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101 lines
2.9 KiB
PHP
101 lines
2.9 KiB
PHP
--TEST--
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Closure 041: Rebinding: preservation of previous scope when not given as arg unless impossible
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--FILE--
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<?php
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/* It's impossible to preserve the previous scope when doing so would break
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* the invariants that, for non-static closures, having a scope is equivalent
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* to having a bound instance. */
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$staticUnscoped = static function () {
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echo "scoped to A: "; var_dump(isset(A::$priv));
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echo "bound: ", isset($this)?get_class($this):"no";
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};
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$nonstaticUnscoped = function () {
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echo "scoped to A: "; var_dump(isset(A::$priv));
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echo "bound: ", isset($this)?get_class($this):"no";
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};
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class A {
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private static $priv = 7;
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function getClosure() {
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return function () {
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echo "scoped to A: "; var_dump(isset(A::$priv));
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echo "bound: ", isset($this)?get_class($this):"no";
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};
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}
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function getStaticClosure() {
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return static function () {
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echo "scoped to A: "; var_dump(isset(A::$priv));
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echo "bound: ", isset($this)?get_class($this):"no";
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};
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}
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}
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class B extends A {}
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$a = new A();
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$staticScoped = $a->getStaticClosure();
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$nonstaticScoped = $a->getClosure();
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echo "Before binding", "\n";
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$staticUnscoped(); echo "\n";
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$nonstaticUnscoped(); echo "\n";
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$staticScoped(); echo "\n";
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$nonstaticScoped(); echo "\n";
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echo "After binding, no instance", "\n";
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$d = $staticUnscoped->bindTo(null); $d(); echo "\n";
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$d = $nonstaticUnscoped->bindTo(null); $d(); echo "\n";
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$d = $staticScoped->bindTo(null); $d(); echo "\n";
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$d = $nonstaticScoped->bindTo(null); var_dump($d); echo "\n";
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echo "After binding, with same-class instance for the bound ones", "\n";
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$d = $staticUnscoped->bindTo(new A);
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$d = $nonstaticUnscoped->bindTo(new A); $d(); echo " (should be scoped to dummy class)\n";
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$d = $staticScoped->bindTo(new A);
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$d = $nonstaticScoped->bindTo(new A); $d(); echo "\n";
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echo "After binding, with different instance for the bound ones", "\n";
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$d = $nonstaticUnscoped->bindTo(new B); $d(); echo " (should be scoped to dummy class)\n";
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$d = $nonstaticScoped->bindTo(new B); $d(); echo "\n";
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echo "Done.\n";
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?>
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--EXPECTF--
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Before binding
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scoped to A: bool(false)
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bound: no
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scoped to A: bool(false)
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bound: no
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scoped to A: bool(true)
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bound: no
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scoped to A: bool(true)
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bound: A
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After binding, no instance
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scoped to A: bool(false)
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bound: no
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scoped to A: bool(false)
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bound: no
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scoped to A: bool(true)
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bound: no
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Warning: Cannot unbind $this of closure using $this in %s on line %d
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NULL
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After binding, with same-class instance for the bound ones
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Warning: Cannot bind an instance to a static closure in %s on line %d
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scoped to A: bool(false)
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bound: A (should be scoped to dummy class)
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Warning: Cannot bind an instance to a static closure in %s on line %d
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scoped to A: bool(true)
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bound: A
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After binding, with different instance for the bound ones
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scoped to A: bool(false)
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bound: B (should be scoped to dummy class)
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scoped to A: bool(true)
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bound: B
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Done.
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