patching an object

[1/7] from: dhsunanda::gmail::com at: 5-Jul-2007 8:44

Is there an *elegant* way of doing this? I have an object that makes up an API: my-api: make object! [ a: 1 b: 2 f1: func [] [print a + b] ] my-api/f1 == 3 ;; as you'd expect But I also have a set of patches that I want to apply to the API to override various words: patches: make object! [ b: 12 f1: func [] [print a - b] ] But if I apply the patches...... my-api: construct/with third patches my-api .......it does not bind the words as I'd hope: my-api/f1 ** Script Error: a has no value ** Where: f1 ** Near: print a - b *** One quick fix (given that this currently happens at application start-up, so I do not need to worry about any persistent values) is to mold and load: my-api: first reduce load/all mold my-api my-api/f1 == -11 ;; the correctly patched result But I am looking for something a little more elegant and/or REBOLish. Any ideas? Thanks, Sunanda.

[2/7] from: btiffin:rogers at: 6-Jul-2007 12:40

Sunanda; I'm probably 'not getting it', but my-api: make my-api [b: 12 f1: [a - b]] Cheers, Brian On Thursday 05 July 2007 03:44, Sunanda wrote:

[3/7] from: dhsunanda:gma:il at: 9-Jul-2007 17:46

Brian:

> Sunanda; I'm probably 'not getting it', but > > my-api: make my-api [b: 12 f1: [a - b]]

Thanks for the reply. The differences in your code are: 1. I was using two objects 2. f1 was a function in both cases If I put those characteristics back, and then try your make trick (rather than my original construct/with approach), I get.... my-api: make object! [ a: 1 b: 2 f1: func [] [print a + b] ] patch: make object! [b: 12 f1: func [][print a - b]] my-api: make my-api third patch ** Script Error: a has no value ** Near: print a - b .... which is the original issue, restated. *** This will work with your approach: my-api: make my-api load mold third patch But it hardly seems elegant to my mind. Any other approaches out there? Thanks, Sunanda

[4/7] from: santilli:gabriele:gmai:l at: 9-Jul-2007 19:33

2007/7/9, Sunanda <dhsunanda-gmail.com>:

> patch: make object! [b: 12 f1: func [][print a - b]]

Does patch have to be an object? If it's a block, make my-api patch should work. Regards, Gabriele.

[5/7] from: chris-ross:gill at: 10-Jul-2007 10:36

Hi Sunanda, I think this depends on the Core version, but: my-api: make my-api patches - Chris On Jul 5, 2007, at 2:44 AM, Sunanda wrote:

[6/7] from: pwawood:gm:ail at: 10-Jul-2007 19:24

Sunanda I tried this :

>> my-api: make object! [

[ a: 1 [ b: 2 [ f1: func [] [print a + b] [ ]

>> patch: make object! [

[ b: 12 [ f1: func [] [print a - b] [ ]

>> my-api: make my-api patch >> source my-api

my-api: make object! [ a: 1 b: 12 f1: func [][print a - b] ] Seems to do what you want. Cheers Peter On Tuesday, July 10, 2007, at 12:46 am, Sunanda wrote:

[7/7] from: dhsunanda:gmai:l at: 7-Jul-2007 12:09

Brian:

> Sunanda; I'm probably 'not getting it', but > > my-api: make my-api [b: 12 f1: [a - b]]

Thanks for the reply. The differences in your code are: If I put those characteristics back, and then try your make trick (rather than my original construct/with approach), I get.... my-api: make object! [ a: 1 b: 2 f1: func [] [print a + b] ] patch: make object! [b: 12 f1: func [][print a - b]] my-api: make my-api third patch ** Script Error: a has no value ** Near: print a - b .... which is the original issue, restated. This will work with your approach: my-api: make my-api load mold third patch But it hardly seems elegant to my mind. Any other approaches out there? Thanks, Sunanda