function _pr_str($obj, $print_readably = True)
{
if (_list_Q($obj)) {
$ret = array();
foreach ($obj as $e) {
array_push($ret, _pr_str($e, $print_readably));
}
return "(" . implode(" ", $ret) . ")";
} elseif (_vector_Q($obj)) {
$ret = array();
foreach ($obj as $e) {
array_push($ret, _pr_str($e, $print_readably));
}
return "[" . implode(" ", $ret) . "]";
} elseif (_hash_map_Q($obj)) {
$ret = array();
foreach (array_keys($obj->getArrayCopy()) as $k) {
$ret[] = _pr_str($k, $print_readably);
$ret[] = _pr_str($obj[$k], $print_readably);
}
return "{" . implode(" ", $ret) . "}";
} elseif (is_string($obj)) {
if (strpos($obj, chr(0x7f)) === 0) {
return ":" . substr($obj, 1);
} elseif ($print_readably) {
$obj = preg_replace('/"/', '\\"', preg_replace('/\\\\/', '\\\\\\\\', $obj));
return '"' . $obj . '"';
} else {
return $obj;
}
} elseif (is_integer($obj)) {
return $obj;
} elseif ($obj === NULL) {
return "nil";
} elseif ($obj === true) {
return "true";
} elseif ($obj === false) {
return "false";
} elseif (_symbol_Q($obj)) {
return $obj->value;
} elseif (_atom_Q($obj)) {
return "(atom " . _pr_str($obj->value, $print_readably) . ")";
} elseif (_function_Q($obj)) {
return "(fn* [...] ...)";
} elseif (is_callable($obj)) {
// only step4 and below
return "#<function ...>";
} else {
throw new Exception("_pr_str unknown type: " . gettype($obj));
}
}
function _sequential_Q($seq)
{
return _list_Q($seq) or _vector_Q($seq);
}
}, '-' => function ($a, $b) {
return intval($a - $b, 10);
}, '*' => function ($a, $b) {
return intval($a * $b, 10);
}, '/' => function ($a, $b) {
return intval($a / $b, 10);
}, 'time-ms' => function () {
return time_ms();
}, 'list' => function () {
return call_user_func_array('_list', func_get_args());
}, 'list?' => function ($a) {
return _list_Q($a);
}, 'vector' => function () {
return call_user_func_array('_vector', func_get_args());
}, 'vector?' => function ($a) {
return _vector_Q($a);
}, 'hash-map' => function () {
return call_user_func_array('_hash_map', func_get_args());
}, 'map?' => function ($a) {
return _hash_map_Q($a);
}, 'assoc' => function () {
return call_user_func_array('assoc', func_get_args());
}, 'dissoc' => function () {
return call_user_func_array('dissoc', func_get_args());
}, 'get' => function ($a, $b) {
return get($a, $b);
}, 'contains?' => function ($a, $b) {
return contains_Q($a, $b);
}, 'keys' => function ($a) {
return keys($a);
}, 'vals' => function ($a) {
function seq($src)
{
if (_list_Q($src)) {
if (count($src) == 0) {
return NULL;
}
return $src;
} elseif (_vector_Q($src)) {
if (count($src) == 0) {
return NULL;
}
$tmp = $src->getArrayCopy();
$s = new ListClass();
$s->exchangeArray($tmp);
return $s;
} elseif (_string_Q($src)) {
if (strlen($src) == 0) {
return NULL;
}
$tmp = str_split($src);
$s = new ListClass();
$s->exchangeArray($tmp);
return $s;
} elseif (_nil_Q($src)) {
return NULL;
} else {
throw new Exception("seq: called on non-sequence");
}
return $s;
}