Changes to wrap from FixedValues branch/PR. Since unrelated to that PR and useful for OptionalJacobian wrapping in py_wrap, made this a separate PR.

wrap/Class.cpp

@@ -28,6 +28,7 @@
 #include <vector> 
 #include <iostream> 
 #include <fstream> 
+#include <sstream>
 #include <iterator>     // std::ostream_iterator
 //#include <cstdint> // on Linux GCC: fails with error regarding needing C++0x std flags 
 //#include <cinttypes> // same failure as above 
@@ -314,6 +315,25 @@ vector<Class> Class::expandTemplate(Str templateArg,
   return result;
 }
 
+/* ************************************************************************* */
+vector<Class> Class::expandTemplate(Str templateArg,
+    const vector<int>& integers) const {
+  vector<Class> result;
+  BOOST_FOREACH(int i, integers) {
+    Qualified expandedClass = (Qualified) (*this);
+    stringstream ss; ss << i;
+    string instName = ss.str();
+    expandedClass.expand(instName);
+    const TemplateSubstitution ts(templateArg, instName, expandedClass);
+    Class inst = expandTemplate(ts);
+    inst.name_ = expandedClass.name();
+    inst.templateArgs.clear();
+    inst.typedefName = qualifiedName("::") + "<" + instName + ">";
+    result.push_back(inst);
+  }
+  return result;
+}
+
 /* ************************************************************************* */
 void Class::addMethod(bool verbose, bool is_const, Str methodName,
     const ArgumentList& argumentList, const ReturnValue& returnValue,

wrap/Class.h

@@ -106,6 +106,10 @@ public:
   std::vector<Class> expandTemplate(Str templateArg,
       const std::vector<Qualified>& instantiations) const;
 
+  // Create new classes with integer template arguments
+  std::vector<Class> expandTemplate(Str templateArg,
+      const std::vector<int>& integers) const;
+
   /// Add potentially overloaded, potentially templated method
   void addMethod(bool verbose, bool is_const, Str methodName,
       const ArgumentList& argumentList, const ReturnValue& returnValue,

wrap/Module.cpp

@@ -47,15 +47,17 @@ namespace fs = boost::filesystem;
 // If a number of template arguments were given, generate a number of expanded
 // class names, e.g., PriorFactor -> PriorFactorPose2, and add those classes
 static void handle_possible_template(vector<Class>& classes, const Class& cls,
-    const vector<Qualified>& instantiations) {
+    const Template& t) {
-  if (cls.templateArgs.empty() || instantiations.empty()) {
+  if (cls.templateArgs.empty() || t.empty()) {
     classes.push_back(cls);
   } else {
     if (cls.templateArgs.size() != 1)
       throw std::runtime_error(
           "In-line template instantiations only handle a single template argument");
-    vector<Class> classInstantiations = //
+    string arg = cls.templateArgs.front();
-        cls.expandTemplate(cls.templateArgs.front(), instantiations);
+    vector<Class> classInstantiations =
+        (t.nrValues() > 0) ? cls.expandTemplate(arg, t.argValues()) :
+            cls.expandTemplate(arg, t.intList());
     BOOST_FOREACH(const Class& c, classInstantiations)
       classes.push_back(c);
   }
@@ -107,7 +109,7 @@ void Module::parseMarkup(const std::string& data) {
   Rule class_p = class_g //
       [assign_a(cls.namespaces_, namespaces)]
       [bl::bind(&handle_possible_template, bl::var(classes), bl::var(cls),
-          bl::var(classTemplate.argValues()))]
+          bl::var(classTemplate))]
           [clear_a(classTemplate)] //
       [assign_a(cls,cls0)];
 

wrap/Template.h

@@ -26,6 +26,7 @@ namespace wrap {
 class Template {
   std::string argName_;
   std::vector<Qualified> argValues_;
+  std::vector<int> intList_;
   friend struct TemplateGrammar;
 public:
   /// The only way to get values into a Template is via our friendly Grammar
@@ -34,13 +35,20 @@ public:
   void clear() {
     argName_.clear();
     argValues_.clear();
+    intList_.clear();
   }
   const std::string& argName() const {
     return argName_;
   }
+  const std::vector<int>& intList() const {
+    return intList_;
+  }
   const std::vector<Qualified>& argValues() const {
     return argValues_;
   }
+  bool empty() const {
+    return argValues_.empty() && intList_.empty();
+  }
   size_t nrValues() const {
     return argValues_.size();
   }
@@ -53,16 +61,52 @@ public:
 
 };
 
