Generic Programming Without (Writing Your Own) Templates
summary
Shows concrete replacements for hand-rolled templates using C++17/C++20: use std::span (or GSL span) to accept any contiguous range and avoid template bloat but beware const placement and dangling lifetimes; return heterogeneous results with std::variant (example: quadratic solver returning monostate / double / pair<double,double>) and handle cases with visit/overload; use std::any for truly dynamic values but expect heap allocations and runtime type checks; std::function trades compile-time templates for runtime type-erasure and possible allocations.
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chapters (10)
- 0:00Intro
- 1:04Templates
- 6:23How to use a span
- 8:54Pitfalls
- 20:24a type-safe union?
- 23:08Example
- 30:07overload pattern
- 35:39void
- 40:36Use cases
- 49:03function_ref
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