templates

问题 I need to check is some integer prime in compile time (to put the boolean value as template argument). I've write code that do it well: #include <type_traits> namespace impl { template <int n, long long i> struct PrimeChecker { typedef typename std::conditional< (i * i > n), std::true_type, typename std::conditional< n % i == 0, std::false_type, typename PrimeChecker<n, (i * i > n ) ? -1 : i + 1>::type >::type >::type type; }; template <int n> struct PrimeChecker<n, -1> { typedef void type; }

问题 This question already has answers here : How to call a function on all variadic template args? (3 answers) Closed 6 years ago . Consider I have a variadic template with int... parameters. For example a function like this: template<int... t> int add(){ return t... + ??? } All the method should do is adding all the parameters. It can be easily achieved using recursive variadic templates. However, is it also possible expressing this (or something similar like using other binary operators to

问题 This question already has answers here : How to call a function on all variadic template args? (3 answers) Closed 6 years ago . Consider I have a variadic template with int... parameters. For example a function like this: template<int... t> int add(){ return t... + ??? } All the method should do is adding all the parameters. It can be easily achieved using recursive variadic templates. However, is it also possible expressing this (or something similar like using other binary operators to

问题 This question already has answers here : How to call a function on all variadic template args? (3 answers) Closed 6 years ago . Consider I have a variadic template with int... parameters. For example a function like this: template<int... t> int add(){ return t... + ??? } All the method should do is adding all the parameters. It can be easily achieved using recursive variadic templates. However, is it also possible expressing this (or something similar like using other binary operators to

问题 Because someone in our group hates exceptions (let's not discuss that here), we tend to use error-checking macros in our C++ projects. I have encountered an odd compilation failure when using a templated function with two type parameters. There are a few errors (below), but I think the root cause is a warning: warning C4002: too many actual parameters for macro 'BOOL_CHECK_BOOL_RETURN' Probably best explained in code: #include "stdafx.h" template<class A, class B> bool DoubleTemplated(B &

问题 I'm programming in c++ using sublimetext3. My program has a superclass called Array, and a subclass called IntArray. Both classes are template classes. Currently, I'm having trouble compiling the program. It keeps giving me an error in my IntArray.cpp file, specifically in my base class's constructor where I call and initialize the superclass's constructor with the parameter of the base class's constructor. I'm not sure how to call a superclass's template constructor from a subclass's

问题 I figured that the latest build release would allow me to use ejs globally without using node so I tried doing so. Though, when I try to use ejs.renderFile(params...), i get the error: TypeError: exports.fileLoader is not a function Which is just another node module. Is there a way to get around this? Note: This is the only time we use EJS at my company, so, if not, would you kindly point me in a good direction in how to render .ejs files. 回答1: Update: You can create an EJS object by running

问题 I figured that the latest build release would allow me to use ejs globally without using node so I tried doing so. Though, when I try to use ejs.renderFile(params...), i get the error: TypeError: exports.fileLoader is not a function Which is just another node module. Is there a way to get around this? Note: This is the only time we use EJS at my company, so, if not, would you kindly point me in a good direction in how to render .ejs files. 回答1: Update: You can create an EJS object by running

问题 I figured that the latest build release would allow me to use ejs globally without using node so I tried doing so. Though, when I try to use ejs.renderFile(params...), i get the error: TypeError: exports.fileLoader is not a function Which is just another node module. Is there a way to get around this? Note: This is the only time we use EJS at my company, so, if not, would you kindly point me in a good direction in how to render .ejs files. 回答1: Update: You can create an EJS object by running

问题 I've decided to use DataBinding library for my Android project. Are there any plugins/code templates available to install into Android Studio to get new Activity / Fragment etc added using Android Studio's wizard auto generated code compatible with DataBinding? I need to create models/presenters/variables in xml every time, can I get them to be generated automatically? 回答1: you can ALT + Enter on your view root then convert into databinding layout . 回答2: Well,it's not fully what am I looking