CppCon 2017: Ben Deane & Jason Turner “constexpr ALL the Things!”

In this podcast episode, the hosts dive into the exciting world of constexpr programming in C++. They explore how to embed and parse JSON literals at compile time, which boosts both performance and configurability. Jason Turner and Ben Deane trace the development of constexpr from its inception in C++11 to its current use in C++17, sharing insights on the challenges of building constexpr containers and a reliable JSON parser. They discuss the shortcomings of standard libraries, the design of parser combinators, optimization strategies, and the future possibilities for regex parsing. Overall, the episode highlights the ongoing progress and proposals needed to unlock the full potential of constexpr, making for a fascinating conversation about the future of C++ programming.

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CppCon

Introduction and Overview of Constexpr JSON Parsing

Evolution of Constexpr and its Challenges

Implementing Constexpr Containers: Strings and Vectors

Constexpr Maps and Standard Library Limitations

Advanced Constexpr Containers and JSON Representation

Addressing Shortcomings and Parser Design

Building Parser Combinators

Advanced Parser Combinators and JSON Parsing

Optimizing JSON Parsing for Compile-Time Efficiency

Removing Size Limits and Final JSON Parser Implementation

Constexpr Regular Expressions and Future Directions

Debugging Constexpr Code and Future Proposals

CppCon 2017: Ben Deane & Jason Turner “constexpr ALL the Things!”

CppCon

00:00Introduction and Overview of Constexpr JSON Parsing

Introduction and Overview of Constexpr JSON Parsing

03:03Evolution of Constexpr and its Challenges

Evolution of Constexpr and its Challenges

04:49Implementing Constexpr Containers: Strings and Vectors

Implementing Constexpr Containers: Strings and Vectors

09:56Constexpr Maps and Standard Library Limitations

Constexpr Maps and Standard Library Limitations

15:17Advanced Constexpr Containers and JSON Representation

Advanced Constexpr Containers and JSON Representation

20:59Addressing Shortcomings and Parser Design

Addressing Shortcomings and Parser Design

27:25Building Parser Combinators

Building Parser Combinators

35:33Advanced Parser Combinators and JSON Parsing

Advanced Parser Combinators and JSON Parsing

41:06Optimizing JSON Parsing for Compile-Time Efficiency

Optimizing JSON Parsing for Compile-Time Efficiency

47:45Removing Size Limits and Final JSON Parser Implementation

Removing Size Limits and Final JSON Parser Implementation

55:19Constexpr Regular Expressions and Future Directions

Constexpr Regular Expressions and Future Directions

57:52Debugging Constexpr Code and Future Proposals

Debugging Constexpr Code and Future Proposals