AST.TypedefName.GetExprType C# (CSharp) Метод

        public override ISemantReturn<ExprType> GetExprType(Env env) {
            var entryOpt = env.Find(this.Name);
            if (entryOpt.IsNone) {
                throw new InvalidProgramException("This should not pass the parser.");
            }
            var entry = entryOpt.Value;
            if (entry.Kind != Env.EntryKind.TYPEDEF) {
                throw new InvalidProgramException("This should not pass the parser.");
            }
            return SemantReturn.Create(env, entry.Type);
        }