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Subject: Re: EzGraph
From: Reto Bachmann-Gmuer <reto.bachmann@trialox.org>
To: Henry Story <henry.story@bblfish.net>
Cc: clerezza-dev@incubator.apache.org
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On Fri, Jul 1, 2011 at 5:48 PM, Henry Story <henry.story@bblfish.net> wrote=
:

> On 1 Jul 2011, at 17:24, reto@apache.org checked in
>
>
> URL: http://svn.apache.org/viewvc?rev=3D1141963&view=3Drev
> Log:
> CLEREZZA-510: using <-- instead of -<- for inverse properties
>
>
> Did you read the documentation for why I chose -<- ?
>
Yes I did read the comment. I just found the asymmetry uglier than requirin=
g
them to be used in the right orde (or repeat the subject, see test).


> The reason is that with <-- you change the priority of the operators and =
so
> things get more
> complicated for the developer to work with,
>
I don't think it gets much more complicated the only thing to remember is
that the inverse properties must follow forward properties and not the othe=
r
way round, there's a comment on this in test.

If you have a strong preference for the other variant I could roll back tha=
t
commit.

Reto


> as he has to remember carefully the following
>
> <blockquote>
>       The precedence of an infix operator is determined by the operator=
=E2=80=99s
> first character.
>       Characters are listed below in increasing order of precedence, with
> characters on
>       the same line having the same precedence.
>               (all letters)
>                |
>                ^
>               &
>               < >
>               =3D !
>               :
>              + -
>              * / %
>            (all other special characters)
>
>     That is, operators starting with a letter have lowest precedence,
> followed by operators
>     starting with =E2=80=98|=E2=80=99, etc.
>     There=E2=80=99s one exception to this rule, which concerns assignment
> operators(=C2=A76.12.4).
>     The precedence of an assigment operator is the same as the one of
> simple assignment
>     (=3D). That is, it is lower than the precedence of any other operator=
.
>     The associativity of an operator is determined by the operator=E2=80=
=99s last
> character. Operators
>     ending in a colon =E2=80=98:=E2=80=99 are right-associative. All othe=
r operators are
> leftassociative.
>  </blockquote>
>
>
>
> Henry
>
>

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