/**
* @param $code
* @return string
*/
public static function printCharCode($code)
{
if (null === $code) {
return '<EOF>';
}
return $code < 0x7f ? json_encode(Utils::chr($code)) : '"\\u' . dechex($code) . '"';
}
/**
* @it accepts BOM header
*/
public function testAcceptsBomHeader()
{
$bom = Utils::chr(0xfeff);
$expected = ['kind' => Token::NAME, 'start' => 2, 'end' => 5, 'value' => 'foo'];
$this->assertArraySubset($expected, (array) $this->lexOne($bom . ' foo'));
}
private function readString($start)
{
$body = $this->source->body;
$bodyLength = $this->source->length;
$position = $start + 1;
$chunkStart = $position;
$code = null;
$value = '';
while ($position < $bodyLength && ($code = Utils::charCodeAt($body, $position)) && $code !== 34 && $code !== 10 && $code !== 13 && $code !== 0x2028 && $code !== 0x2029) {
++$position;
if ($code === 92) {
// \
$value .= mb_substr($body, $chunkStart, $position - 1 - $chunkStart, 'UTF-8');
$code = Utils::charCodeAt($body, $position);
switch ($code) {
case 34:
$value .= '"';
break;
case 47:
$value .= '\\/';
break;
case 92:
$value .= '\\';
break;
case 98:
$value .= '\\b';
break;
case 102:
$value .= '\\f';
break;
case 110:
$value .= '\\n';
break;
case 114:
$value .= '\\r';
break;
case 116:
$value .= '\\t';
break;
case 117:
$hex = mb_substr($body, $position + 1, 4);
if (!preg_match('/[0-9a-fA-F]{4}/', $hex)) {
throw Exception::create($this->source, $position, 'Bad character escape sequence');
}
$value .= Utils::chr(hexdec($hex));
$position += 4;
break;
default:
throw Exception::create($this->source, $position, 'Bad character escape sequence');
}
++$position;
$chunkStart = $position;
}
}
if ($code !== 34) {
throw Exception::create($this->source, $position, 'Unterminated string');
}
$value .= mb_substr($body, $chunkStart, $position - $chunkStart, 'UTF-8');
return new Token(Token::STRING, $start, $position + 1, $value);
}
/**
* @param int $start
* @param int $line
* @param int $col
* @param Token $prev
* @return Token
* @throws SyntaxError
*/
private function readString($start, $line, $col, Token $prev)
{
$body = $this->source->body;
$bodyLength = $this->source->length;
$position = $start + 1;
$chunkStart = $position;
$code = null;
$value = '';
while ($position < $bodyLength && ($code = Utils::charCodeAt($body, $position)) && $code !== 0xa && $code !== 0xd && $code !== 34) {
$this->assertValidStringCharacterCode($code, $position);
++$position;
if ($code === 92) {
// \
$value .= mb_substr($body, $chunkStart, $position - 1 - $chunkStart, 'UTF-8');
$code = Utils::charCodeAt($body, $position);
switch ($code) {
case 34:
$value .= '"';
break;
case 47:
$value .= '/';
break;
case 92:
$value .= '\\';
break;
case 98:
$value .= chr(8);
break;
// \b (backspace)
// \b (backspace)
case 102:
$value .= "\f";
break;
case 110:
$value .= "\n";
break;
case 114:
$value .= "\r";
break;
case 116:
$value .= "\t";
break;
case 117:
$hex = mb_substr($body, $position + 1, 4, 'UTF-8');
if (!preg_match('/[0-9a-fA-F]{4}/', $hex)) {
throw new SyntaxError($this->source, $position, 'Invalid character escape sequence: \\u' . $hex);
}
$code = hexdec($hex);
$this->assertValidStringCharacterCode($code, $position - 1);
$value .= Utils::chr($code);
$position += 4;
break;
default:
throw new SyntaxError($this->source, $position, 'Invalid character escape sequence: \\' . Utils::chr($code));
}
++$position;
$chunkStart = $position;
}
}
if ($code !== 34) {
throw new SyntaxError($this->source, $position, 'Unterminated string');
}
$value .= mb_substr($body, $chunkStart, $position - $chunkStart, 'UTF-8');
return new Token(Token::STRING, $start, $position + 1, $line, $col, $prev, $value);
}
/**
* @it parses multi-byte characters
*/
public function testParsesMultiByteCharacters()
{
// Note: \u0A0A could be naively interpretted as two line-feed chars.
$char = Utils::chr(0xa0a);
$query = <<<HEREDOC
# This comment has a {$char} multi-byte character.
{ field(arg: "Has a {$char} multi-byte character.") }
HEREDOC;
$result = Parser::parse($query, ['noLocation' => true]);
$expected = new SelectionSetNode(['selections' => [new FieldNode(['name' => new NameNode(['value' => 'field']), 'arguments' => [new ArgumentNode(['name' => new NameNode(['value' => 'arg']), 'value' => new StringValueNode(['value' => "Has a {$char} multi-byte character."])])], 'directives' => []])]]);
$this->assertEquals($expected, $result->definitions[0]->selectionSet);
}
