I found that template method could be overloaded, can I do the same on template classes? If 2 template classes match a template class instantiation, we can use the parameter type in the constructor to deduce which one to use. template <typename T> class A{ A(T){} }; template <typename T> class A{ A(T*){} }; int main(){ A<int*> ...
I'm new to C++. Here is the code: template <class T> typename lw_slist { // .... some code private: typedef struct _slist_cell { _slist_cell *next; T data; } slist_cell; lw_slist::slist_cell *root; }; Give this compilation error: error C4430: missing type specifier - int ...
I have a string: B<T>::B() [with T = int] Is there any way I can get B<T> [with T = int] from this before run time somehow? :) EDIT: Simplifying: Is there any way to get X & Y separately from a static string XY defined as a preprocessor macro in any form before runtime? ...
Hello, I've got some problems with XSL : is it possible to use a template from another one, when it uses an apply-templates to print childs ? I don't want to use current node, but really create a new element matching the template. Example of what I'm searching : XML file : <root> <toto name="foo"> <b>hello</b> </toto> </root>...
Background: I have template stream operators (e.g. operator << (ostream &, std::vector <T>)) (that output container elements that may possibly be of some 8-bit integer type, (e.g. unsigned char, int_least8_t, et cetera). Problem: Default is that these types are output as char (ASCII). I only used char (or wchar_t or whatever) for ASCI...
The below code couldn't pass the compilation, what's the consideration for this compiler error? template<class T> void f(T t) {}; template<> void f<char>(char c = 'a') {} Error message: Default arguments are not allowed on an explicit specialization of a function template ...
Hi all! I would like to ask you for an advice about function template. I have a function that adds some data into buffer. But I need also to add an information about data type into the buffer. The type of data is a following enum: enum ParameterType { UINT, FLOAT, DOUBLE }; And I need to create a function template from funct...
Given the code below is there a nicer way to right it that doesn't repeat typename std::iterator_traits<T>::iterator_category twice? template<class T, class T2> struct foo : bar< foo<T, T2>, typename std::conditional< std::is_same<typename std::iterator_traits<T>::iterator_category, //R...
I have these template functions for use inline on device with cuda template <class T> __device__ inline T& cmin(T&a,T&b){return (a<b)?(a):(b);}; template <class T> __device__ inline T& cmax(T&a,T&b){return (a>b)?(a):(b);}; In the code I have cmin(z[i],y[j])-cmax(x[i],z[j]) for int arrays x,y,and z. I get the error: error: no ...
I was trying to write a templatized quicksort function. The thought in my head was that I would write a quicksort that can operate on any data structure that has a subscript operator and an order relation on the objects contained within it, so I could do things like quicksort<deque<int> >(); quicksort<vector<string> >(); etc. I star...
{{ p.date }} is displayed as: Date: 2010-10-29 21:56:39.226000 How do I make changes to how that's displayed? ...
Hello, I have a question about templates. I would like to have a templated class that contains, say, an array of either float's or double's. I can write a clone() function that duplicates it. No problem. However, I would like to have another function called cast() that does a translation back and forth between double and float. This ha...
If I have a box where people put comments, and then I display that comment like this...should I escape? {{ c.title }} ...
Let's say you're given http://nytimes.com How would you pull out the "main" image? The reason I'm asking is because Flipboard is able to grab the main image from a website, just using the URL. You could parse out all the image tags. But then what? ...
Hi all, I am getting an error I do not understand. There was even a similar question asked on SO that I found, but the fix given is already in my code. I am getting an error in this line: ForestNode<NODETYPE> foo = new ForestNode<NODETYPE> ForestNode(bar); that reads : \project 4\forest.h|85|error: expected ',' or ';' before 'Fores...
Hello everyone, Most of my classes have lists as private data members. As such, most of them also have adder/remover public members. I noticed I was writing basically the same thing for each of the adders, so I thought I'd turn it into a template. Here's what I've got: template <class N, class I> void add(N element, std::list<N> & con...
When there is a dictionary: menu = {'title': 'Link1', 'children': {'title': 'Child of Link1', 'children': #etc..} } How would one iterate over it so that the output becomes: <ul> <li>Link1 <ul> <li>Child of Link 1 <ul> <li>Grandchild of Link 1 ...
So I have beating my head against the wall on this. I feel like I have interpretted the docs and examples I found, but this just won't seem to go away. Here is the tag code: from google.appengine.ext import webapp register = webapp.template.create_template_register() def test_tag(): return "TEST!" register.simple_tag(test_tag...
How declare this: template<typename T> (T::ABC)& get(); it gives error: error: expected constructor, destructor, or type conversion before ‘&’ token ...
#ifndef ECORE_H #include "../database.h" #define ECORE_H Database *base_provider; // ecore.h: error: expected initializer before ‘*’ token template <class S, class T> class ecore { // error: expected class-name before ‘{’ token public: ~ecore(void){delete base_provider;}; ecore(vo...