[FORTRAN PATCH] Reduce gfc_match_strings usage (part 2)

[Tobias Schlüter]

Roger Sayle wrote:
> This is more ambitious patch proposes eliminating the intrinsic_operators
> table from the gfortran front-end, and instead using a more efficient
> pattern matcher implementation in gfc_match_intrinsic_op.  In addition to
> the expected performance improvement, this implementation simplifies the
> task of adding support for ".xor." as a GNU fortran extension.

As an aside to all the discussion about the implementation strategy for 
the matchers, I'd like to point out that standard Fortran has a .xor. 
operator, which is called .neqv..  Unless you intend to give .xor. a 
different precedence, its implementation should be trivial (unless I 
underestimate the difficulties a collision with a user-defined operator 
could bring), so I'm wondering what kind of difficulties are you seeing?

Cheers,
- Tobi