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Enum member std.traits.isOrderingComparable
Detects whether T
is a comparable type. Basic types and structs and
classes that implement opCmp are ordering comparable.
enum isOrderingComparable(T)
= is(typeof((ref T a) => a < a ? 1 : 0));
Example
static assert(isOrderingComparable!int);
static assert(isOrderingComparable!string);
static struct Foo {}
static assert(!isOrderingComparable!Foo);
static struct Bar
{
int a;
auto opCmp(Bar b1) const { return a - b1 .a; }
}
Bar b1 = Bar(5);
Bar b2 = Bar(7);
assert(isOrderingComparable!Bar && b2 > b1);
Authors
Walter Bright,
Tomasz Stachowiak (isExpressions
),
Andrei Alexandrescu,
Shin Fujishiro,
Robert Clipsham,
David Nadlinger,
Kenji Hara,
Shoichi Kato
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.