{"id":1224,"date":"2012-09-13T10:16:47","date_gmt":"2012-09-12T22:16:47","guid":{"rendered":"https:\/\/www.deltics.co.nz\/blog\/?p=1224"},"modified":"2012-09-13T10:16:47","modified_gmt":"2012-09-12T22:16:47","slug":"sugary-goodness-in-nougat","status":"publish","type":"post","link":"https:\/\/www.deltics.co.nz\/blog\/posts\/1224\/","title":{"rendered":"Sugary Goodness in “Nougat”"},"content":{"rendered":"[Estimated Reading Time: <\/span> 2<\/span> minutes]<\/span><\/span>

Continuing the theme of recent – and upcoming – posts about new (and not so new) syntax in modern (and not so modern) variations on the Pascal language, I just have to comment on what I regard as yet another stunningly good job that the guys at RemObjects have done in their “Nougat” flavoured Oxygene.  Specifically in relation to how they have implemented the named method parts syntax in Objective-C.<\/p>\n

<\/p>\n

The example that Marc Hoffman provides in his recent blog post<\/a>, is the constructor method for a string, <a href="https:\/\/developer.apple.com\/library\/mac\/#documentation\/Cocoa\/Reference\/Foundation\/Classes\/NSString_Class\/Reference\/NSString.html" target="_blank">stringByPaddingToLength:withString:startingAtIndex:<\/a><\/code>.<\/p>\n

This would be called in Objective-C thusly:
\n
\n[myString stringByPaddingToLength: 9 withString: @"." startingAtIndex:0];
\n<\/code><\/p>\n

How on earth can you contrive to make such a call in a Pascal derived language ?<\/p>\n

Well, as Marc describes, there are a number of possible approaches, most of which are dictated by whether you are extending the language or merely providing a bridge from the language into the runtime.<\/p>\n

The bridge approach results in the most cumbersome – and imho downright ugly – solutions but remains strictly and technically within the limits of the existing Pascal language.<\/p>\n

A first cut at providing a bridge to this Objective-C API might simply ignore named method parts by implementing them as simple parameters to the base method name, overloading where necessary:<\/p>\n

\r\n  myString.stringByPaddingToLength(9, '.', 0);\r\n<\/pre>\n
Or you might encode the method part names in the method itself either by preference or by necessity (if there are methods whose method parts differ in name, but not type – though I am not as yet away of any such examples in the Objective-C runtime):<\/p>\n
\r\n  myString.stringByPaddingToLengthWithStringStartingAtIndex(9, '.', 0);\r\n<\/pre>\n
Not Your Daddy’s Pascal<\/h3>\n
Whilst both of these are demonstrably “Pascal”, within the existing syntax of the language, neither maps very comfortably or intuitively to the Objective-C runtime.<\/p>\n
Extending the language, by contrast, creates something that is arguably not Pascal at all – by definition, since it involves changes or additions to the syntax – but which is, ironically, the most Pascal-like in terms of preserving elegance and clarity not only in the language but in way that it exposes the underlying RTL:<\/p>\n
\r\n\/\/ [myString stringByPaddingToLength: 9 withString: @"." startingAtIndex:0];\r\n   myString.stringByPaddingToLength(9) withString('.') startingAtIndex(0);\r\n<\/pre>\n
imho, not only is this cleaner code and closer to the underlying RTL, but it is, if anything, an improvement even on the “native platform” code for that RTL!<\/p>\n
Whilst some might rail at this, crying “But this isn’t Pascal!!<\/strong>“, I would ask whether this would be considered more or less “Pascal-ish” than:<\/p>\n
\r\n  TMyWindowClass = class(TMyBaseControl)\r\n    procedure WMPaint(var aMessage: TWMPaint); message WM_PAINT;\r\n  end;\r\n<\/pre>\n
Colour Me Excited<\/h3>\n
For myself, I am increasingly excited to see how RemObjects approach targeting new platforms with the language that I am most familiar with, in the same way that I was excited when I first saw Delphi 1.0 and how the language was adapted to suit Windows, back in the day.<\/p>\n","protected":false},"excerpt":{"rendered":"
[Estimated Reading Time: <\/span> 2<\/span> minutes]<\/span><\/span> Continuing the theme of recent – and upcoming – posts about new (and not so new) syntax in modern (and not so modern) variations on the Pascal language, I just have to comment on what I regard as yet another stunningly good job that the guys at RemObjects have done in their “Nougat” flavoured Oxygene. […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":[]},"categories":[4,180],"tags":[13,151,173],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1TKYv-jK","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":1199,"url":"https:\/\/www.deltics.co.nz\/blog\/posts\/1199\/","url_meta":{"origin":1224,"position":0},"title":"Oxygene “Nougat” is Mac and iOS !","date":"06 Sep 2012","format":false,"excerpt":"Marc Hoffman has confirmed that \"Nougat\" is to Mac\/iOS as \"Cooper\" was to Java. \u00a0Some have speculated that this will be based on Mono, but Oxygene has had Mono covered for some time already, so I strongly doubt that this is the case. Far more likely is that just as\u2026","rel":"","context":"In "Delphi"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1593,"url":"https:\/\/www.deltics.co.nz\/blog\/posts\/1593\/","url_meta":{"origin":1224,"position":1},"title":"Learning Valuable Lessons","date":"14 Sep 2013","format":false,"excerpt":"Iztok has been at it again, making comments that prompt another post. :) He expresses his view that there are only two viable options for mobile development. The first is essentially the web-based technology approach (HTML\/JS\/PhoneGap etc) and the other is the platform native tool chains, Eclipse\/AndroidStudio\/Xcode etc. He may\u2026","rel":"","context":"In "Android"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1477,"url":"https:\/\/www.deltics.co.nz\/blog\/posts\/1477\/","url_meta":{"origin":1224,"position":2},"title":"A Case of Insensitivity","date":"15 Aug 2013","format":false,"excerpt":"I closed my previous post with an observation that the code for initialising an iOS user interface programmatically, as translated from equivalent Objective-C, contained a potential gotcha. I now have a little more time to expand on that. 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It is long, convoluted and ugly stuff (nb. that isn't a criticism of\u2026","rel":"","context":"In "Android"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2416,"url":"https:\/\/www.deltics.co.nz\/blog\/posts\/2416\/","url_meta":{"origin":1224,"position":4},"title":"Relight My Fire","date":"01 May 2016","format":false,"excerpt":"I'm not sure how many more song inspired Fire references I can keep coming up with, but here at least is one more. In response to my previous post Wouter commented that he had a much simpler cross platform solution to the random number problem: Which is very pithy but\u2026","rel":"","context":"In "Cooper"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1882,"url":"https:\/\/www.deltics.co.nz\/blog\/posts\/1882\/","url_meta":{"origin":1224,"position":5},"title":"Not Your Grand-Daddy’s Pascal (or Java)","date":"15 Oct 2013","format":false,"excerpt":"I've mentioned some of the cool stuff in the Oxygene language in various posts and thought it would be a good idea to list them again, along with some others that I've not previously mentioned. Oxygene Everywhere First some of the core language features that are available on all supported\u2026","rel":"","context":"In "Android"","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/posts\/1224"}],"collection":[{"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/comments?post=1224"}],"version-history":[{"count":3,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/posts\/1224\/revisions"}],"predecessor-version":[{"id":1227,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/posts\/1224\/revisions\/1227"}],"wp:attachment":[{"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/media?parent=1224"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/categories?post=1224"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deltics.co.nz\/blog\/wp-json\/wp\/v2\/tags?post=1224"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}