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De-templetize Position::is_draw()

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Now that we always check for repetition we don't
need a template anymore.

No functional change.
This commit is contained in:
Marco Costalba
2013-04-10 22:23:48 +02:00
parent 75221fcf5e
commit fe72c93141
3 changed files with 14 additions and 22 deletions
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28
src/position.cpp
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@@ -1376,7 +1376,6 @@ Value Position::compute_non_pawn_material(Color c) const {
/// Position::is_draw() tests whether the position is drawn by material,
/// repetition, or the 50 moves rule. It does not detect stalemates, this
/// must be done by the search.
template<bool SkipRepetition>
bool Position::is_draw() const {
// Draw by material?
@@ -1389,33 +1388,26 @@ bool Position::is_draw() const {
return true;
// Draw by repetition?
if (!SkipRepetition)
int i = 4, e = std::min(st->rule50, st->pliesFromNull);
if (i <= e)
{
int i = 4, e = std::min(st->rule50, st->pliesFromNull);
StateInfo* stp = st->previous->previous;
if (i <= e)
{
StateInfo* stp = st->previous->previous;
do {
stp = stp->previous->previous;
do {
stp = stp->previous->previous;
if (stp->key == st->key)
return true;
if (stp->key == st->key)
return true;
i += 2;
i += 2;
} while (i <= e);
}
} while (i <= e);
}
return false;
}
// Explicit template instantiations
template bool Position::is_draw<false>() const;
template bool Position::is_draw<true>() const;
/// Position::flip() flips position with the white and black sides reversed. This
/// is only useful for debugging especially for finding evaluation symmetry bugs.