method parse documentation in bbn\Util\Pparser
function($string)
{
if (!$string){
// no string, no data
return [];
}
if ($string[0] == '('){
// killer outer parens, as they're unnecessary
$string = substr($string, 1, -1);
}
$this->current = [];
$this->stack = [];
$this->string = $string;
$this->length = \strlen($this->string);
// look at each character
for ($this->position=0; $this->position < $this->length; $this->position++){
switch ($this->string[$this->position]){
case '(':
$this->push();
// push current scope to the stack an begin a new scope
array_push($this->stack, $this->current);
$this->current = [];
break;
case ')':
$this->push();
// save current scope
$t = $this->current;
// get the last scope from stack
$this->current = array_pop($this->stack);
// add just saved scope to current scope
$this->current[] = $t;
break;
/*
case ' ':
// make each word its own token
$this->push();
break;
*/
default:
// remember the offset to do a string capture later
// could've also done $buffer .= $string[$position]
// but that would just be wasting resources…
if ($this->buffer_start === null){
$this->buffer_start = $this->position;
}
}
}
return $this->current;
}
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