Serialization/Deserialization of expansion statements.

Should fix #165.

libcxx/test/std/experimental/reflection/example-module.cppm

@@ -1,5 +1,6 @@
 module;
 #include <meta>
+#include <tuple>
 
 export module Example;
 namespace Example {
@@ -73,4 +74,21 @@ export constexpr auto rBase2 = bases_of(^^Child, ctx)[1];
 
 export constexpr auto rTDMS = data_member_spec(^^int, {.name="test"});
 
+                            // ====================
+                            // Expansion statements
+                            // ====================
+
+void test() {
+  // Iterating expansion statement.
+  constexpr static auto sequence = std::array{0, 1, 2, 3, 4};
+  template for (constexpr auto i : sequence) { (void) i; }
+
+  // Destructurable expansion statement.
+  constexpr auto tup = std::make_tuple(1, true, 'c');
+  template for (constexpr auto i : tup) { (void) i; }
+
+  // Enumerating expansion statement.
+  template for (auto i : {1, 2, 3}) { (void) i; }
+}
+
 }  // namespace Example

libcxx/test/std/experimental/reflection/module-imports.sh.cpp

@@ -2,10 +2,10 @@
 //
 // RUN: mkdir %t
 // RUN: %{cxx} %{compile_flags} -std=c++26 \
-// RUN:     -freflection -fparameter-reflection \
+// RUN:     -freflection-latest \
 // RUN:     --precompile example-module.cppm -o %t/example-module.pcm
 // RUN: %{cxx} %{compile_flags} %{link_flags} -std=c++26 \
-// RUN:     -freflection -fparameter-reflection \
+// RUN:     -freflection-latest \
 // RUN:     -fmodule-file=Example=%t/example-module.pcm %t/example-module.pcm \
 // RUN:     module-imports.sh.cpp -o %t/module-imports.sh.cpp.tsk
 // RUN: %t/module-imports.sh.cpp.tsk > %t/stdout.txt