eolian_cxx: initial version of the EFL C++ Bindings Generator.

Summary:
This patch adds 'eolian_cxx' -- a C++ bindings generator --
to the EFL tree. Eolian Cxx uses Eolian API to read .eo files and generate
.eo.hh. It relies/depends on Eo Cxx and Eina Cxx (both non-generated
bindings).

src/bin/eolian_cxx: The eolian_cxx program.
src/lib/eolian_cxx: A header-only library that implements the C++ code
generation that binds the .eo classes.

=Examples=

src/examples/eolian_cxx/eolian_cxx_simple_01.cc: The simplest example,
it just uses some "dummy" generated C++ classes.

src/examples/eolian_cxx/eolian_cxx_inherit_01.cc: Illustrates how
pure C++ classes inherit from .eo generated classes.

src/examples/evas/evas_cxx_rectangle.cc: More realistic example using
the generated bindings Evas Cxx. Still a bit shallow because we don't
have full fledged .eo descriptions yet, but will be improved.

=Important=

The generated code is not supported and not a stable API/ABI. It is
here to gather people interest and get review before we set things in
stone for release 1.11.

@feature

Reviewers: cedric, smohanty, raster, stefan_schmidt

CC: felipealmeida, JackDanielZ, cedric, stefan

Differential Revision: https://phab.enlightenment.org/D805

Signed-off-by: Cedric Bail <cedric.bail@free.fr>

1 files changed, 91 insertions, 0 deletions

diff --git a/src/lib/eolian_cxx/eo_validate.hh b/src/lib/eolian_cxx/eo_validate.hh
new file mode 100644
index 0000000000..9e5342d55d
--- /dev/null
+++ b/src/lib/eolian_cxx/eo_validate.hh
@@ -0,0 +1,91 @@
+
+#ifndef EOLIAN_CXX_EO_CLASS_VALIDATE_HH
+#define EOLIAN_CXX_EO_CLASS_VALIDATE_HH
+
+#include <string>
+#include <cassert>
+
+#ifdef DEBUG
+#include <iostream>
+#endif
+
+#include "eo_types.hh"
+
+namespace efl { namespace eolian {
+
+inline bool
+_isvalid(const std::string& name)
+{
+   return name.size() > 0 and isalpha(name[0]);
+}
+
+inline void
+_dbg(const std::string& msg)
+{
+#ifdef DEBUG
+   std::cerr << "eo_validate() - " << msg << std::endl;
+#endif
+}
+
+inline void
+eo_class_validate(const eo_class& cls)
+{
+   _dbg("class name... " + cls.name);
+   assert(_isvalid(cls.name));
+
+   _dbg("class type... " + cls.type);
+   assert(cls.type != eo_class::regular_ ||
+          cls.type != eo_class::regular_noninst_ ||
+          cls.type != eo_class::interface_ ||
+          cls.type != eo_class::mixin_);
+
+   {
+      constructors_container_type::const_iterator it,
+        first = cls.constructors.begin(),
+        last = cls.constructors.end();
+      for (it = first; it != last; ++it)
+        {
+           parameters_container_type::const_iterator
+             param = (*it).params.begin(),
+             last_param = (*it).params.end();
+           _dbg("constructor... " + (*it).name);
+           assert(_isvalid((*it).name));
+           for (; param != last_param; ++param)
+             {
+                _dbg("constructor parameter... " + (*param).name);
+                assert(_isvalid((*param).name));
+                _dbg("constructor parameter type... " + (*param).type);
+                assert(_isvalid((*param).type));
+             }
+        }
+   }
+
+   {
+      functions_container_type::const_iterator it,
+        first = cls.functions.begin(),
+        last  = cls.functions.end();
+      for (it = first; it != last; ++it)
+        {
+           _dbg("function... " + (*it).name);
+           assert(_isvalid((*it).name));
+           _dbg("function api... " + (*it).impl);
+           assert(_isvalid((*it).impl));
+           _dbg("function return... " + (*it).ret);
+           assert(_isvalid((*it).ret));
+           parameters_container_type::const_iterator
+             param = (*it).params.begin(),
+             last_param = (*it).params.end();
+           for (; param != last_param; ++param)
+             {
+                _dbg("function parameter... " + (*param).name);
+                assert(_isvalid((*param).name));
+                _dbg("function parameter type... " + (*param).type);
+                assert(_isvalid((*param).type));
+             }
+        }
+   }
+}
+
+} } // namespace efl { namespace eolian {
+
+#endif // EOLIAN_CXX_EO_CLASS_VALIDATE_HH