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method-signature-variance-contravariant.php
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method-signature-variance-contravariant.php
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<?php
namespace MethodSignatureVarianceContravariant;
/** @template-contravariant T */
interface In {
}
/** @template-covariant T */
interface Out {
}
/** @template T */
interface Invariant {
}
/**
* @template-contravariant K
*/
class A {
/**
* @param K $a
* @param In<K> $b
* @param In<In<K>> $c
* @param In<Out<K>> $d
* @param In<Out<Invariant<K>>> $e
* @param In<Invariant<In<K>>> $f
* @param Out<K> $g
* @param Out<Out<K>> $h
* @param Out<In<K>> $i
* @param Out<In<Invariant<K>>> $j
* @param Out<Invariant<Out<K>>> $k
* @param Invariant<K> $l
* @param Invariant<Invariant<K>> $m
* @param Invariant<Out<In<K>>> $n
* @return K
*/
function a($a, $b, $c, $d, $e, $f, $g, $h, $i, $j, $k, $l, $m, $n) {}
/** @return In<K> */
function b() {}
/** @return In<In<K>> */
function c() {}
/** @return In<Out<K>> */
function d() {}
/** @return In<Out<Invariant<K>>> */
function e() {}
/** @return Out<K> */
function f() {}
/** @return Out<Out<K>> */
function g() {}
/** @return Out<In<K>> */
function h() {}
/** @return Out<In<Invariant<K>>> */
function i() {}
/** @return Invariant<K> */
function j() {}
/** @return Invariant<Invariant<K>> */
function k() {}
/** @return Invariant<In<Out<K>>> */
function l() {}
/** @return Invariant<Out<In<K>>> */
function m() {}
}