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<?php /** * Section 4.3.5. of the CSS syntax 3 specification * * Consumes a string token as defined per section 4.3.5 of the CSS specification * @see https://www.w3.org/TR/css-syntax-3/#consume-string-token * * @param string|null $endingCodePoint * @return TString|BadString */ function consumeString(?string $endingCodePoint = null): Token { $endingCodePoint ??= $this->inputStream->next(); $string = ""; again: $codePoint = $this->inputStream->peek(); if ($codePoint === $endingCodePoint) { // Consume ending code point $this->inputStream->next(); return new TString($string); } if ($this->inputStream->isEndOfStream()) { // TODO Parse error return new TString($string); } if ($codePoint === Definitions::NEWLINE) { // TODO Parse error return new BadString($string); } if ($codePoint !== self::REVERSE_SOLIDUS) { $string .= $this->inputStream->next(); goto again; } switch ($this->inputStream->peek(1)) { case Definitions::NEWLINE: // Consume the NEW LINE $this->inputStream->next(); case '': // Consume the REVERSE SOLIDUS $this->inputStream->next(); goto again; default: $string .= $this->consumeEscapedCodePoint(); goto again; } }