efl_mono: Support type aliases.

Summary:
Due to the absence of typedef from C#, we generate thin structs with
implicit operators to allow reference the data from their typedef'd name
from C#.

The other alternatives would be always converting to the lowest base on
the alias stack (losing the meaningfulness of the typedef name) or using
the 'using' directive. The latter has the restriction that it makes an
alias visible only in the file they are declared.

Reviewers: felipealmeida, cedric, segfaultxavi

Reviewed By: segfaultxavi

Subscribers: zmike

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D6157

1 files changed, 33 insertions, 0 deletions

diff --git a/src/lib/eolian_cxx/grammar/klass_def.hpp b/src/lib/eolian_cxx/grammar/klass_def.hpp
index 24969ab37a..d8b61458ce 100644
--- a/src/lib/eolian_cxx/grammar/klass_def.hpp
+++ b/src/lib/eolian_cxx/grammar/klass_def.hpp
@@ -414,6 +414,39 @@ inline void type_def::set(Eolian_Expression_Type eolian_exp_type)
       }
 }
 
+struct alias_def
+{
+  std::string eolian_name;
+  std::string cxx_name;
+  std::vector<std::string> namespaces;
+  bool is_undefined;
+  type_def base_type {};
+  documentation_def documentation;
+
+  alias_def(Eolian_Typedecl const* alias_obj, Eolian_Unit const* unit)
+  {
+     cxx_name = eolian_name = ::eolian_typedecl_short_name_get(alias_obj);
+
+     for(efl::eina::iterator<const char> namespace_iterator( ::eolian_typedecl_namespaces_get(alias_obj))
+          , namespace_last; namespace_iterator != namespace_last; ++namespace_iterator)
+       {
+          this->namespaces.push_back((&*namespace_iterator));
+       }
+
+     Eolian_Type const* bt = ::eolian_typedecl_base_type_get(alias_obj);
+     if (eolian_type_type_get(bt) == EOLIAN_TYPE_UNDEFINED)
+       is_undefined = true;
+     else
+       {
+          base_type = type_def(::eolian_typedecl_base_type_get(alias_obj), unit, EOLIAN_C_TYPE_DEFAULT);
+          is_undefined = false;
+       }
+
+     documentation = ::eolian_typedecl_documentation_get(alias_obj);
+
+  }
+};
+
 enum class parameter_direction
 {
   unknown, in, inout, out