Allow inheriting constructor types to be substitution candidates.

Fixes #286.

src/ast.rs

@@ -3277,13 +3277,13 @@ impl Parse for VOffset {
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum CtorDtorName {
     /// "C1", the "complete object constructor"
-    CompleteConstructor(Option<Box<Name>>),
+    CompleteConstructor(Option<TypeHandle>),
     /// "C2", the "base object constructor"
-    BaseConstructor(Option<Box<Name>>),
+    BaseConstructor(Option<TypeHandle>),
     /// "C3", the "complete object allocating constructor"
-    CompleteAllocatingConstructor(Option<Box<Name>>),
+    CompleteAllocatingConstructor(Option<TypeHandle>),
     /// "C4", the "maybe in-charge constructor"
-    MaybeInChargeConstructor(Option<Box<Name>>),
+    MaybeInChargeConstructor(Option<TypeHandle>),
     /// "D0", the "deleting destructor"
     DeletingDestructor,
     /// "D1", the "complete object destructor"
@@ -3295,7 +3295,7 @@ pub enum CtorDtorName {
 }
 
 impl CtorDtorName {
-    fn inheriting_mut(&mut self) -> &mut Option<Box<Name>> {
+    fn inheriting_mut(&mut self) -> &mut Option<TypeHandle> {
         match self {
             CtorDtorName::CompleteConstructor(ref mut inheriting)
             | CtorDtorName::BaseConstructor(ref mut inheriting)
@@ -3354,8 +3354,8 @@ impl Parse for CtorDtorName {
                 }?;
 
                 if inheriting {
-                    let (ty, tail) = Name::parse(ctx, subs, tail)?;
-                    *ctor_type.inheriting_mut() = Some(Box::new(ty));
+                    let (ty, tail) = TypeHandle::parse(ctx, subs, tail)?;
+                    *ctor_type.inheriting_mut() = Some(ty);
                     Ok((ctor_type, tail))
                 } else {
                     Ok((ctor_type, tail))

tests/tests.rs

@@ -611,6 +611,12 @@ demangles!(
     "nsresult mozilla::extensions::AtomSet::Get<&(mozilla::extensions::WILDCARD_SCHEMES.<char const* at offset 0>)>(RefPtr<mozilla::extensions::AtomSet>&)"
 );
 
+// Test that inheriting constructor types are eligible for substitution.
+demangles!(
+    _ZN6deluge3gui9menu_item15MasterTransposeCI18MenuItemERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESB_,
+    "deluge::gui::menu_item::MasterTranspose::MenuItem(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)"
+);
+
 // This symbol previously ran into some mutual recursion and unbounded growth of the substitution table.
 // See <https://github.com/gimli-rs/cpp_demangle/issues/277> and <https://github.com/getsentry/symbolic/issues/477>
 #[test]