Function getWildcardDirectoryFromSpec

test/fixtures/snapshot/typescript.js:42191–42215

(spec, useCaseSensitiveFileNames)

        return wildcardDirectories;
    }
    function getWildcardDirectoryFromSpec(spec, useCaseSensitiveFileNames) {
        var match = wildcardDirectoryPattern.exec(spec);
        if (match) {
            // We check this with a few `indexOf` calls because 3 `indexOf`/`lastIndexOf` calls is
            // less algorithmically complex (roughly O(3n) worst-case) than the regex we used to use,
            // \/[^/]*?[*?][^/]*\/ which was polynominal in v8, since arbitrary sequences of wildcard
            // characters could match any of the central patterns, resulting in bad backtracking.
            var questionWildcardIndex = spec.indexOf("?");
            var starWildcardIndex = spec.indexOf("*");
            var lastDirectorySeperatorIndex = spec.lastIndexOf(ts.directorySeparator);
            return {
                key: useCaseSensitiveFileNames ? match[0] : ts.toFileNameLowerCase(match[0]),
                flags: (questionWildcardIndex !== -1 && questionWildcardIndex < lastDirectorySeperatorIndex)
                    || (starWildcardIndex !== -1 && starWildcardIndex < lastDirectorySeperatorIndex)
                    ? 1 /* WatchDirectoryFlags.Recursive */ : 0 /* WatchDirectoryFlags.None */
            };
        }
        if (ts.isImplicitGlob(spec.substring(spec.lastIndexOf(ts.directorySeparator) + 1))) {
            return {
                key: ts.removeTrailingDirectorySeparator(useCaseSensitiveFileNames ? spec : ts.toFileNameLowerCase(spec)),
                flags: 1 /* WatchDirectoryFlags.Recursive */
            };
        }
        return undefined;
    }
    /**
     * Determines whether a literal or wildcard file has already been included that has a higher
     * extension priority.