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/*
* Copyright (C)2005-2019 Haxe Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package php;
/**
Generator is not a Haxe Iterable. It can be iterated one time only.
Unfortunately Haxe does not know that in PHP generators may have no `return` expression or `return value` with any type of `value`.
Use `return null` or untyped cast to workaround this issue:
```haxe
function generatorWithoutReturn():Generator {
php.Syntax.yield(1);
return null;
}
function generatorWithReturn():Generator {
php.Syntax.yield(1);
return cast "hello";
}
var g = generatorWithReturn();
for(i in g) {
trace(i);
}
trace(g.getReturn()); // "hello"
```
@see http://php.net/manual/en/class.generator.php
**/
@:native('Generator')
extern class Generator {
function current():Dynamic;
function getReturn():Dynamic;
function key():Dynamic;
function next():Void;
function rewind():Void;
function send(value:Dynamic):Dynamic;
@:native('throw')
function throwError(exception:Throwable):Dynamic;
function valid():Bool;
inline function iterator():GeneratorIterator {
return new GeneratorIterator(this);
}
}
private class GeneratorIterator {
var generator:Generator;
/**
This field is required to maintain execution order of .next()/.valid()/.current() methods.
@see http://php.net/manual/en/class.iterator.php
**/
var first:Bool = true;
public inline function new(generator:Generator) {
this.generator = generator;
}
public inline function hasNext():Bool {
if (first) {
first = false;
} else {
generator.next();
}
return generator.valid();
}
public inline function next():Dynamic {
return generator.current();
}
}
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