public function testFunc()
{
$fl = new I\FL('twice(3.14)');
$this->assertEquals($fl->evaluate(), '6.28');
$fl = new I\FL('PI()');
$this->assertEquals($fl->evaluate(), pi());
$fl = new I\FL('sum(cos(0), 2, 3, twice(2), 5)');
$this->assertEquals($fl->evaluate(), '15');
$fl = new I\FL('sum(cos(0), 2, 3, twice(2), 5)');
$ctx = new I\IContext();
$ctx->regFunction('sum', function () {
return implode('', func_get_args());
});
$this->assertEquals($fl->evaluate($ctx), '12345');
}
