public function __construct(Formlet $formlet, FunctionValue $transform_builder, FunctionValue $transform_collector)
{
C::guardHasArity($transform_builder, 1);
C::guardHasArity($transform_collector, 1);
$this->_formlet = $formlet;
$this->_transform_builder = $transform_builder;
$this->_transform_collector = $transform_collector;
}
public function __construct(Collector $collector, FunctionValue $wrapper)
{
C::guardHasArity($wrapper, 2);
if ($collector->isNullaryCollector()) {
throw new Exception("It makes no sense to wrap around a nullary collector.");
}
$this->_collector = $collector;
$this->_wrapper = $wrapper;
}
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;
}));
}
/**
* Make a depth first search.
* Performs $transformation on every node that matches $predicate. If
* $transformation returns null, search will go on, if it returns a
* value, search will stop and return the value.
*/
public function depthFirst(FunctionValue $predicate, FunctionValue $transformation)
{
C::guardHasArity($predicate, 1);
C::guardHasArity($transformation, 1);
if ($predicate->apply(V::val($this))->get()) {
$res = $transformation->apply(V::val($this))->get();
if ($res !== null) {
return $res;
}
}
return $this->goDepth($predicate, $transformation);
}
public function __construct(Builder $builder, FunctionValue $transformation)
{
C::guardHasArity($transformation, 2);
$this->_builder = $builder;
$this->_transformation = $transformation;
}