Function isOrKeyword

packages/queryLanguage/src/tokens.ts:65–98

* Checks if current position starts with "or" that will be recognized as the OR operator. * This matches the logic in orToken - only returns true if "or" is NOT at start, * is followed by non-alphanumeric, AND there's actual content after it (not EOF).

(input: InputStream)

 * is followed by non-alphanumeric, AND there's actual content after it (not EOF).
 */
function isOrKeyword(input: InputStream): boolean {
    if (input.peek(0) !== 111 /* 'o' */ || input.peek(1) !== 114 /* 'r' */) {
        return false;
    }

    // Don't match "or" at the start of input
    if (input.pos === 0) {
        return false;
    }

    const afterOr = input.peek(2);

    // Must not be alphanumeric (to avoid matching "orange")
    if (isAlphaNumUnderscore(afterOr)) {
        return false;
    }

    // Must not be EOF (at EOF, "or" should be a word, not a keyword)
    if (afterOr === EOF) {
        return false;
    }

    // Check that what follows (after whitespace) is not EOF
    let offset = 2;
    while (isWhitespace(input.peek(offset))) {
        offset++;
    }
    if (input.peek(offset) === EOF) {
        return false;
    }

    // It's a valid OR keyword
    return true;
}

/**
 * Checks if current position starts with a prefix keyword.