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Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax
From: |
Paolo Bonzini |
Subject: |
Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax |
Date: |
Sat, 10 Mar 2007 17:31:08 +0100 |
User-agent: |
Thunderbird 1.5.0.10 (Macintosh/20070221) |
> Although I don't object to the syntax quite as much as you do, I do
> think that some of the examples seem to violate the normal selector
> precedence, and that is a Bad Thing. In particular this:
>
> ChessPiece class >> test: side [ ... ]
Note that this is no valid syntax in Smalltalk. I see this "as if"
the "test:" keyword where an object is expected introduces a
"message pattern" which as the same precedence as an object (i.e.
very high).
> and this:
>
> Class name: RandomInteger class [ ... ]
Likewise, here the '[' where a keyword is expected introduce
a "scoped definition" which has instead a very low precedence.
It's like in standard math syntax, where "-/+" has high precedence if
it is unary, and low precedence if it is binary.
>> Then there are also a few minor other things that most people would not
>> find to be a problem at all:
>>
>> * "Object subclass: #SomeClass" is shorter and more to the point than
>> "Class name: SomeClass extends: Object".
>
> I agree. My opinion is that the first advertises the fact that
> Everything Is An Object. Still, I can live with it.
I would prefer "Object subclass: SomeClass" (okay, I know why you would
like the hash). If it is preferred, Daniele will implement it instead
of "Class name: SomeClass extends: Object".
The nice thing of "Class name: SomeClass extends: Object" is that it
pairs nicely with the syntax to define class extensions, which is
Class name: SomeClass [
...
]
Please comment on this.
>> <category> is followed by a
>> "comment", some
>> | temporary variables |, and an
>> ^answer.
>
> I would hope that the syntax is still free-form, and all four of those
> are optional, are they not?
Of course.
Paolo
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, (continued)
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Stefan Schmiedl, 2007/03/09
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Sungjin Chun, 2007/03/09
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, parasti, 2007/03/09
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, parasti, 2007/03/10
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Mike Anderson, 2007/03/11
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, parasti, 2007/03/11
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Paolo Bonzini, 2007/03/12
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, parasti, 2007/03/12
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Paolo Bonzini, 2007/03/13
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Stewart Stremler, 2007/03/13
- Re: [Help-smalltalk] [RFC] Smalltalk scripting syntax, Paolo Bonzini, 2007/03/13