Move Slow and Break Things - Upgrading to C++26
summary
C++26 makes concrete, breaking changes: it removes comparisons between arrays and several deprecated library facets, forbids delete of incomplete types, and drops std::stirstream plus fragile Unicode/conversion facets while adding 14 headers (contracts, reflection, concurrency pieces). The preprocessor gains required diagnostics for previously undefined macro abuses, new contextual keywords (pre post contract_assert), and contracts plus hardened library checks for bounds/optional/expected that may terminate. Vendors use zombie names to phase out legacy features, so migration and diagnostics are the practical tools.
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chapters (7)
- 0:00C++ evolution and technical debt
- 10:09Deprecation and removal of features
- 27:39Breaking changes in core language
- 43:27Undefined behavior in preprocessor
- 58:11Optimizer improvements and indexing
- 1:03:09Standard library changes and headers
- 1:17:24Contracts and library hardening