+/* ************************************************************************* */
+// http://boost-spirit.com/distrib/spirit_1_8_2/libs/spirit/doc/grammar.html
+struct IntListGrammar: public classic::grammar<IntListGrammar > {
+
+  typedef std::vector<int> IntList;
+  IntList& result_; ///< successful parse will be placed in here
+
+  /// Construct type grammar and specify where result is placed
+  IntListGrammar(IntList& result) :
+      result_(result) {
+  }
+
+  /// Definition of type grammar
+  template<typename ScannerT>
+  struct definition {
+
+    classic::rule<ScannerT> integer_p, intList_p;
+
+    definition(IntListGrammar const& self) {
+      using namespace classic;
+
+      integer_p = int_p[push_back_a(self.result_)];
+
+      intList_p = '{' >> !integer_p >> *(',' >> integer_p) >> '}';
+    }
+
+    classic::rule<ScannerT> const& start() const {
+      return intList_p;
+    }
+
+  };
+};
+// IntListGrammar
+
 /* ************************************************************************* */
 // http://boost-spirit.com/distrib/spirit_1_8_2/libs/spirit/doc/grammar.html
 struct TemplateGrammar: public classic::grammar<TemplateGrammar> {
 
   Template& result_; ///< successful parse will be placed in here
   TypeListGrammar<'{', '}'> argValues_g; ///< TypeList parser
+  IntListGrammar intList_g; ///< TypeList parser
 
   /// Construct type grammar and specify where result is placed
   TemplateGrammar(Template& result) :
-      result_(result), argValues_g(result.argValues_) {
+      result_(result), argValues_g(result.argValues_), //
+      intList_g(result.intList_) {
   }
 
   /// Definition of type grammar
@@ -76,7 +120,7 @@ struct TemplateGrammar: public classic::grammar<TemplateGrammar> {
       using classic::assign_a;
       templateArgValues_p = (str_p("template") >> '<'
           >> (BasicRules<ScannerT>::name_p)[assign_a(self.result_.argName_)]
-          >> '=' >> self.argValues_g >> '>');
+          >> '=' >> (self.argValues_g | self.intList_g) >> '>');
     }
 
     classic::rule<ScannerT> const& start() const {

wrap/tests/geometry.h

@@ -127,6 +127,12 @@ class MyFactor {
 // and a typedef specializing it
 typedef MyFactor<gtsam::Pose2, Matrix> MyFactorPosePoint2;
 
+// A class with integer template arguments
+template<N = {3,12}>
+class MyVector {
+  MyVector();
+};
+
 // comments at the end!
 
 // even more comments at the end!

wrap/tests/testClass.cpp

@@ -221,6 +221,29 @@ TEST( Class, TemplateSubstition ) {
 
 }
 
+//******************************************************************************
+TEST( Class, TemplateSubstitionIntList ) {
+
+  using classic::space_p;
+
+  // Create type grammar that will place result in cls
+  Class cls;
+  Template t;
+  ClassGrammar g(cls, t);
+
+  string markup(string("template<N = {3,4}>"
+      "class Point2 {"
+      " void myMethod(Matrix A) const;"
+      "};"));
+
+  EXPECT(parse(markup.c_str(), g, space_p).full);
+
+  vector<Class> classes = cls.expandTemplate(t.argName(), t.intList());
+
+  // check the number of new classes is 2
+  EXPECT_LONGS_EQUAL(2, classes.size());
+}
+
 //******************************************************************************
 TEST(Class, Template) {
 

wrap/tests/testTemplate.cpp

@@ -47,6 +47,15 @@ TEST( Template, grammar ) {
   EXPECT(actual[2]==Qualified("Vector",Qualified::EIGEN));
   EXPECT(actual[3]==Qualified("Matrix",Qualified::EIGEN));
   actual.clear();
+
+  EXPECT(parse("template<N = {1,2,3,4}>", g, space_p).full);
+  EXPECT_LONGS_EQUAL(4, actual.intList().size());
+  EXPECT(actual.argName()=="N");
+  EXPECT_LONGS_EQUAL(1,actual.intList()[0]);
+  EXPECT_LONGS_EQUAL(2,actual.intList()[1]);
+  EXPECT_LONGS_EQUAL(3,actual.intList()[2]);
+  EXPECT_LONGS_EQUAL(4,actual.intList()[3]);
+  actual.clear();
 }
 
 //******************************************************************************

wrap/tests/testWrap.cpp

@@ -144,7 +144,7 @@ TEST( wrap, Small ) {
 TEST( wrap, Geometry ) {
   string markup_header_path = topdir + "/wrap/tests";
   Module module(markup_header_path.c_str(), "geometry",enable_verbose);
-  EXPECT_LONGS_EQUAL(7, module.classes.size());
+  EXPECT_LONGS_EQUAL(9, module.classes.size());
 
   // forward declarations
   LONGS_EQUAL(2, module.forward_declarations.size());
@@ -155,7 +155,7 @@ TEST( wrap, Geometry ) {
   strvec exp_includes; exp_includes += "folder/path/to/Test.h";
   EXPECT(assert_equal(exp_includes, module.includes));
 
-  LONGS_EQUAL(7, module.classes.size());
+  LONGS_EQUAL(9, module.classes.size());
 
   // Key for ReturnType::return_category
 //  CLASS = 1,