Re: Watchpoints for emacs lisp.

[alin.s]

Richard Stallman wrote:
> 
> The feature is still desired.
> 


I think to do it so:

I insert to the struct Lisp_Symbol a field :watched: .

I write a function whose input it a string S. This function looks for the
given symbol in the corresponding obarray (global and local environment).
When it finds the symbol whose name is S , it sets the flag :watched: to
true.

Afterwards, in ALL functions that are able to change the value of a symbol,
I insert a checkpoint, which looks like that:

<if the symbol to change has the flag :watched: true, that call the
corresponding procedure of the debugger>

Is it ok the algorithm ? In how many obarrays should I look for the given
symbol ?








 





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