Re: autoload, javadot, symbol-macrolet, define-symbol-macro

Jamie Stephens wrote:

> Folks,
> 
> Has anybody added a little (?) facility that invokes
> a procedure on a symbol when that symbol is evaluated
> and found to be unbound?

One way to do this is to catch the "undefined variable" error, extract 
the variable name, use putprop to establish a binding, and invoke the 
error continuation with the value.

Unfortunately that doesn't work because of bug 1083612.

Also, since this is using the standard error handling facilities, a) 
dynamic wind 'before' and 'after' thunks will be invoked as necessary, 
which may not be correct, b) the error may be caught be error handlers 
further down the call chain.


Matthias.




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