private function lintPHP54Features(XHPASTNode $root)
{
$indexes = $root->selectDescendantsOfType('n_INDEX_ACCESS');
foreach ($indexes as $index) {
switch ($index->getChildByIndex(0)->getTypeName()) {
case 'n_FUNCTION_CALL':
case 'n_METHOD_CALL':
$this->raiseLintAtNode($index->getChildByIndex(1), pht('The `%s` syntax was not introduced until PHP 5.4, but this ' . 'codebase targets an earlier version of PHP. You can rewrite ' . 'this expression using `%s`.', 'f()[...]', 'idx()'));
break;
}
}
$literals = $root->selectDescendantsOftype('n_ARRAY_LITERAL');
foreach ($literals as $literal) {
$open_token = head($literal->getTokens())->getValue();
if ($open_token == '[') {
$this->raiseLintAtNode($literal, pht('The short array syntax ("[...]") was not introduced until ' . 'PHP 5.4, but this codebase targets an earlier version of PHP. ' . 'You can rewrite this expression using `array(...)` instead.'));
}
}
$closures = $this->getAnonymousClosures($root);
foreach ($closures as $closure) {
$static_accesses = $closure->selectDescendantsOfType('n_CLASS_STATIC_ACCESS');
foreach ($static_accesses as $static_access) {
$class = $static_access->getChildByIndex(0);
if ($class->getTypeName() != 'n_CLASS_NAME') {
continue;
}
if (strtolower($class->getConcreteString()) != 'self') {
continue;
}
$this->raiseLintAtNode($class, pht('The use of `%s` in an anonymous closure is not ' . 'available before PHP 5.4.', 'self'));
}
$property_accesses = $closure->selectDescendantsOfType('n_OBJECT_PROPERTY_ACCESS');
foreach ($property_accesses as $property_access) {
$variable = $property_access->getChildByIndex(0);
if ($variable->getTypeName() != 'n_VARIABLE') {
continue;
}
if ($variable->getConcreteString() != '$this') {
continue;
}
$this->raiseLintAtNode($variable, pht('The use of `%s` in an anonymous closure is not ' . 'available before PHP 5.4.', '$this'));
}
}
$numeric_scalars = $root->selectDescendantsOfType('n_NUMERIC_SCALAR');
foreach ($numeric_scalars as $numeric_scalar) {
if (preg_match('/^0b[01]+$/i', $numeric_scalar->getConcreteString())) {
$this->raiseLintAtNode($numeric_scalar, pht('Binary integer literals are not available before PHP 5.4.'));
}
}
}
