On Thu, Jul 16, 2015 at 2:21 PM, Michael Van Canneyt <mich...@freepascal.org > wrote:
> On Thu, 16 Jul 2015, Marcos Douglas wrote: > >> On Thu, Jul 16, 2015 at 11:44 AM, Michael Van Canneyt >> <mich...@freepascal.org> wrote: >> >>> >>> >>> On Thu, 16 Jul 2015, Maciej Izak wrote: >>> >>> sadly - no, only in Delphi mode. btw. this thing keep me away from >>>> objfpc. >>>> >>> >>> >>> That seems like a very strange reason to me. >>> >>> The fact that you must type 1 word in certain places keeps you from >>> using an >>> otherwise useful mode ? >>> This word is there for clarity, It is meant to help you, to make explicit >>> you are in fact specializing a new type. >>> >> >> Yes, but do you think this is more verbose unnecessarily? Because the >> syntax TFoo<T> (I mean this "<>") show us that is a generic, don't? >> >> The Lazarus also has some troubles with the code completion using this: >> TFoo = class(TInterfacedObject, specialize ICloneable<TFoo>) >> > > Lazarus is not alone, even I have trouble with this :) > > >> Sometimes the IDE shows an error in interface declaration, but compiles. >> So, to not receive these errors I have to create a new type: >> >> TFoo = class; //forward >> >> IFooCloneable = specialize ICloneable<TFoo>; >> >> TFoo = class(TInterfacedObject, IFooCloneable) >> //... >> end; >> ...making even more verbose. >> > > Pascal is a verbose language. If you want terse, use C++ or something like > it. > > The whole generics mess that Delphi made goes completely against the > Pascal dictum that you must declare something before you can use it. > > To me, the above verbose construction makes absolute sense. It has been so > since day 1: > > PRecord = ^TRecord; > TRecord = record > a : integer; > next : PRecord; > end; > > Michael. IMHO this could be decided via poll, because several users around the world are using FPC too. For example, in a polling, I would vote in less keywords, e.g: [+1 vote for: "TFoo = class(TInterfacedObject, ICloneable<TFoo>)" / "t.Add<LongInt>(2, 4);"] and [-1 vote for: "TFoo = class(TInterfacedObject, specialize ICloneable<TFoo>)" / "t.specialize Add<LongInt>(2, 4);"]. The more verbose a language becomes, and needs more keywords to do simple things, the more chances it has to be depreciated. I use other languages too, like Java (Android) and JS (front-end / AngularJS), but here in our company we are testing and thinking about migrating a lot of our online structure to Node.js, because it is very productive and less burocratic. For while we are using a mix of Pascal (XE8/FPC 3) and Node.js via proxy + websocket, but the trend is to use only JS in front-end and back-end. -- Silvio Clécio My public projects - github.com/silvioprog
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