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#424 Interpreter code generation failed  ← ↑ →  #426 Non-builtin domain values fail

#425 confusion over Category
  
last edited 7 years ago by test1

Edit detail for #425 confusion over Category revision 10 of 13
1 2 3 4 5 6 7 8 9 10 11 12 13
Editor: Bill Page
Time: 2008/05/28 22:21:35 GMT-7
Note: formatting 
changed:
-OpenAxiom trunk as of 2008-05-29 says this:
-
-(1) -> Category has Category
-(1) ->
OpenAxiom trunk as of 2008-05-29 says this::

 (1) -> Category has Category
 (1) ->

changed:
-(2) -> Domain has Category
-(2) ->
 (2) -> Domain has Category
 (2) ->

changed:
-(3) -> Category has Type
-(3) ->
 (3) -> Category has Type
 (3) ->

Submitted by : Bill Page at: 2008-05-28T17:12:50-07:00 (16 years ago)
Name :
Axiom Version :
Category : Severity : Status :
Optional subject :  
Optional comment :

The file algebra/domain.spad.pamphlet contains this definition: 

  )abbrev domain CATEGORY Category
  ++ Author: Gabriel Dos Reis
  ++ Date Create: February 16, 2008.
  ++ Date Last Updated: February 16, 2008.
  ++ Basic Operations: coerce
  ...

but OpenAxiom? does not always treat Category this way: 

axiom
)show Category
 Category  is a domain constructor
 Abbreviation for Category is CATEGORY
 This constructor is not exposed in this frame.
 Issue )edit /usr/local/lib/open-axiom/x86_64-unknown-
linux/1.2.0-2008-05-25/src/algebra/CATEGORY.spad to see algebra source code for
CATEGORY
------------------------------- Operations --------------------------------
 coerce : % -> OutputForm

axiom
Category
LatexWiki Image(1)
Type: Type

axiom
x:Category
   Category is a category, not a domain, and declarations require
      domains.

axiom
Category has Category
LatexWiki Image(2)
Type: Boolean
axiom
Domain has Category
LatexWiki Image(3)
Type: Boolean
axiom
Category has Type
LatexWiki Image(4)
Type: Boolean

... --Bill Page, Wed, 28 May 2008 17:13:05 -0700 reply
Axiom Version: => /usr/local/lib/open-axiom/x86_64-unknown-linux/1.2.0-2008-05-25

category regression --gdr, Wed, 28 May 2008 17:55:47 -0700 reply
hat is a regression, because the rest of the compiler and interpreter assumes that Category is conceptually a category -- even when it has a domain implementation.

what? --Bill Page, Wed, 28 May 2008 18:39:35 -0700 reply
gdr wrote: 
  Category is conceptually a category -- even when it has a domain implementation

Could you please explain what that means? :-)

... --gdr, Wed, 28 May 2008 20:48:32 -0700 reply
At the conceptual level, OpenAixom? thinks of Category as a category. The category of categories. However, it has a domain implementation, e.g. as reported by )show. That is just an implementation detail.

domains belong to Category --gdr, Wed, 28 May 2008 22:06:22 -0700 reply
OpenAxiom? trunk as of 2008-05-29 says this: 
 (1) -> Category has Category
 (1) ->
   (1)  true
                                                                Type: Boolean
 (2) -> Domain has Category
 (2) ->
   (2)  true
                                                                Type: Boolean
 (3) -> Category has Type
 (3) ->
   <a href="#eq3">(3)</a>  true
                                                                Type: Boolean