using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System.Text.RegularExpressions;

BenchmarkRunner.Run<Benchmark>();

[MemoryDiagnoser]
public class Benchmark
{
    [Params("Property1", "Parent.Property2")]
    public string MemberName { get; set; }

    [Benchmark(Baseline = true)]
    public bool RegexInstance() => new Regex(@"[\.\[\]]").IsMatch(MemberName);

    [Benchmark]
    public bool RegexStatic() => Regex.IsMatch(MemberName, @"[\.\[\]]");

    private static readonly Regex regex = new Regex(@"[\.\[\]]");

    [Benchmark]
    public bool RegexCache() => regex.IsMatch(MemberName);

    [Benchmark]
    public bool RegexSource() => A.Contains().IsMatch(MemberName);

    [Benchmark]
    public bool LinqAndPattern() => MemberName.Any(e => e is '.' or '[' or ']');

    [Benchmark]
    public bool IndexOfAny() => MemberName.IndexOfAny(['.', '[', ']']) >= 0;

    private static readonly char[] chars = ['.', '[', ']'];

    [Benchmark]
    public bool IndexOfAnyCached() => MemberName.IndexOfAny(chars) >= 0;

    [Benchmark]
    public bool Contains() => MemberName.Contains('.') || MemberName.Contains('[') || MemberName.Contains(']');

    [Benchmark]
    public bool ContainsOrdinal() =>
        MemberName.Contains('.', StringComparison.Ordinal) || MemberName.Contains('[', StringComparison.Ordinal) || MemberName.Contains(']', StringComparison.Ordinal);
}

static partial class A
{
    [GeneratedRegex(@"[\.\[\]]")]
    public static partial Regex Contains();
}