GetFirstChars() private method

private GetFirstChars ( CultureInfo culture ) : String
culture System.Globalization.CultureInfo
return String
RegexFC Class Documentation
示例#1
0
        /*
         * This is the one of the only two functions that should be called from outside.
         * It takes a RegexTree and computes the set of chars that can start it.
         */
        internal static RegexPrefix FirstChars(RegexTree t)
        {
            RegexFCD s  = new RegexFCD();
            RegexFC  fc = s.RegexFCFromRegexTree(t);

            if (fc == null || fc._nullable)
            {
                return(null);
            }

            CultureInfo culture = ((t._options & RegexOptions.CultureInvariant) != 0) ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture;

            return(new RegexPrefix(fc.GetFirstChars(culture), fc.IsCaseInsensitive()));
        }
示例#2
0
        /// <summary>
        /// This is the one of the only two functions that should be called from outside.
        /// It takes a RegexTree and computes the set of chars that can start it.
        /// </summary>
        public static RegexPrefix?FirstChars(RegexTree t)
        {
            // Create/rent buffers
            Span <int> intSpan = stackalloc int[StackBufferSize];

            RegexFCD s  = new RegexFCD(intSpan);
            RegexFC  fc = s.RegexFCFromRegexTree(t);

            s.Dispose();

            if (fc == null || fc._nullable)
            {
                return(null);
            }

            CultureInfo culture = ((t.Options & RegexOptions.CultureInvariant) != 0) ? CultureInfo.InvariantCulture : CultureInfo.CurrentCulture;

            return(new RegexPrefix(fc.GetFirstChars(culture), fc.CaseInsensitive));
        }