansion-stmt3.C: New test.

Diff:
---
 gcc/testsuite/g++.dg/reflect/expansion-stmt3.C | 31 ++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/gcc/testsuite/g++.dg/reflect/expansion-stmt3.C 
b/gcc/testsuite/g++.dg/reflect/expansion-stmt3.C
new file mode 100644
index 000000000000..d8d377fc1170
--- /dev/null
+++ b/gcc/testsuite/g++.dg/reflect/expansion-stmt3.C
@@ -0,0 +1,31 @@
+// { dg-do compile { target c++26 } }
+// { dg-additional-options "-freflection" }
+
+#include <meta>
+#include <string_view>
+
+int volatile sink = 0;
+void use(auto&& x) {
+    sink += sizeof(x);
+}
+
+template <typename T>
+void reflect_struct(T const& obj) {
+    static constexpr std::meta::info mems[] = {^^T::name, ^^T::age, 
^^T::active};
+
+    template for (constexpr std::meta::info field : mems) {
+        use(std::meta::identifier_of(field));
+        use(obj.[:field:]);
+    }
+}
+
+template <int>
+struct User {
+    std::string_view name;
+    int age;
+    bool active;
+};
+
+int main() {
+    reflect_struct(User<0>{.name = "Alice", .age = 30, .active = true});
+}