A Tour of C++

5. Templates

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– B. Stroustrup

• Introduction

• Parameterized Types

• Function Templates

• Concepts and Generic Programming

• Function Objects

• Variadic Templates

• Aliases

• Template Compilation Model

• Advice

5.1. Introduction

Someone who wants a vector is unlikely always to want a vector of doubles. A vector is a general concept, independent of the notion of a floating-point number. Consequently, the element type of a vector ought to be represented independently. A template is a class or a function that we parameterize with a set of types or values. We use templates to represent concepts that are best understood as something very general from which we can generate specific types and functions by specifying arguments, such ...