fix(cpp1): emit correct UFCS in aliases

Author: JohelEGP

regression-tests/mixed-bugfix-for-ufcs-non-local.cpp2

@@ -20,6 +20,16 @@ g: () [[pre: o.f()]] = { }
 
 h: () -> t<o.f()> = o;
 
+// Aliases.
+
+// a: <V: t<o.f()>> type == bool; // Blocked on [GCC109781][].
+
+// b: <V: t<o.f()>> _ == false; // Blocked on [GCC109781][].
+
+c: type == t<o.f()>;
+
+d: _ == t<o.f()>();
+
 main: () = { }
 
 // [GCC109781]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109781

regression-tests/test-results/mixed-bugfix-for-ufcs-non-local.cpp

@@ -32,6 +32,16 @@ auto g() -> void;
 
 [[nodiscard]] auto h() -> t<CPP2_UFCS(,,(f),(o),())>;
 
+// Aliases.
+
+// a: <V: t<o.f()>> type == bool; // Blocked on [GCC109781][].
+
+// b: <V: t<o.f()>> _ == false; // Blocked on [GCC109781][].
+
+using c = t<CPP2_UFCS(,,(f),(o),())>;
+
+auto const& d = t<CPP2_UFCS(,,(f),(o),())>();
+
 auto main() -> int;
 
 // [GCC109781]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109781
@@ -55,5 +65,6 @@ auto g() -> void{
 
 [[nodiscard]] auto h() -> t<CPP2_UFCS(,,(f),(o),())> { return o;  }
 
+#line 33 "mixed-bugfix-for-ufcs-non-local.cpp2"
 auto main() -> int{}
 

source/cppfront.cpp

@@ -2950,6 +2950,7 @@ class cppfront
                     || (
                         (
                          current_declarations.back()->is_object()
+                         || current_declarations.back()->is_alias()
                          || (
                              current_declarations.back()->is_function()
                              && current_declarations.back() == having_signature_emitted
@@ -4822,6 +4823,9 @@ class cppfront
         };
         auto stack = stack_value(having_signature_emitted, &n);
 
+        current_declarations.push_back(&n);
+        auto guard = finally([&]{ current_declarations.pop_back(); });
+
         //  Handle aliases
 
         if (n.is_alias())
@@ -4935,9 +4939,6 @@ class cppfront
             return;
         }
 
-        current_declarations.push_back(&n);
-        auto guard = finally([&]{ current_declarations.pop_back(); });
-
         //  If this is a function that has multiple return values,
         //  first we need to emit the struct that contains the returns
         if (