IsPrefix() [2/4]

unsafe bool System.Globalization.CompareInfo.IsPrefix ( ReadOnlySpan< char > source, ReadOnlySpan< char > prefix, CompareOptions options = CompareOptions::None )

inline

Definition at line 440 of file CompareInfo.cs.

    {
        if (prefix.IsEmpty)
        {
            return true;
        }
        if ((options & ~(CompareOptions.IgnoreCase | CompareOptions.IgnoreNonSpace | CompareOptions.IgnoreSymbols | CompareOptions.IgnoreKanaType | CompareOptions.IgnoreWidth)) == 0)
        {
            if (!GlobalizationMode.Invariant)
            {
                return StartsWithCore(source, prefix, options, null);
            }
            if ((options & CompareOptions.IgnoreCase) == 0)
            {
                return source.StartsWith(prefix);
            }
            return source.StartsWithOrdinalIgnoreCase(prefix);
        }
        switch (options)
        {
        case CompareOptions.Ordinal:
            return source.StartsWith(prefix);
        case CompareOptions.OrdinalIgnoreCase:
            return source.StartsWithOrdinalIgnoreCase(prefix);
        default:
            ThrowCompareOptionsCheckFailed(options);
            return false;
        }
    }

References System.Globalization.GlobalizationMode.Invariant, System.options, System.prefix, System.source, System.Globalization.CompareInfo.StartsWithCore(), and System.Globalization.CompareInfo.ThrowCompareOptionsCheckFailed().