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Re: Prefix and postfix

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  Re: Prefix and postfix Keith Thompson <kst-u@mib.org> - 2015-12-07 11:46 -0800
    Re: Prefix and postfix glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-12-08 01:07 +0000
    Re: Prefix and postfix Jan Burse <janburse@fastmail.fm> - 2015-12-15 22:13 +0100

#33313 — Re: Prefix and postfix

ram@zedat.fu-berlin.de (Stefan Ram) writes:
> glen herrmannsfeldt <gah@ugcs.caltech.edu> writes:
>>For comparison purposes, Java has assignment expressions as
>>statements.
>
>   In Java, assignment expressions are not statements.

No, but as in C, adding a semicolon to an assignment expression makes
it a statement, specifically an ExpressionStatement.  (Unlike C,
Java doesn't permit adding a semicolon to *any* expression to form
a statement, but an assignment is one of the subset of expressions
that can be used in an ExpressionStatement.)

If you're going to quibble about punctuation in a forum that may
not be familiar with the language you're discussing, it would be
helpful to mention what you're doing.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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#33314

In comp.lang.c Keith Thompson <kst-u@mib.org> wrote:
> ram@zedat.fu-berlin.de (Stefan Ram) writes:
>> glen herrmannsfeldt <gah@ugcs.caltech.edu> writes:
>>>For comparison purposes, Java has assignment expressions as
>>>statements.

>>   In Java, assignment expressions are not statements.
 
> No, but as in C, adding a semicolon to an assignment expression makes
> it a statement, specifically an ExpressionStatement.  (Unlike C,
> Java doesn't permit adding a semicolon to *any* expression to form
> a statement, but an assignment is one of the subset of expressions
> that can be used in an ExpressionStatement.)

Is that what he meant?  No, I didn't figure that out.

I thought it had something to do with the way it was defined
in Java. 

Yes I know that in some languages semicolons are statement terminators
and in others separators, in the former thay are part of the statement,
in the latter they aren't.  (See the differnnce in IF statements in
Pascal and PL/I.)
 
> If you're going to quibble about punctuation in a forum that may
> not be familiar with the language you're discussing, it would be
> helpful to mention what you're doing.

Or even if they are, and just miss the point.

-- glen

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#33351

Keith Thompson schrieb:
> ram@zedat.fu-berlin.de (Stefan Ram) writes:
>> glen herrmannsfeldt <gah@ugcs.caltech.edu> writes:
>>> For comparison purposes, Java has assignment expressions as
>>> statements.
>>
>>    In Java, assignment expressions are not statements.
>
> No, but as in C, adding a semicolon to an assignment expression makes
> it a statement, specifically an ExpressionStatement.  (Unlike C,
> Java doesn't permit adding a semicolon to *any* expression to form
> a statement, but an assignment is one of the subset of expressions
> that can be used in an ExpressionStatement.)
>
> If you're going to quibble about punctuation in a forum that may
> not be familiar with the language you're discussing, it would be
> helpful to mention what you're doing.
>

Yep, see here:
https://docs.oracle.com/javase/specs/jls/se8/html/jls-14.html#jls-ExpressionStatement

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