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authorShea Levy <shea@shealevy.com>2013-07-15T21·10-0400
committerEelco Dolstra <eelco.dolstra@logicblox.com>2013-08-26T09·31+0200
commitafc6c1bad63e27d68adf49e673f8aafd36495a8a (patch)
tree9cfe21245d123b5d7e525aa2722b1e155d29e736 /src/libstore/build.cc
parent6cd6ce56083d0077485896a761520812d039bf10 (diff)
Simplify inherited attribute handling
This reduces the difference between inherited and non-inherited
attribute handling to the choice of which env to use (in recs and lets)
by setting the AttrDef::e to a new ExprVar in the parser rather than
carrying a separate AttrDef::v VarRef member.

As an added bonus, this allows inherited attributes that inherit from a
with to delay forcing evaluation of the with's attributes.

Signed-off-by: Shea Levy <shea@shealevy.com>
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