++namedtuple - Python-style Named Tuples in C++20
summary
Shows a concrete C++20 library that reproduces Python-style named tuples: implements namedtuple{"price"_t = 42, "size"_t = 1'000} and name tags like "price"_t via user-defined literals and non-type template parameters (std::fixed_string), uses Concepts, new lambda features and UDLs, and provides operator[] lookup, structure-bindings by specializing std::tuple_size/tuple_element and get, JSON printing, and composition. Implementation is ~100 lines of TMP, it compiles and runs, and benchmarks show roughly a single-digit-to-~20% compile-time cost versus std::tuple.
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chapters (20)
- 0:00Start
- 1:31Agenda
- 11:26Json
- 13:42Raw Polymorphism
- 17:38Named Tuple
- 19:56Udl Approach
- 20:33Fixed String Implementation
- 20:46Implementation
- 25:06Name Tuple and Multiple Parameters
- 26:32Implement the Get by Name
- 30:40The Raw Polymorphism
- 32:09What Is Not Working
- 35:47Implement the Get
- 37:26Structure Bindings
- 37:47Function Expressions
- 38:55Printing the Tuple
- 39:56Packed Name Tuple
- 40:45Questions
- 44:22Json Implementation
- 52:02Debug Version
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