Re: Fw: [Mesa3d-dev] new glslang plan

[Ian R. <id...@us...>]

Philip RIDEOUT wrote:

> 3) Lack of error rules in the grammar to help recovery from syntax errors.
> 
> It's desirable to keep the grammar simple to help readability in our reference implementation, but I
> agree this would be a nice feature.  Bison is a relatively unsophisticated tool by modern standards,
> which I think prevents us from checking for some types of frequently-made syntax errors (they'd
> cause shift-reduce conflicts, etc).  To do this, we'd have to use something better than bison, or an
> additional tool like Merr.  We want the parser to gain wide acceptance, so we use bison because it's
> so standard.  I agree that this is a two-edged sword.

Does the parser actually /require/ bison or will byacc also work?  I 
only ask because bison has the "interesting quirk" of requiring the 
application link with *GPL* (*not* LGPL) licensed code.  This means that 
any drivers (or Mesa) that use bison auto-magically become GPL.  Good times.