Re: %use-macros

On 02/19/2015 04:24 PM, Martin Stein wrote:
> Hi,
>
> In order to simplify integration of the preprocessor (wisent works
> differently than bovine, so I could not simply copy from the only
> example given in C/C++) I wanted to define my own grammar macros with
> %use-macros, which almost works, except for a few problems I could not
> resolve. I have created a semantic/wisent/f90-grammar-macros.el file,
> which contains
>
> (defun semantic-f90-expand0-auxiliary (...)
>     "Auxiliary function."
> ...)
>
> (defun semantic-f90-grammar-macros-EXPAND0 (...)
>     "Fortran 90 EXPAND macro with depth=0 and spp support."
> ...)
>
> (provide 'semantic/wisent/f90-grammar-macros)
>
> According to documentation which confirms with the code I would need to
> put the following into my f90.wy grammar file:
>
> %use-macros semantic-f90-grammar-macros {EXPAND0}
>
> However, the function inserting the macro into actions contains (see
> semantic/grammar.el, line 434ff in function semantic-grammar-use-macros)
>
> (require lib)
>
> where lib = semantic-f90-grammar-macros, which of course is nonsense.
> Naming the file semantic-f90-grammar-macros.el does neither fit the
> usual naming scheme nor does it help anyway. Using
> f90-grammar-macros-EXPAND0 does not help as well, since require still
> needs the path. Is there any other solution I have missed? As use-macros
> is not used anywhere, there is no example I could copy from.
>
> There is another quandary, which leads to a simple albeit strange
> workaround: Replacing (require lib) by (require
> 'semantic/wisent/f90-grammar-macros) works fine, until the compiler
> looks in vain for semantic-f90-expand0-auxiliary which is called from
> within semantic-f90-grammar-macros-EXPAND0. Adding a
> %{
>      (require 'semantic/wisent/f90-grammar-macros)
>      ...
> }
> into my f90.wy file solves this problem. Even more, I can now delete the
> (require 'semantic/wisent/f90-grammar-macros) inside of
> semantic-grammar-use-macros and it still compiles. Almost. In fact,
> f90-grammar-macros is compiled after f90.wy, so whenever I edit
> f90-grammar-macros, I need to touch f90.wy and compile twice, or
> something like this. So I also need to add a dependency, but I could not
> figure out how to do this in Project.ede?
> Or am I doing something fundamtally wrong??

I don't think anyone really knows the wiset use-macros corner of the 
system.  The original author hasn't been around in a while.

Based on looking in grammar.wy think you can put / in the symbol name of 
the library that has the macros, as that character is also used by 
%provide, so that should enable you to get the right naming convention.

As for order of compilation, you can just change the order of the files 
in Project.ede to whatever you want.  I hadn't thought to add 
recompilation directives to the ede grammar target.  We'd have to 
upgrade it to support that.

I'm not sure I helped much.
Eric



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