template « constructor

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C Q&A » constructor » template

1. templated constructor for nested classes bytes.com

Remember you are using templates. These are patterns the compiler copies and substitutes a specific type for the template type. That means the templates all have to be in one or more header files that are included. You cannot use a separate .cpp file as you can with actual code. It also means that all unbound functions used by the class ...

2. Template constructors of template classes bytes.com

Daniel Pitts wrote: I have a template: template class MyTemplate { public: template MyTemplate() { bar::something(foo); } } > How would I instantiate a local instance of this class? > MyTemplate() doesn't seem to work. Are you trying to create a temporary of that type? Nor does any other things I've tried. You can't. A template[d] ...

3. Determine constructor from template bytes.com

Basically, I want a templated method to do one thing if the type T has a constructor that takes a std::istringstream, and another thing if it doesn't. The problem is that if I put the T(std::istringstream) call in there, every type that is used for that method has to have that constructor or it errors. Can someone please point me in ...

4. Templated constructor behaviour bytes.com

Neelesh Bodas wrote: the example given by me, I said that int main() { X(helloworld);} is semantically equivalent to (aka "same as" ) int main() { X helloworld;} Ahhh, I learnt something. Your're right. I was thinking about this case: struct X { int foo(); }; int f1() { X helloworld; helloworld.foo(); return 0; } int f2() { X helloworld(); helloworld(); ...

5. Q: why are all templated copy-constructors necessary? bytes.com

Alf P. Steinbach wrote: * Victor Bazarov: >Claudius wrote: >>Hello, >>> >>in my class TopTen I need to define three constructors while only >>the last one, the most general in terms of templates, should be >>sufficient in my opinion: >>> >>template >>TopTen::TopTen( const TopTen>tten ); >> >As I understand it, the above is the ...

6. How to call templated constructor explicitly? bytes.com

How does one call a templated constructor inside of a class when instantiating an object? I made up a quick sample to demonstrate. #include class TestClass { public: template TestClass() { std::cout << "Called with type " << typeid(T).name() << std::endl; } }; int main() { TestClass testClass; // Error: How do I call the constructor and tell ...

7. templated code not able to call correct constructor bytes.com

Keith Halligan I'm switching from the HP-UX compiler aCC 5.55 to aCC 6.13 and I get the following error: "templateptr.h", line 20: error #2289: no instance of constructor "defclass::base::base" matches the argument list argument types are: (obj *) : defclass::base(p) ^ detected during instantiation of "templateptr::templateptr(T *) [with T=obj]" at line 50 of "starter.h" Since an obj is derived from a ...

8. (template metaprogramming) conditional inclusion of the default constructor bytes.com

std::pair explicitly defines a default constructor. This makes it impossible to instantiate it with a type that does not have a default constructor (or it is private). I wonder if it would be possible to define std::pair in such a way (using template metaprogramming) that the default constructor is defined if and only if both of pair's argument types are default- ...

9. Problem /w constructor in template bytes.com

Hello! The following code compiles with msvc-7.1, but gcc-3.4.4 fails. I fail too, in seeing why. #include #include #include class ThrowableErrorCode { friend class ErrorCode; CODE m_code; bool m_throw; public: //! constructor - receive ...

10. class templates & constructor defn outside the class bytes.com

gopal wrote:[color=blue] > I have the following class template declaration > > //class template declaration > template class A { > public: > T t1; > A(T); > }; > > I would like to define the class A constrcutor outside. Any help > please? >[/color] Well that all depends on how your compiler looks for class template member ...

11. explicit invocation of a constructor template of a class template bytes.com

* benben:[color=blue] > Say I have a class template: > > template > class myclass > { > public: > > template > myclass(void ) > { > U u; > // do something with u > } > }; > > My question is how to construct a myclass object using the > myclass::myclass constructor?[/color] Consider ...

12. Deque/DNode Template Classes Constructor forums.devshed.com

I want to first start off by saying this is a homework assignment but I do want to make it clear that I'm not asking for anyone to write my assignment. The entire program is coded besides for these last errors I'm getting. I've asked people that I know and we still can't figure it out. I am using VS .NET ...

template « constructor « C Q&A