C++ concepts: LessThanComparable
From cppreference.com
The type must work with < operator and the result should have standard semantics.
Requirements
The type T satisfies LessThanComparable if
Given
-
a,b, andc, expressions of typeTorconst T
The following expressions must be valid and have their specified effects
| Expression | Return type | Requirements |
|---|---|---|
| a < b | implicitly convertible to bool | Establishes strict weak ordering relation with the following properties
|
Notes
To satisfy this requirement, types that do not have built-in comparison operators have to provide a user-defined operator<
For the types that are both EqualityComparable and LessThanComparable, the C++ standard library makes a distinction between equality, which is the value of the expression a == b and equivalence, which is the value of the expression !(a < b) && !(b < a).
See also
a BinaryPredicate that establishes an ordering relation (concept) |