[sv-ec] Name resolution for inline constraints

I've opened Mantis 1858 and added a proposal for extending inline
constraints to permit "item." prefixes to identifiers.  This arose
from a discussion in the name resolution subgroup about how to
resolve identifiers in an inline constraint when the type of the
class object prefix is not known (a type parameter or similar) and
there is a local binding for the identifier as well.  For example:
    module child (type T = int);
       T c = new;
       int x;
       ....
          c.randomize() with { y < x };

In this case, there are implementation side issues with determining
how to bind "x" and there are user intent issues.  By allowing
something like:
          c.randomize() with { y < item.x };
we can clarify that the intended binding is into "c".

This opens a possible path for dealing with the implementation
side issues -- possible deprecating the unprefixed form or
coming up with rules under which the "item." form would be
required.  That could become a separate discussion once we
have a mechanism for directing resolution into the class
randomization target.

Gord.

-- 
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Gordon Vreugdenhil                                503-685-0808
Model Technology (Mentor Graphics)                gordonv@model.com


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