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4b821f0fc6
Move all rebinding checks into one function to make sure they stay in sync. Normalize return value to be NULL for all rebinding failures, instead of returning an improperly bound closure in some cases.
101 lines
2.8 KiB
PHP
101 lines
2.8 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); $d(); echo "\n";
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// $d is still non-static
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$d->bindTo($d);
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echo "After binding, with same-class instance for the bound ones", "\n";
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$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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--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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scoped to A: bool(true)
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bound: no
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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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