fix: legible names of using declarations

src/lib/Support/LegibleNames.cpp

@@ -225,6 +225,13 @@ class LegibleNames::Impl
                         return getUnnamedInfoName(t);
                     }
                 }
+                else if constexpr(T::isUsing())
+                {
+                    if (t.Class == UsingClass::Normal && !t.ShadowDeclarations.empty())
+                    {
+                        return getRawUnqualified(t.ShadowDeclarations.front());
+                    }
+                }
                 return t.Name;
             });
     }

test-files/golden-tests/symbols/using/using-member-conversion.adoc

@@ -0,0 +1,156 @@
+= Reference
+:mrdocs:
+
+[#index]
+== Global namespace
+
+=== Types
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#X[`X`] 
+| This struct will be inherited as public
+| link:#Y[`Y`] 
+| This struct inherits from X
+| link:#fun_ptr[`fun_ptr`] 
+| A pointer to function typedef
+|===
+
+[#fun_ptr]
+== fun_ptr
+
+A pointer to function typedef
+
+=== Synopsis
+
+Declared in `<using‐member‐conversion.cpp>`
+
+[source,cpp,subs="verbatim,replacements,macros,-callouts"]
+----
+using fun_ptr = void(*)();
+----
+
+[#X]
+== X
+
+This struct will be inherited as public
+
+=== Synopsis
+
+Declared in `<using‐member‐conversion.cpp>`
+
+[source,cpp,subs="verbatim,replacements,macros,-callouts"]
+----
+struct X;
+----
+
+=== Member Functions
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#X-2conversion[`operator fun_ptr`] 
+| Conversion operator to function pointer.
+|===
+
+=== Derived Classes
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#Y[`Y`]
+| This struct inherits from X
+|===
+
+[#X-2conversion]
+== link:#X[X]::operator link:#fun_ptr[fun_ptr]
+
+Conversion operator to function pointer.
+
+=== Synopsis
+
+Declared in `<using‐member‐conversion.cpp>`
+
+[source,cpp,subs="verbatim,replacements,macros,-callouts"]
+----
+operator link:#fun_ptr[fun_ptr]() const;
+----
+
+=== Return Value
+
+A pointer to function typedef
+
+[#Y]
+== Y
+
+This struct inherits from X
+
+=== Synopsis
+
+Declared in `<using‐member‐conversion.cpp>`
+
+[source,cpp,subs="verbatim,replacements,macros,-callouts"]
+----
+struct Y
+    : link:#X[X]
+----
+
+=== Base Classes
+
+[cols=2]
+|===
+| Name
+| Description
+| `link:#X[X]`
+| This struct will be inherited as public
+|===
+
+=== Member Functions
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#X-2conversion[`operator fun_ptr`] 
+| Conversion operator to function pointer.
+|===
+
+=== Using Declarations
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#Y-2conversion[`operator void(*)()`] 
+| Bring X::operator fun_ptr into Y.
+|===
+
+[#Y-2conversion]
+== link:#Y[Y]::operator void(*)()
+
+Bring X::operator fun_ptr into Y.
+
+=== Synopsis
+
+Declared in `<using‐member‐conversion.cpp>`
+
+[source,cpp,subs="verbatim,replacements,macros,-callouts"]
+----
+using X::operator void(*)();
+----
+
+=== Introduced Symbols
+
+[cols=2]
+|===
+| Name
+| Description
+| link:#X-2conversion[X::operator fun_ptr]
+| Conversion operator to function pointer.
+|===
+
+[.small]#Created with https://www.mrdocs.com[MrDocs]#

test-files/golden-tests/symbols/using/using-member-conversion.cpp

@@ -0,0 +1,16 @@
+/// A pointer to function typedef
+using fun_ptr = void (*)();
+
+/// This struct will be inherited as public
+struct X
+{
+    /// Conversion operator to function pointer.
+    operator fun_ptr() const;
+};
+
+/// This struct inherits from X
+struct Y : X
+{
+    /// Bring X::operator fun_ptr into Y.
+    using X::operator fun_ptr;
+};