An over enthusiastic warning ?

[Bjorn Gustavsson]

Roger Price <rprice@REDACTED> writes:

[...]
> It seems to me that these warnings should have been suppressed in view of 
> the leading "_".
> 

Using variables starting with underscore only suppress warnings
for unused variables.

To suppress warnings for shadow, you can add the following line to the generated

-compile(nowarn_shadow_vars).

module.

> 
> [1] An implementation of the Augustsson/Wadler pattern matching compiler 
> described in chapter 5 of "The implementation of functional programming 
> languages" by Simon L Peyton Jones.
> 

For learning purposes, I suppose?

The Beam compiler already implements that same algorithm.

/Bjorn
-- 
Björn Gustavsson, Erlang/OTP, Ericsson AB