public Expr(ICFMangleContext ctx)
: base(ctx)
{
_invCompiled = new CilFragment();
_stateVar = new Local(ctx.Method.Module.CorLibTypes.Int32);
var body = ctx.Method.Body;
body.Variables.Add(_stateVar);
body.InitLocals = true;
var nm = new IntGenerator(ctx.Mangler.Rng, ctx.Mangler.Options.MaxMangleIterations);
var codec = nm.Generate();
codec.ParameterResolver = p => p == nm.Argument ? _stateVar : null;
_codec = codec;
var emitter = DnextFactory.NewILEmitter(ctx.Method.Module, ctx.Importer, _invCompiled);
codec.EmitDemangler(emitter);
}