CompiledRegexRunnerFactory.cs

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using System.Reflection.Emit;
 
namespace System.Text.RegularExpressions;
 
internal sealed class CompiledRegexRunnerFactory : RegexRunnerFactory
{
    private readonly DynamicMethod _goMethod;
 
    private readonly DynamicMethod _findFirstCharMethod;
 
    private readonly int _trackcount;
 
    private Action<RegexRunner> _go;
 
    private Func<RegexRunner, bool> _findFirstChar;
 
    public CompiledRegexRunnerFactory(DynamicMethod goMethod, DynamicMethod findFirstCharMethod, int trackcount)
    {
        _goMethod = goMethod;
        _findFirstCharMethod = findFirstCharMethod;
        _trackcount = trackcount;
    }
 
    protected internal override RegexRunner CreateInstance()
    {
        return new CompiledRegexRunner(_go ?? (_go = _goMethod.CreateDelegate<Action<RegexRunner>>()), _findFirstChar ?? (_findFirstChar = _findFirstCharMethod.CreateDelegate<Func<RegexRunner, bool>>()), _trackcount);
    }
}