Python prototype

wrap/Class.cpp

@@ -583,4 +583,16 @@ string Class::getSerializationExport() const {
   return "BOOST_CLASS_EXPORT_GUID(" + qualifiedName("::") + ", \""
       + qualifiedName() + "\");";
 }
+
+/* ************************************************************************* */
+void Class::python_wrapper(FileWriter& wrapperFile) const {
+  wrapperFile.oss << "class_<" << name << ">(\"" << name << "\")\n";
+  constructor.python_wrapper(wrapperFile, name);
+  BOOST_FOREACH(const StaticMethod& m, static_methods | boost::adaptors::map_values)
+    m.python_wrapper(wrapperFile, name);
+  BOOST_FOREACH(const Method& m, methods | boost::adaptors::map_values)
+    m.python_wrapper(wrapperFile, name);
+  wrapperFile.oss << ";\n\n";
+}
+
 /* ************************************************************************* */

wrap/Class.h

@@ -111,6 +111,9 @@ public:
   void deserialization_fragments(FileWriter& proxyFile, FileWriter& wrapperFile,
       Str wrapperName, std::vector<std::string>& functionNames) const;
 
+  // emit python wrapper
+  void python_wrapper(FileWriter& wrapperFile) const;
+
   friend std::ostream& operator<<(std::ostream& os, const Class& cls) {
     os << "class " << cls.name << "{\n";
     os << cls.constructor << ";\n";

wrap/Constructor.cpp

@@ -29,52 +29,55 @@
 using namespace std;
 using namespace wrap;
 
-
 /* ************************************************************************* */
-string Constructor::matlab_wrapper_name(const string& className) const {
+string Constructor::matlab_wrapper_name(Str className) const {
   string str = "new_" + className;
   return str;
 }
 
 /* ************************************************************************* */
-void Constructor::proxy_fragment(FileWriter& file, const std::string& wrapperName,
+void Constructor::proxy_fragment(FileWriter& file,
-        bool hasParent, const int id, const ArgumentList args) const {
+    const std::string& wrapperName, bool hasParent, const int id,
+    const ArgumentList args) const {
   size_t nrArgs = args.size();
   // check for number of arguments...
   file.oss << "      elseif nargin == " << nrArgs;
-  if (nrArgs>0) file.oss << " && ";
+  if (nrArgs > 0)
+    file.oss << " && ";
   // ...and their types
   bool first = true;
-  for(size_t i=0;i<nrArgs;i++) {
+  for (size_t i = 0; i < nrArgs; i++) {
-    if (!first) file.oss << " && ";
+    if (!first)
-    file.oss << "isa(varargin{" << i+1 << "},'" << args[i].matlabClass(".") << "')";
+      file.oss << " && ";
-    first=false;
+    file.oss << "isa(varargin{" << i + 1 << "},'" << args[i].matlabClass(".")
+        << "')";
+    first = false;
   }
   // emit code for calling constructor
-  if(hasParent)
+  if (hasParent)
     file.oss << "\n        [ my_ptr, base_ptr ] = ";
   else
     file.oss << "\n        my_ptr = ";
   file.oss << wrapperName << "(" << id;
   // emit constructor arguments
-  for(size_t i=0;i<nrArgs;i++) {
+  for (size_t i = 0; i < nrArgs; i++) {
     file.oss << ", ";
-    file.oss << "varargin{" << i+1 << "}";
+    file.oss << "varargin{" << i + 1 << "}";
   }
   file.oss << ");\n";
 }
 
 /* ************************************************************************* */
-string Constructor::wrapper_fragment(FileWriter& file,
+string Constructor::wrapper_fragment(FileWriter& file, Str cppClassName,
-         const string& cppClassName,
+    Str matlabUniqueName, Str cppBaseClassName, int id,
-         const string& matlabUniqueName,
-         const string& cppBaseClassName,
-         int id,
     const ArgumentList& al) const {
 
-  const string wrapFunctionName = matlabUniqueName + "_constructor_" + boost::lexical_cast<string>(id);
+  const string wrapFunctionName = matlabUniqueName + "_constructor_"
+      + boost::lexical_cast<string>(id);
 
-  file.oss << "void " << wrapFunctionName << "(int nargout, mxArray *out[], int nargin, const mxArray *in[])" << endl;
+  file.oss << "void " << wrapFunctionName
+      << "(int nargout, mxArray *out[], int nargin, const mxArray *in[])"
+      << endl;
   file.oss << "{\n";
   file.oss << "  mexAtExit(&_deleteAllObjects);\n";
   //Typedef boost::shared_ptr
@@ -82,22 +85,29 @@ string Constructor::wrapper_fragment(FileWriter& file,
   file.oss << "\n";
 
