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Traits classes

September 18th, 2014

Introduction

In this final article we’ll have a look at the issue of communicating template type information between different template instantiations, and have a look at the Traits mechanism as a method of solving these issues.

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Template specialisation

September 4th, 2014

Introduction

Welcome back to the wonderful world of templates.

So far, we have looked at what are known as base templates. In this article we’re going to look at one of the more confusing aspects of templates – specialisation. The choice of the word specialisation is unfortunate, as many confuse it with inheritance and sub-typing; in this case specialised means “more specific”.

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Templates of templates

August 21st, 2014

Introduction

In this brief article we’ll have a look at the topic of building template classes whose parameters are themselves templates.

I’m assuming you’re reasonably familiar with template classes.  If not, here’s a quick introduction.

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Variadic templates

August 7th, 2014

Introduction

In this article we’re going to look at a new feature of templates in C++11 – the concept of the variadic template.

Variadic templates allow us to create functions and classes, not only with generic types, but also a variable number of generic types.

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Template member functions

July 24th, 2014

Introduction

Previously we’ve looked at template functions and we’ve looked at template classes. This time, let’s look at what happens when you combine them.

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Templates and polymorphism

July 10th, 2014

Introduction

Template functions and classes tend to cause consternation amongst programmers. The conversation tends to go something like this:

  • I understand the syntax of templates (although it’s ugly)
  • I get the idea of replacing function-like macros with template functions
  • I can see the application of template classes for containers
  • Most containers and generic functions are library code
  • I don’t write libraries
  • What’s the point of me using templates?

In this article we’re going to look at an application of templates beyond writing library code – replacing run-time polymorphism (interfaces) with compile-time polymorphism. This idea is known as a Policy. The idea is reminiscent of the Strategy Pattern, but uses templates rather than interfaces.

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Template inheritance

June 19th, 2014

Introduction

Previously we looked at template class syntax and semantics. In this article we’ll extend this to look at inheritance of template classes.

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Template classes

June 12th, 2014

Introduction

Last time we looked at template functions, which introduced the concept of generic programming in C++.

This time let’s extend the idea of generic programming to classes.

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An introduction to C++ templates

May 29th, 2014

Introduction

Templates are a very powerful – but often very confusing – mechanism within C++. However, approached in stages, templates can be readily understood (despite their heinous syntax).

The aim of this series of articles is to guide beginners through the syntax and semantics of the foundation concepts in C++ template programming.

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Demystifying C++ lambdas

March 7th, 2014

A new (but not so welcome?) addition

Lambdas are one of the new features added to C++ and seem to cause considerable consternation amongst many programmers. In this article we’ll have a look at the syntax and underlying implementation of lambdas to try and put them into some sort of context.

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