Pytocs.Syntax.Parser.arith_expr C# (CSharp) Method

        public Exp arith_expr()
        {
            var e = term();
            if (e == null)
                return null;
            for (; ; )
            {
                Op op;
                switch (lexer.Peek().Type)
                {
                case TokenType.OP_PLUS: op = Op.Add; break;
                case TokenType.OP_MINUS: op = Op.Sub; break;
                default: return e;
                }
                lexer.Get();
                var r = term();
                if (r == null)
                    Unexpected();
                e = new BinExp(op, e, r, filename, e.Start, r.End);
            }
        }