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- Fixed some goal selection issues.

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- Added note about mirroring model checker semantics.
This commit is contained in:
ccremers 2004-08-20 09:21:39 +00:00
parent 7308791c83
commit be44ed047a
1 changed files with 10 additions and 6 deletions
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16
src/arachne.c
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@ -682,7 +682,10 @@ printSemiState ()
//! Goal selection
/**
* Should be ordered to prefer most constrained; for now, it is simply the first one encountered.
* Selects the most constrained goal.
*
* Because the list starts with the newest terms, and we use <= (as opposed to <), we
* ensure that for goals with equal constraint levels, we select the oldest one.
*/
Binding
select_goal ()
@ -701,15 +704,16 @@ select_goal ()
b = (Binding) bl->data;
if (!b->done)
{
// We don't care about singular agent variables, so...
if (!
(isTermVariable (b->term)
&& inTermlist (b->term->stype, TERM_Agent)))
// We don't care about singular variables.
/**
* Note that to mirror the modelchecker semantics, we should check whether the type exists in M_0.
*/
if (!isTermVariable (b->term))
{
float cons;
cons = term_constrain_level (b->term);
if (cons < min_constrain)
if (cons <= min_constrain)
{
min_constrain = cons;
best = b;