Introduces the boolean-testable exposition-only concept.
Other papers in Standard library concepts
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CommonReference requirement from StrictWeakOrderingSan Diego 2018P1754R1Rename concepts to standard_case for C++20, while we still canCologne 2019P1871R1Concept traits should be named after conceptsBelfast 2019P2102R0Make 'implicit expression variations' more explicitPrague 2020All 6 papers in Standard library concepts →