--- /dev/null
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\TabCompletion\Matcher;
+
+/**
+ * A constant name tab completion Matcher.
+ *
+ * This matcher provides completion for all defined constants.
+ *
+ * @author Marc Garcia <markcial@gmail.com>
+ */
+class ConstantsMatcher extends AbstractMatcher
+{
+ /**
+ * {@inheritdoc}
+ */
+ public function getMatches(array $tokens, array $info = array())
+ {
+ $const = $this->getInput($tokens);
+
+ return array_filter(array_keys(get_defined_constants()), function ($constant) use ($const) {
+ return AbstractMatcher::startsWith($const, $constant);
+ });
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function hasMatched(array $tokens)
+ {
+ $token = array_pop($tokens);
+ $prevToken = array_pop($tokens);
+
+ switch (true) {
+ case self::tokenIs($prevToken, self::T_NEW):
+ case self::tokenIs($prevToken, self::T_NS_SEPARATOR):
+ return false;
+ case self::hasToken(array(self::T_OPEN_TAG, self::T_STRING), $token):
+ case self::isOperator($token):
+ return true;
+ }
+
+ return false;
+ }
+}