/**
*
* 单一关键字，如：null, false, true, undefined, new
* @param boolean $allowCalls
*/
public function exprAtomAst($allowCalls = false)
{
if ($this->isToken(FL_TOKEN_JS_OPERATOR, "new")) {
$this->getNextToken();
$this->newStatement();
}
if ($this->isToken(FL_TOKEN_JS_PUNC)) {
switch ($this->currentToken['value']) {
case "(":
$this->getNextToken();
$value = $this->expressionAst();
$this->expectToken(FL_TOKEN_JS_PUNC, ")");
return $this->subScripts($value, $allowCalls);
case "[":
$this->getNextToken();
return $this->subScripts($this->arrayStatement(), $allowCalls);
case "{":
$this->getNextToken();
return $this->subScripts($this->objectStatement(), $allowCalls);
}
$this->unexpectTokenError();
}
if ($this->isToken(FL_TOKEN_JS_KEYWORD, "function")) {
$this->getNextToken();
return $this->subScripts($this->functionStatement(false), $allowCalls);
}
if (Fl_Js_Static::isAtomStartType($this->currentToken['type'])) {
if ($this->currentToken['type'] === FL_TOKEN_JS_REGEXP) {
$atom = array("regexp", $this->currentToken['value'][0], $this->currentToken['value'][1]);
} else {
$atom = array($this->currentToken['type'], $this->currentToken['value']);
}
$this->getNextToken();
return $this->subScripts($atom, $allowCalls);
}
$this->unexpectTokenError();
}
