LastIndexOf() [2/15]

unsafe int System.Globalization.CompareInfo.LastIndexOf ( ReadOnlySpan< char > source, ReadOnlySpan< char > value, CompareOptions options = CompareOptions::None )

inline

Definition at line 936 of file CompareInfo.cs.

    {
        if ((options & ~(CompareOptions.IgnoreCase | CompareOptions.IgnoreNonSpace | CompareOptions.IgnoreSymbols | CompareOptions.IgnoreKanaType | CompareOptions.IgnoreWidth)) == 0)
        {
            if (!GlobalizationMode.Invariant)
            {
                if (value.IsEmpty)
                {
                    return source.Length;
                }
                return IndexOfCore(source, value, options, null, fromBeginning: false);
            }
            if ((options & CompareOptions.IgnoreCase) == 0)
            {
                return source.LastIndexOf(value);
            }
            return Ordinal.LastIndexOfOrdinalIgnoreCase(source, value);
        }
        return options switch
        {
            CompareOptions.Ordinal => source.LastIndexOf(value), 
            CompareOptions.OrdinalIgnoreCase => Ordinal.LastIndexOfOrdinalIgnoreCase(source, value), 
            _ => throw new ArgumentException(SR.Argument_InvalidFlag, "options"), 
        };
    }

References System.SR.Argument_InvalidFlag, System.Runtime.Serialization.Dictionary, System.Globalization.CompareInfo.IndexOfCore(), System.Globalization.GlobalizationMode.Invariant, System.Globalization.Ordinal.LastIndexOfOrdinalIgnoreCase(), System.options, System.source, and System.value.