AST.IfStmt.GetStmt C# (CSharp) Метод

        public override Tuple<ABT.Env, ABT.Stmt> GetStmt(ABT.Env env) {
            ABT.Expr cond = this.Cond.GetExpr(env);

            if (!cond.Type.IsScalar) {
                throw new InvalidOperationException("Error: expected scalar Type");
            }

            Tuple<ABT.Env, ABT.Stmt> r_stmt = this.Stmt.GetStmt(env);
            env = r_stmt.Item1;
            ABT.Stmt stmt = r_stmt.Item2;

            return new Tuple<ABT.Env, ABT.Stmt>(env, new ABT.IfStmt(cond, stmt));
        }
    }