constexpr: Introduction
summary
Covers how constexpr moves computations into compilation: use constexpr functions and values, static_asserts, recursion to build a compile-time binary literal, constexpr constructors with bodies in C++14, and debugging tricks (run the same code at runtime, or force a link-time error by referencing an unresolved symbol inside a throw). Notes practical wins for embedded and thread-safe constant containers, warns that compile vs runtime FP may differ, and cites Annex B minima like 512 recursive invocations and over a million full expressions.
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chapters (10)
- 0:00Introduction and setup
- 10:07What is constexpr
- 22:00constexpr values and literals
- 32:04constexpr functions basics
- 44:45C++11 constexpr constraints
- 49:09C++14 constexpr improvements
- 53:58Compile-time parsing example
- 57:08Debugging constexpr code
- 1:00:24Runtime vs compile-time errors
- 1:03:58Q&A and summary
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