   //Check to see if there will be any arguments and remove {} for consiseness
-  if(al.size() > 0)
+  if (al.size() > 0)
     al.matlab_unwrap(file); // unwrap arguments
-  file.oss << "  Shared *self = new Shared(new " << cppClassName << "(" << al.names() << "));" << endl;
+  file.oss << "  Shared *self = new Shared(new " << cppClassName << "("
+      << al.names() << "));" << endl;
   file.oss << "  collector_" << matlabUniqueName << ".insert(self);\n";
 
-  if(verbose_)
+  if (verbose_)
     file.oss << "  std::cout << \"constructed \" << self << std::endl;" << endl;
-  file.oss << "  out[0] = mxCreateNumericMatrix(1, 1, mxUINT32OR64_CLASS, mxREAL);" << endl;
+  file.oss
-  file.oss << "  *reinterpret_cast<Shared**> (mxGetData(out[0])) = self;" << endl;
+      << "  out[0] = mxCreateNumericMatrix(1, 1, mxUINT32OR64_CLASS, mxREAL);"
+      << endl;
+  file.oss << "  *reinterpret_cast<Shared**> (mxGetData(out[0])) = self;"
+      << endl;
 
   // If we have a base class, return the base class pointer (MATLAB will call the base class collectorInsertAndMakeBase to add this to the collector and recurse the heirarchy)
-  if(!cppBaseClassName.empty()) {
+  if (!cppBaseClassName.empty()) {
     file.oss << "\n";
-    file.oss << "  typedef boost::shared_ptr<" << cppBaseClassName << "> SharedBase;\n";
+    file.oss << "  typedef boost::shared_ptr<" << cppBaseClassName
-    file.oss << "  out[1] = mxCreateNumericMatrix(1, 1, mxUINT32OR64_CLASS, mxREAL);\n";
+        << "> SharedBase;\n";
-    file.oss << "  *reinterpret_cast<SharedBase**>(mxGetData(out[1])) = new SharedBase(*self);\n";
+    file.oss
+        << "  out[1] = mxCreateNumericMatrix(1, 1, mxUINT32OR64_CLASS, mxREAL);\n";
+    file.oss
+        << "  *reinterpret_cast<SharedBase**>(mxGetData(out[1])) = new SharedBase(*self);\n";
   }
 
   file.oss << "}" << endl;
@@ -106,3 +116,9 @@ string Constructor::wrapper_fragment(FileWriter& file,
 }
 
 /* ************************************************************************* */
+void Constructor::python_wrapper(FileWriter& wrapperFile, Str className) const {
+  wrapperFile.oss << "  .def(\"" << name_ << "\", &" << className << "::" << name_
+      << ");\n";
+}
+
+/* ************************************************************************* */

wrap/Constructor.h

@@ -28,6 +28,8 @@ namespace wrap {
 // Constructor class
 struct Constructor: public OverloadedFunction {
 
+  typedef const std::string& Str;
+
   /// Constructor creates an empty class
   Constructor(bool verbose = false) {
     verbose_ = verbose;
@@ -45,7 +47,7 @@ struct Constructor: public OverloadedFunction {
   // classFile is class proxy file, e.g., ../matlab/@Point2/Point2.m
 
   /// wrapper name
-  std::string matlab_wrapper_name(const std::string& className) const;
+  std::string matlab_wrapper_name(Str className) const;
 
   void comment_fragment(FileWriter& proxyFile) const {
     if (nrOverloads() > 0)
@@ -61,19 +63,21 @@ struct Constructor: public OverloadedFunction {
    * Create fragment to select constructor in proxy class, e.g.,
    * if nargin == 2, obj.self = new_Pose3_RP(varargin{1},varargin{2}); end
    */
-  void proxy_fragment(FileWriter& file, const std::string& wrapperName,
+  void proxy_fragment(FileWriter& file, Str wrapperName, bool hasParent,
-      bool hasParent, const int id, const ArgumentList args) const;
+      const int id, const ArgumentList args) const;
 
   /// cpp wrapper
-  std::string wrapper_fragment(FileWriter& file,
+  std::string wrapper_fragment(FileWriter& file, Str cppClassName,
-      const std::string& cppClassName, const std::string& matlabUniqueName,
+      Str matlabUniqueName, Str cppBaseClassName, int id,
-      const std::string& cppBaseClassName, int id,
       const ArgumentList& al) const;
 
   /// constructor function
-  void generate_construct(FileWriter& file, const std::string& cppClassName,
+  void generate_construct(FileWriter& file, Str cppClassName,
       std::vector<ArgumentList>& args_list) const;
 
+  // emit python wrapper
+  void python_wrapper(FileWriter& wrapperFile, Str className) const;
+
   friend std::ostream& operator<<(std::ostream& os, const Constructor& m) {
     for (size_t i = 0; i < m.nrOverloads(); i++)
       os << m.name_ << m.argLists_[i];

wrap/GlobalFunction.cpp

@@ -127,6 +127,11 @@ void GlobalFunction::generateSingleFunction(const string& toolboxPath,
   mfunctionFile.emit(true);
 }
 
