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Document number: N3531

Date: 2013-03-08

User-defined Literals for Standard Library Types (version 3)

by Peter Sommerlad

Excerpt:

The standard library is lacking pre-defined user-defined literals, even though the standard reserves names not starting with an underscore for it. Even the sequence of papers that introduced UDL to the standard contained useful examples of suffixes for creating values of standard types such as s for std::string, h for std::chrono::hours and i for imaginary parts of complex numbers.

Discussion on the reflector in May 2012 and in Portland Oct 2012 showed demand for some or even many pre-defined UDL operators in the standard library...