Usually -2^2 is considered to be -4, because: the minus is interpreted as a
unary operator with lower precedence, than ^ (power)... E.g.:
http://www.isthe.com/chongo/tech/comp/calc/
_but_:
I would like to have a parser,
[1] that binds the sign of a number stronger than a ^ (power), and
[2] that
Hi,
At 2022-09-22T07:08:55CEST Akim Demaille wrote:
> This snippet is clearly ambiguous, since it allows two different parses of
> -1, which -Wcex nicely showed.
>
yes. right.
> If I were you, I would handle this in the scanner. IOW, the scanner should
> be extended to support signed literals
On 2022-09-22T07:57:45UTC Hans Åberg wrote:
> On 22 Sep 2022, at 08:30, Lukas Arsalan wrote:
>> [1] -1 --> "num"
>> [2] 1-2 --> "num" "-" "num"
>> [3] (-1^-2) --> "(" "num" "^" "num&
On 2022-09-22T15:54:31UTC Hans Åberg wrote:
> Context switches are best avoided unless absolutely necessary, in my
> experience.
> So if one designs ones own language, it might be good to try to avoid them
> by a change in the grammar.
>
OK... I know that there are no signed numbers usually...
