Re: Tree structure

[jacobs@arthur.inria.fr (Ian Jacobs)]

In article <1994Jan19.073249.19777@sophia.inria.fr>, rlin@apple.fcit.monash.edu.au (Richard Lin Kuang-Hsu) writes:
|> Dear Sir,
|> 
|> 	Our Centaur has been runnung OK so far. But there are some
|> message wont show when we done something wrong. Therefore, I 
|> have to ask for help.
|> 
|> 	Question 1: Can I change the tree structure of my own language(Z),
|> or I have to follow the tree structure like Exp? 

We advise you to maintain the basic structure of the language
hierarchy, especially since Centaur1.3 will offer a command to create
the hierarchy interactively, in just a few seconds, with resources
created automatically. However, if you are using only metal or only
sdf, you might change L/syntax/metal -> L/syntax, for example.

|> I try to update the
|> directory structure with less levels. I do change all the .rdb files 
|> correspond to the new directory structure. Then I cannot read the 
|> test files(e.g, test.Z).

In any case, the language hierarchy structure has no effect on
Centaur. This is certainly a resource problem.Check for the following:

1) In the .centaur.rdb, write Centaur.Z*Root:user and
   remove all other Root resources from other files. 
2) Check for spelling errors.
3) Check that no resource split onto two lines has a blank space
   after the backslash (i.e., is must be backslash then newline only).



|> The following is the rdb files:
|> ------ .centaur.rdb ----
|> 
|> Centaur.UserFormalisms: (Z)
|> Centaur.Z.Database.UserDefaults: \
|> centaur/Z/Z.rdb
|> ----- Z.rdb ------------
|> 
|> Centaur.Z.Root:      user
|> Centaur.Z.Location:  centaur/Z/metal
|> Centaur.Z.Mode:      std
|> 
|> Centaur.METAL.Env: module
|> Centaur.METAL.env.Root: app
                           ^^^ bizarre

|> Centaur.METAL.env.Location: centaur/tables/metal/environment
                               centaur/Z/environment instead perhaps.

|> Centaur.METAL.env.Mode: interp
|> 
|> Centaur.Z.SyntaxManager.Syntax.Root:      user
|> Centaur.Z.SyntaxManager.Syntax.Location:  centaur/Z/metal
|> Centaur.Z.SyntaxManager.Syntax.Mode:      std

|> Centaur.Z.ppml.Database.UserDefaults: centaur/Z/pprinters.rdb

...
|> ----- pprinters.rdb -----
|> 
|> Centaur.Z.ppml.std.Database.UserDefaults: \
|> centaur/Z/std/std.rdb
...
|> Centaur.Z.ppml.std.Root:     user
|> Centaur.Z.ppml.std.Location: centaur/Z/std
|> Centaur.Z.ppml.std.Mode:     compiled

The other resources shouldn't have any influence on finding files.

|> 
|> Question 2:
|> 	Is Metal capabile of handling 'user defined data type (e.g., struct
|> in C)' 

Yes. You may write:

     implemented as MYCLASS;

in your Metal program as long as you have defined the vtp class
"myclass" and a creation function for this class. If you would
like an example of this (or a solution), please contact me for 
assistance in defining a new vtp class. Unfortunately, the new vtp
document, which explains this well, has not been distributed yet.
It arrives with centaur1.3 in a couple of weeks.

|> and 'user defined operator and relationship'?

I don't understand this.

Ian