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adding hash/eq to uint_set

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-07-27 13:41:41 -07:00
parent 1239c8f8e8
commit 0997eba700
2 changed files with 39 additions and 0 deletions
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27
src/test/uint_set.cpp
View file

@ -131,6 +131,32 @@ static void tst4() {
SASSERT(!s.contains(0));
}
#include "map.h"
template <typename Value>
struct uint_map : public map<uint_set, Value, uint_set::hash, uint_set::eq> {};
static void tst5() {
uint_set s;
std::cout << s.get_hash() << "\n";
s.insert(1);
std::cout << s.get_hash() << "\n";
s.insert(2);
std::cout << s.get_hash() << "\n";
s.insert(44);
std::cout << s.get_hash() << "\n";
uint_map<unsigned> m;
m.insert(s, 1);
s.insert(4);
m.insert(s, 3);
uint_map<unsigned>::iterator it = m.begin(), end = m.end();
for (; it != end; ++it) {
std::cout << it->m_key << " : " << it->m_value << "\n";
}
}
void tst_uint_set() {
for (unsigned i = 0; i < 100; i++) {
tst1(1 + rand()%31);
@ -146,5 +172,6 @@ void tst_uint_set() {
tst3(12);
tst3(100);
tst4();
tst5();
}

12
src/util/uint_set.h
View file

@ -218,6 +218,18 @@ public:
iterator const begin() const { return iterator(*this, false); }
iterator const end() const { return iterator(*this, true); }
unsigned get_hash() const {
unsigned h = 0;
for (unsigned i = 0; i < size(); ++i) {
h += (i+1)*((*this)[i]);
}
return h;
}
struct eq { bool operator()(uint_set const& s1, uint_set const& s2) const { return s1 == s2; } };
struct hash { unsigned operator()(uint_set const& s) const { return s.get_hash(); } };
};
inline std::ostream & operator<<(std::ostream & target, const uint_set & s) {