Automattic\WooCommerce\Vendor\GraphQL\Language

Lexer::readBlockString │ private │ WC 1.0

Reads a block string token from the source file.

"""("?"?(\"""|\(?!=""")|[^"\]))*"""

Method of the class: Lexer{}

No Hooks.

Returns

null. Nothing (null).

Usage

// private - for code of main (parent) class only
$result = $this->readBlockString( $line, $col, $prev ): Token;

$line(int) (required)

.

$col(int) (required)

.

$prev(Token) (required)

.

Lexer::readBlockString() Lexer::readBlockString code ^{WC 10.9.1}

private function readBlockString(int $line, int $col, Token $prev): Token
{
    $start = $this->position;

    // Skip leading quotes and read first string char:
    [$char, $code, $bytes] = $this->moveStringCursor(3, 3)->readChar();

    $chunk = '';
    $value = '';

    while ($code !== null) {
        // Closing Triple-Quote (""")
        if ($code === 34) {
            // Move 2 quotes
            [, $nextCode] = $this->moveStringCursor(1, 1)->readChar();
            [, $nextNextCode] = $this->moveStringCursor(1, 1)->readChar();

            if ($nextCode === 34 && $nextNextCode === 34) {
                $value .= $chunk;

                $this->moveStringCursor(1, 1);

                return new Token(
                    Token::BLOCK_STRING,
                    $start,
                    $this->position,
                    $line,
                    $col,
                    $prev,
                    BlockString::dedentBlockStringLines($value)
                );
            }

            // move cursor back to before the first quote
            $this->moveStringCursor(-2, -2);
        }

        $this->assertValidBlockStringCharacterCode($code, $this->position);
        $this->moveStringCursor(1, $bytes);

        [, $nextCode] = $this->readChar();
        [, $nextNextCode] = $this->moveStringCursor(1, 1)->readChar();
        [, $nextNextNextCode] = $this->moveStringCursor(1, 1)->readChar();

        // Escape Triple-Quote (\""")
        if (
            $code === 92
            && $nextCode === 34
            && $nextNextCode === 34
            && $nextNextNextCode === 34
        ) {
            $this->moveStringCursor(1, 1);
            $value .= $chunk . '"""';
            $chunk = '';
        } else {
            // move cursor back to before the first quote
            $this->moveStringCursor(-2, -2);

            if ($code === 10) { // new line
                ++$this->line;
                $this->lineStart = $this->position;
            }

            $chunk .= $char;
        }

        [$char, $code, $bytes] = $this->readChar();
    }

    throw new SyntaxError($this->source, $this->position, 'Unterminated string.');
}