ABT.Env2.OutScope C# (CSharp) Метод

        public Env2 OutScope() {
            if (this._functionScope.IsNone) {
                throw new InvalidProgramException("Isn't in a function. Cannot pop scope.");
            }
            if (this._functionScope.Value.LocalScopes.IsEmpty) {
                throw new InvalidProgramException("No Local scope to pop.");
            }
            return new Env2(
                this._globalSymbolTable,
                Option.Some(new FunctionScope(
                    this._functionScope.Value.FunctionType,
                    this._functionScope.Value.FunctionParams,
                    this._functionScope.Value.LocalScopes.Pop()
                ))
            );
        }