private function readToken(Token $prev)
{
$body = $this->source->body;
$bodyLength = $this->source->length;
$position = $this->positionAfterWhitespace($prev->end);
$line = $this->line;
$col = 1 + $position - $this->lineStart;
if ($position >= $bodyLength) {
return new Token(Token::EOF, $bodyLength, $bodyLength, $line, $col, $prev);
}
$code = Utils::charCodeAt($body, $position);
// SourceCharacter
if ($code < 0x20 && $code !== 0x9 && $code !== 0xa && $code !== 0xd) {
throw new SyntaxError($this->source, $position, 'Cannot contain the invalid character ' . Utils::printCharCode($code));
}
switch ($code) {
case 33:
// !
return new Token(Token::BANG, $position, $position + 1, $line, $col, $prev);
case 35:
// #
return $this->readComment($position, $line, $col, $prev);
case 36:
// $
return new Token(Token::DOLLAR, $position, $position + 1, $line, $col, $prev);
case 40:
// (
return new Token(Token::PAREN_L, $position, $position + 1, $line, $col, $prev);
case 41:
// )
return new Token(Token::PAREN_R, $position, $position + 1, $line, $col, $prev);
case 46:
// .
if (Utils::charCodeAt($body, $position + 1) === 46 && Utils::charCodeAt($body, $position + 2) === 46) {
return new Token(Token::SPREAD, $position, $position + 3, $line, $col, $prev);
}
break;
case 58:
// :
return new Token(Token::COLON, $position, $position + 1, $line, $col, $prev);
case 61:
// =
return new Token(Token::EQUALS, $position, $position + 1, $line, $col, $prev);
case 64:
// @
return new Token(Token::AT, $position, $position + 1, $line, $col, $prev);
case 91:
// [
return new Token(Token::BRACKET_L, $position, $position + 1, $line, $col, $prev);
case 93:
// ]
return new Token(Token::BRACKET_R, $position, $position + 1, $line, $col, $prev);
case 123:
// {
return new Token(Token::BRACE_L, $position, $position + 1, $line, $col, $prev);
case 124:
// |
return new Token(Token::PIPE, $position, $position + 1, $line, $col, $prev);
case 125:
// }
return new Token(Token::BRACE_R, $position, $position + 1, $line, $col, $prev);
// A-Z
// A-Z
case 65:
case 66:
case 67:
case 68:
case 69:
case 70:
case 71:
case 72:
case 73:
case 74:
case 75:
case 76:
case 77:
case 78:
case 79:
case 80:
case 81:
case 82:
case 83:
case 84:
case 85:
case 86:
case 87:
case 88:
case 89:
case 90:
// _
// _
case 95:
// a-z
// a-z
case 97:
case 98:
case 99:
case 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
case 108:
case 109:
case 110:
case 111:
case 112:
case 113:
case 114:
case 115:
case 116:
case 117:
case 118:
case 119:
case 120:
case 121:
case 122:
return $this->readName($position, $line, $col, $prev);
// -
// -
case 45:
// 0-9
// 0-9
case 48:
case 49:
case 50:
case 51:
case 52:
case 53:
case 54:
case 55:
case 56:
case 57:
return $this->readNumber($position, $code, $line, $col, $prev);
// "
// "
case 34:
return $this->readString($position, $line, $col, $prev);
}
$errMessage = $code === 39 ? "Unexpected single quote character ('), did you mean to use " . 'a double quote (")?' : 'Cannot parse the unexpected character ' . Utils::printCharCode($code) . '.';
throw new SyntaxError($this->source, $position, $errMessage);
}
