EMBRACING USER DEFINED LITERALS SAFELY for Types that Behave as though Built-in Pablo Halpern phalpern@halpernwightsoftware.com CppCon 2021 This work by Pablo Halpern is licensed under a Creative Talks in this series: ■ Embracing User Defined Literals Safely for Types that Behave as though Built-in – Pablo Halpern, Tuesday 9am ■ Embracing (and also destroying) Variant Types Safely – Andrei their own overload – Character and string literals can each have up to 5 overloads, one for each built-in character width: char, wchar_t, char8_t, char16_t, and char32_t. ■ Integer overflow results

intuitive to use. A small, expressive ORM Written in python with support for versions 2.7+ and 3.2+. Built-in support for SQLite, MySQL and Postgresql. numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. Speedups, which includes miscellaneous functions re-implemented with Cython DEBUG) logger.addHandler(logging.StreamHandler()) Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

small, expressive ORM Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) Built-in support for SQLite, MySQL and Postgresql. numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. Speedups, which includes miscellaneous functions re-implemented with Cython StreamHandler()) logger.setLevel(logging.DEBUG) Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

small, expressive ORM Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) Built-in support for SQLite, MySQL and Postgresql. numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. Speedups, which includes miscellaneous functions re-implemented with Cython DEBUG) logger.addHandler(logging.StreamHandler()) Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

expressive ORM • Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) • Built-in support for SQLite, MySQL and Postgresql. • numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. • Speedups, which includes miscellaneous functions re-implemented with Cython Contents: peewee Documentation, Release 3.5.0 1.5.17 Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

expressive ORM • Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) • Built-in support for SQLite, MySQL and Postgresql. • numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. • Speedups, which includes miscellaneous functions re-implemented with Cython Contents: peewee Documentation, Release 3.4.0 1.6.17 Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

expressive ORM • Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) • Built-in support for SQLite, MySQL and Postgresql. • numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. • Speedups, which includes miscellaneous functions re-implemented with Cython logger.addHandler(logging.StreamHandler()) 1.6.17 Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

small, expressive ORM Written in python with support for versions 2.7+ and 3.4+ (developed with 3.6) Built-in support for SQLite, MySQL and Postgresql. numerous extensions available (postgres hstore/json/arrays version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. Speedups, which includes miscellaneous functions re-implemented with Cython DEBUG) logger.addHandler(logging.StreamHandler()) Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from

version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. Speedups, which includes miscellaneous functions re-implemented with Cython StreamHandler()) logger.setLevel(logging.DEBUG) Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from efficient. Indexes on fields and multi-column indexes are not supported. The FTS5 extension comes with a built-in implementation of the BM25 ranking function. Therefore, the search and search_bm25 methods have

version, hosted on PyPI: pip install peewee Peewee comes with a couple C extensions that will be built if Cython is available. • Speedups, which includes miscellaneous functions re-implemented with Cython Contents: peewee Documentation, Release 3.6.0 1.5.17 Adding a new Database Driver Peewee comes with built-in support for Postgres, MySQL and SQLite. These databases are very popular and run the gamut from • Indexes on fields and multi-column indexes are not supported. The FTS5 extension comes with a built-in implementation of the BM25 ranking function. Therefore, the search and search_bm25 methods have