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C++ High Performance

You're reading from   C++ High Performance Boost and optimize the performance of your C++17 code

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Product type Paperback
Published in Jan 2018
Publisher Packt
ISBN-13 9781787120952
Length 374 pages
Edition 1st Edition
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Authors (2):
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Viktor Sehr Viktor Sehr
Author Profile Icon Viktor Sehr
Viktor Sehr
Björn Andrist Björn Andrist
Author Profile Icon Björn Andrist
Björn Andrist
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Table of Contents (13) Chapters Close

Preface 1. A Brief Introduction to C++ FREE CHAPTER 2. Modern C++ Concepts 3. Measuring Performance 4. Data Structures 5. A Deeper Look at Iterators 6. STL Algorithms and Beyond 7. Memory Management 8. Metaprogramming and Compile-Time Evaluation 9. Proxy Objects and Lazy Evaluation 10. Concurrency 11. Parallel STL 12. Other Books You May Enjoy

The iterator concept

Before going further into STL algorithms, we are going to take a deeper look at iterators in C++, as they form the basis of STL algorithms. Note that the iterator concept is not at all a C++ exclusive concept, rather it exists in most programming languages. What differentiates the C++ implementation of the iterator concept from other programming languages is that C++ mimics the syntax of raw memory pointers.

A simplified basic iterator is an object which represent a position in a sequence and therefore basically incorporate the following functionality:

  • Are we out of the sequence? (denoted as is_end() -> bool)
  • Retrieve the value at the current position (denoted read() -> T)
  • Step to the next position (denoted step_fwd() -> void)
Note that the named functions is_end(), read() and so on, does not exist in C++, they are only here for readability. In...
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