Re: @property usage
On 09/12/14 08:31, Nicholas Londey via Digitalmars-d-learn wrote: Does @property ever make sense for a free floating function? http://dlang.org/phobos/std_random.html#.rndGen :-)
Re: @property usage
On 12/9/2014 4:31 PM, Nicholas Londey wrote: Does @property ever make sense for a free floating function? I would have thought no but was recently asked to add it if using the function with uniform call syntax. I use it from time-to-time. I assume you think of properties as belonging to objects and not just something that is useful with UFCS. Keep in mind that free-floating functions belong to modules and modules (usually) belong to packages. These are units of encapsulation above classes structs. There could be (and has been in these forums) lengthy debate about what constitutes a property and what doesn't, but whether or not a function belongs to a class or struct shouldn't enter into it, IMO.
Re: @property usage
On Tuesday, 9 December 2014 at 07:31:21 UTC, Nicholas Londey wrote: as this can break some invalid code (the code where people using properties as functions) Does @property ever make sense for a free floating function? I would have thought no but was recently asked to add it if using the function with uniform call syntax. https://github.com/D-Programming-Language/dub/pull/455#discussion_r21430311 After a quick grep I see phobos uses quite a few free floating @property...
Re: @property usage
as this can break some invalid code (the code where people using properties as functions) Does @property ever make sense for a free floating function? I would have thought no but was recently asked to add it if using the function with uniform call syntax. https://github.com/D-Programming-Language/dub/pull/455#discussion_r21430311
Re: @property usage
On Tue, 09 Dec 2014 07:31:20 +
Nicholas Londey via Digitalmars-d-learn
digitalmars-d-learn@puremagic.com wrote:
as this can break some invalid code (the code where people using
properties as functions)
Does @property ever make sense for a free floating function? I
would have thought no but was recently asked to add it if using
the function with uniform call syntax.
https://github.com/D-Programming-Language/dub/pull/455#discussion_r21430311
when you want to make a function that acts as getter/setter for
delegate callback, for example.
private void delegate () cb;
@property auto myCB () { return cb; }
@property void myCB (void delegate () newcb) {
/* some checks */
cb = newcb;
}
this will work as expected when property enforcement will be fixed --
i.e. you will be able to omit '()' for calling delegate.
alas, this is another thing that is cosmetic, so PR with property
enforcement will rot on github forever.
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Re: @property usage
On Thursday, December 04, 2014 10:21:10 uri via Digitalmars-d-learn wrote: Hi All, Do you guys use @property much, or is it largely ignored/avoided? @property is used rather freuently - e.g. some of the functions in the range API are required to be properties. Typically, @property is used when you'd use a getter or setter in another language (or when you need to emulate a variable). Using get* or set* would generally not be considered idiomatic D and is not typically done. @property functions are used instead. Now, because the parens are optional on functions with no arguments, there are plenty of cases where functions are called without parens when they're not properties, but property functions are quite common. - Jonathan M Davis
Re: @property usage
On Sat, 06 Dec 2014 15:23:10 -0800 Jonathan M Davis via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: On Thursday, December 04, 2014 10:21:10 uri via Digitalmars-d-learn wrote: Hi All, Do you guys use @property much, or is it largely ignored/avoided? @property is used rather freuently - e.g. some of the functions in the range API are required to be properties. Typically, @property is used when you'd use a getter or setter in another language (or when you need to emulate a variable). Using get* or set* would generally not be considered idiomatic D and is not typically done. @property functions are used instead. Now, because the parens are optional on functions with no arguments, there are plenty of cases where functions are called without parens when they're not properties, but property functions are quite common. we all waiting for property enforcement fixes (which i already integrated, heh), so delegate properties can be used as propeties, omiting the annoying '()'. as this can break some invalid code (the code where people using properties as functions) i assume that we'll live with half-backed properties forever. signature.asc Description: PGP signature
Re: @property usage
On 4/12/2014 11:21 p.m., uri wrote: Hi All, Do you guys use @property much, or is it largely ignored/avoided? Thanks, uri When it makes sense I use it. https://github.com/Devisualization/window/blob/master/interfaces/devisualization/window/interfaces/window.d#L144 vs https://github.com/rikkimax/Dobol/blob/master/source/dobol/parser/dobol/parser/defs.d
Re: @property usage
On Thursday, 4 December 2014 at 10:24:00 UTC, Rikki Cattermole wrote: On 4/12/2014 11:21 p.m., uri wrote: Hi All, Do you guys use @property much, or is it largely ignored/avoided? Thanks, uri When it makes sense I use it. https://github.com/Devisualization/window/blob/master/interfaces/devisualization/window/interfaces/window.d#L144 vs https://github.com/rikkimax/Dobol/blob/master/source/dobol/parser/dobol/parser/defs.d Thanks for the examples. As always I found what I needed just after posting: http://wiki.dlang.org/Property_Discussion_Wrap-up /uri
Re: @property usage
On Thu, 04 Dec 2014 10:21:10 + uri via Digitalmars-d-learn digitalmars-d-learn@puremagic.com wrote: Do you guys use @property much, or is it largely ignored/avoided? i'm using it alot for the things that looks like properties. ;-) the thing is looking like a property if it works almost as fast as accesing the field directly. i.e. does simple check or two, but doesn't calculate something heavy. that means that `area` for Rect is definitely a property, but `equalElementCount` for a single-linked list is not. i also using that alot to simulate read-only fields. signature.asc Description: PGP signature
