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Simplify inherited attribute handling

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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>
This commit is contained in:
Shea Levy 2013-07-15 17:10:18 -04:00 • committed by Eelco Dolstra
parent 6cd6ce5608
commit afc6c1bad6
7 changed files with 46 additions and 38 deletions
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2
src/libexpr/eval.hh
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@ -206,7 +206,7 @@ private:
void addPrimOp(const string & name,
unsigned int arity, PrimOpFun primOp);
inline Value * lookupVar(Env * env, const VarRef & var, bool noEval = false);
inline Value * lookupVar(Env * env, const VarRef & var, bool noEval);
friend class ExprVar;
friend class ExprAttrs;