public static function collect()
{
$collector = V::fn_w(function ($array, Value $v) use(&$collector) {
if (!($v->isError() || $v->isApplicable()) && $v->get() instanceof Stop) {
// Postprocessing of the collected values.
// We need to check weather there are errors in the collection
// to be able to get errors appropriately.
$errors = array();
$vals = array_map(function ($v) use(&$errors) {
$v = $v->force();
if ($v->isError()) {
$errors[] = $v;
return $v;
}
if ($v->isApplicable()) {
return $v;
}
return $v->get();
}, $array->get());
if (count($errors) > 0) {
return V::error("Collection contains errors.", "_collect", $errors);
}
return V::val($vals, "collect");
}
$array = $array->get();
$array[] = $v->force();
return $collector->apply(V::val($array));
});
return $collector->apply(V::val(array()));
}
public final function satisfies(FunctionValue $predicate, $error)
{
C::guardIsString($error);
C::guardHasArity($predicate, 1);
return $this->map(V::fn_w(function ($value) use($predicate, $error) {
if (!$predicate->apply($value)->get()) {
return V::error($error, $value->origin());
}
return $value;
}));
}
/**
* One can get a dictionary out of an error that contains the error messages
* from the error itself and all the other errors that led to it.
*/
public function testErrorToDict()
{
$a = V::error("a", "a");
$b = V::error("b", "b");
$c = V::error("c", "c");
$x1 = V::error("1", "x");
$x2 = V::error("2", "x");
$all = V::error("all", "all", array($a, $b, $c, $x1, $x2));
$dict = $all->toDict();
$this->assertArrayHasKey("a", $dict);
$this->assertArrayHasKey("b", $dict);
$this->assertArrayHasKey("c", $dict);
$this->assertArrayHasKey("x", $dict);
$this->assertArrayHasKey("all", $dict);
$this->assertCount(5, $dict);
$this->assertEquals($dict["a"], array("a"));
$this->assertEquals($dict["b"], array("b"));
$this->assertEquals($dict["c"], array("c"));
$this->assertEquals($dict["x"], array("1", "2"));
$this->assertEquals($dict["all"], array("all"));
}
private function rawActualCall()
{
if ($this->_unwrap_args) {
$args = array();
$errors = array();
$this->evalArgs($args, $errors);
if (count($errors) > 0) {
return V::error("Function arguments contain errors.", $this->origin(), $errors);
}
} else {
$args = $this->_args;
}
return call_user_func_array($this->_function, $args);
}
