Question

我使用swig将c ++类包装到ruby代码中。我的一些课程返回其他课程的std:vector，因此我使用std_vector.i。

%include "std_vector.i"
namespace std {
  %template(VectorString) vector<string>;
  %template(VectorField) vector<TruckBoris::Field>;
  %template(VectorStructure) vector<TruckBoris::Structure>;
  %template(VectorEnum) vector<TruckBoris::Enum>;
}

对于Enum和Structure类，我有这样的警告：

parser.cpp:2781:9: warning: destination for this 'memset' call is a pointer to dynamic class 'TruckBoris::Enum'; vtable pointer will be overwritten [-Wdynamic-class-memaccess]
    memset(v_def,0,sizeof(Type));
           ^
parser.cpp:2807:66: note: in instantiation of member function 'swig::traits_as<TruckBoris::Enum, swig::pointer_category>::as' requested here
    return traits_as< Type, typename traits< Type >::category >::as(obj, te);
                                                             ^
parser.cpp:4236:92: note: in instantiation of function template specialization 'swig::as<TruckBoris::Enum>' requested here
    std::vector<TruckBoris::Enum,std::allocator< TruckBoris::Enum > >::value_type val = swig::as<std::vector<TruckBoris::Enum,std::allocator< TruckBoris::Enum > >::value_type>( elem...
                                                                                              ^
parser.cpp:2781:9: note: explicitly cast the pointer to silence this warning
    memset(v_def,0,sizeof(Type));
           ^
           (void*)

这只是一些警告，我的扩展程序正在编译并按预期工作。但如果有一些警告，我认为这意味着我可能在某处错了。

有关信息：

我没有来自像字段这样的简单类的警告，但是我有来自同一类继承的Enum和Structure类的警告。这是代码：

  class TagDeclaration
  {
    public:
      TagDeclaration(clang::TagDecl * var);
      ~TagDeclaration(){}
      void setPtr(clang::TagDecl * var); //for ruby interface
      clang::TagDecl * getPtr() const; //for ruby interface
      std::string getName() const;
      bool hasNameForLinkage()const;
      bool hasLinkage() const;
      std::string getTypedefName() const;
      std::string getRaw( clang::SourceManager & sm, const clang::LangOptions & lopt) const;
      virtual TagDeclaration& Equals( const TagDeclaration & tag);
    protected:
      clang::TagDecl * m_var; 
  };
  class Structure : public TagDeclaration
  {
    public:
      Structure();
      Structure(clang::TagDecl * var);
      ~Structure() {}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Woverloaded-virtual"
      virtual Structure& Equals(const Structure& tag);
#pragma clang diagnostic pop
      std::string getTagType() const;
      int getFieldsNumber() const;
      std::vector<Field> getFields() const;
      clang::FieldDecl * getField(int i) const;
    private:
      std::string m_tagType;
  };

编辑：

我可以用这个重现这种错误： test.h

class Number {
  public:
    Number()
    {
      m_num = 0;
    }
    Number(int a): m_num(a) {}
    ~Number() {}
    virtual void equals(){}
  private:
    int m_num;
};
class Float : public Number{
  public:
    Float(): Number() {}
    Float(int a): Number(a) {}
    ~Float() {}
    virtual void equals() {}
    void printToto(){}
};
class Double : public Number {
  public:
    Double(): Number() {}
    Double(int a): Number(a) {}
    ~Double() {}
    virtual void equals() {}
    void printTata();
};

test.i

%module "test"
%include "std_vector.i"
%{
#include "test.h"
%}
namespace std {
  %template(VectorFloat) vector<Float>;
};
%include "test.h"

extconf.rb

require "mkmf"
CONFIG['CXX']='clang++'
create_makefile("test")

与vector.i和类向量的swig警告消息

0 个答案: