nikic / PHP-Parser

                return 'substr(' . $args[0] . ', 1)';

            }

            if ('parseEncapsed' == $name) {

                assertArgs(3, $args, $name);

                return 'foreach (' . $args[0] . ' as $s) { if ($s instanceof Node\Scalar\EncapsedStringPart) {'

                     . ' $s->value = Node\Scalar\String_::parseEscapeSequences($s->value, ' . $args[1] . ', ' . $args[2] . '); } }';

            }

            if ('parseEncapsedDoc' == $name) {

                assertArgs(2, $args, $name);

                     . ' $s->value = Node\Scalar\String_::parseEscapeSequences($s->value, ' . $args[1] . ', ' . $args[2] . '); } }';

            }

            if ('parseEncapsedDoc' == $name) {

                assertArgs(2, $args, $name);

                return 'foreach (' . $args[0] . ' as $s) { if ($s instanceof Node\Scalar\EncapsedStringPart) {'

                     . ' $s->value = Node\Scalar\String_::parseEscapeSequences($s->value, null, ' . $args[1] . '); } }'

                     . ' $s->value = preg_replace(\'~(\r\n|\n|\r)\z~\', \'\', $s->value);'

                     . ' if (\'\' === $s->value) array_pop(' . $args[0] . ');';

            }

            return $matches[0];

        },