Lambdas from First Principles: A Whirlwind Tour of C++""
summary
Claim: lambdas are just syntactic sugar over ordinary C++ constructs and compile into anonymous functor classes with the same codegen as hand‑written classes. Demonstrations use Clang disassembly to show name mangling and instantiation patterns, show surprising pitfalls (static locals per instantiation, three puzzles), and compare C++11 vs C++14 init-capture and generic lambdas. Builds anonymous closure objects ($_0), shows they avoid heap/GC, and proves the approach produces identical machine code.
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chapters (11)
- 0:00Introduction to lambdas
- 1:28Plain old functions
- 8:49Member functions and operator()
- 13:38What is a lambda?
- 21:18Capture modes explained
- 28:01Puzzle: globals and captures
- 32:13Static locals in lambdas
- 43:43Generic lambdas
- 50:44Variadic lambdas
- 55:37Capturing parameter packs
- 58:12Q&A and summary
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