+/* ************************************************************************* */
+void GlobalFunction::python_wrapper(FileWriter& wrapperFile) const {
+  wrapperFile.oss << "def(\"" << name_ << "\", " << name_ << ");\n";
+}
+
 /* ************************************************************************* */
 
 } // \namespace wrap

wrap/GlobalFunction.h

@@ -35,6 +35,9 @@ struct GlobalFunction: public FullyOverloadedFunction {
       const std::string& wrapperName, const TypeAttributesTable& typeAttributes,
       FileWriter& file, std::vector<std::string>& functionNames) const;
 
+  // emit python wrapper
+  void python_wrapper(FileWriter& wrapperFile) const;
+
 private:
 
   // Creates a single global function - all in same namespace

wrap/Module.cpp

@@ -650,3 +650,31 @@ void Module::WriteRTTIRegistry(FileWriter& wrapperFile, const std::string& modul
 } 
  
 /* ************************************************************************* */ 
+void Module::python_wrapper(const string& toolboxPath) const {
+
+  fs::create_directories(toolboxPath);
+
+  // create the unified .cpp switch file
+  const string wrapperName = name + "_python";
+  string wrapperFileName = toolboxPath + "/" + wrapperName + ".cpp";
+  FileWriter wrapperFile(wrapperFileName, verbose, "//");
+  wrapperFile.oss << "#include <boost/python.hpp>\n\n";
+  wrapperFile.oss << "using namespace boost::python;\n";
+  wrapperFile.oss << "BOOST_PYTHON_MODULE(" + name + ")\n";
+  wrapperFile.oss << "{\n";
+
+  // write out classes
+  BOOST_FOREACH(const Class& cls, expandedClasses)
+    cls.python_wrapper(wrapperFile);
+
+  // write out global functions
+  BOOST_FOREACH(const GlobalFunctions::value_type& p, global_functions)
+    p.second.python_wrapper(wrapperFile);
+
+  // finish wrapper file
+  wrapperFile.oss << "}\n";
+
+  wrapperFile.emit(true);
+}
+
+/* ************************************************************************* */

wrap/Module.h

@@ -70,6 +70,9 @@ struct Module {
   void finish_wrapper(FileWriter& file,
       const std::vector<std::string>& functionNames) const;
 
+  /// Python code generation:
+  void python_wrapper(const std::string& path) const;
+
 private:
   static std::vector<Class> ExpandTypedefInstantiations(
       const std::vector<Class>& classes,

wrap/StaticMethod.cpp

@@ -165,3 +165,10 @@ string StaticMethod::wrapper_call(FileWriter& wrapperFile, Str cppClassName,
 }
 
 /* ************************************************************************* */
+void StaticMethod::python_wrapper(FileWriter& wrapperFile,
+    Str className) const {
+  wrapperFile.oss << "  .def(\"" << name_ << "\", &" << className << "::" << name_
+      << ");\n";
+}
+
+/* ************************************************************************* */

wrap/StaticMethod.h

@@ -52,6 +52,9 @@ struct StaticMethod: public FullyOverloadedFunction {
       Str wrapperName, const TypeAttributesTable& typeAttributes,
       std::vector<std::string>& functionNames) const;
 
+  // emit python wrapper
+  void python_wrapper(FileWriter& wrapperFile, Str className) const;
+
   friend std::ostream& operator<<(std::ostream& os, const StaticMethod& m) {
     for (size_t i = 0; i < m.nrOverloads(); i++)
       os << "static " << m.returnVals_[i] << " " << m.name_ << m.argLists_[i];

wrap/tests/testWrap.cpp

@@ -460,6 +460,25 @@ TEST( wrap, matlab_code_geometry ) {
   EXPECT(files_equal(epath + "overloadedGlobalFunction.m"    , apath + "overloadedGlobalFunction.m"    ));
 }
 
+/* ************************************************************************* */
+TEST( wrap, python_code_geometry ) {
+  // Parse into class object
+  string header_path = topdir + "/wrap/tests";
+  Module module(header_path,"geometry",enable_verbose);
+  string path = topdir + "/wrap";
+
+  // clean out previous generated code
+  fs::remove_all("actual-python");
+
+  // emit MATLAB code
+  // make_geometry will not compile, use make testwrap to generate real make
+  module.python_wrapper("actual-python");
+  string epath = path + "/tests/expected-python/";
+  string apath = "actual-python/";
+
+  EXPECT(files_equal(epath + "geometry_python.cpp", apath + "geometry_python.cpp" ));
+}
+
 /* ************************************************************************* */
 int main() { TestResult tr; return TestRegistry::runAllTests(tr); }
 /* ************************************************************************* */