“Meta: Thoughts on generative C++”
summary
Two years of proposals boil down to concrete design sketches and a working prototype that demonstrate naming class categories and generating code at compile time. Metaclasses let a single opt-in word enforce defaults, inject constructors and comparisons, and reject forbidden members; a three-way comparison cuts ~18 operator overloads to two; compile-time work uses constexpr blocks and reflection plus constexpr injection to emit definitions while keeping runtime cost zero; a Clang prototype on godbolt.org shows generated output for debugging.
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chapters (10)
- 0:00Introduction and welcome
- 2:28Spaceship operator proposal
- 5:23Simplifying C++ with new features
- 10:28Foundation for generative C++
- 16:40Reflection in C++
- 18:30Compile-time code expansion
- 26:26Abstractions and tool support
- 34:17Metaclasses overview
- 51:54Metaclass examples and benefits
- 1:31:18Q&A session
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