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

#425 confusion over Category
  
last edited 9 years ago by test1

Edit detail for #425 confusion over Category revision 9 of 13
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Editor: gdr
Time: 2008/05/28 22:06:22 GMT-7
Note: domains belong to Category 
added:

From gdr Wed May 28 22:06:22 -0700 2008
From: gdr
Date: Wed, 28 May 2008 22:06:22 -0700
Subject: domains belong to Category
Message-ID: <20080528220622-0700@axiom-wiki.newsynthesis.org>

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) ->
   (3)  true
                                                                Type: Boolean

Submitted by : Bill Page at: 2008-05-28T17:12:50-07:00 (18 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:

fricas
(1) -> )show Category

   The )show system command is used to display information about types 
      or partial types. For example, )show Integer will show 
      information about Integer .

      Category is not the name of a known type constructor. If you want
      to see information about any operations named Category , issue
                        )display operations Category

fricas
Category
\label{eq1}\hbox{\axiomType{Category}\ }(1)
Type: Variable(Category)

fricas
x:Category

   There are no library operations named Category 
      Use HyperDoc Browse or issue
                              )what op Category
      to learn if there is any operation containing " Category " in its
      name.

   Cannot find a no-argument definition or library operation named 
      Category .

fricas
Category has Category

   There are no library operations named Category 
      Use HyperDoc Browse or issue
                              )what op Category
      to learn if there is any operation containing " Category " in its
      name.

   Cannot find a no-argument definition or library operation named 
      Category .

... --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) -> (3) true Type: Boolean