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#ifndef VARIABLE_ASSIGNMENT_HPP
#define VARIABLE_ASSIGNMENT_HPP
#include "Variable.hpp"
#include <ostream>
template<typename T>
struct VariableAssignment {
VariableAssignment(unsigned int length)
: _length(length), _assignment(new T[length]) {
for (unsigned int i = 0; i < _length; ++i) {
_assignment[i] = -infinity<T>();
}
}
VariableAssignment(unsigned int length, const T& initial)
: _length(length), _assignment(new T[length]) {
for (unsigned int i = 0; i < _length; ++i) {
_assignment[i] = initial;
}
}
VariableAssignment(const VariableAssignment& other)
: _length(other._length), _assignment(new T[other._length]) {
for (unsigned int i = 0; i < _length; ++i) {
_assignment[i] = other._assignment[i];
}
}
~VariableAssignment() {
delete[] _assignment;
}
VariableAssignment& operator=(const VariableAssignment& other) {
delete[] _assignment;
_length = other._length;
_assignment = new T[_length];
for (unsigned int i = 0; i < _length; ++i) {
_assignment[i] = other._assignment[i];
}
return *this;
}
const T& operator[] (const Variable<T>& x) const {
if (x.id() >= _length) {
throw "Array out of bounds";
}
return _assignment[x.id()];
}
T& operator[] (const Variable<T>& x) {
if (x.id() >= _length) {
throw "Array out of bounds";
}
return _assignment[x.id()];
}
VariableAssignment<T> expand(const VariableAssignment<T>& other) {
return expand(other, infinity<T>());
}
VariableAssignment<T> expand(const VariableAssignment<T>& other, const T& value) {
VariableAssignment<T> expansion(_length);
for (unsigned int i = 0; i < _length; ++i) {
if (_assignment[i] == other._assignment[i]) {
expansion._assignment[i] = _assignment[i];
} else {
expansion._assignment[i] = value;
}
}
return expansion;
}
bool operator==(const VariableAssignment& other) const {
if (_length != other._length)
return false;
for (unsigned int i = 0; i < _length; ++i) {
if (_assignment[i] != other._assignment[i]) {
return false;
}
}
return true;
}
bool operator!=(const VariableAssignment& other) const {
return !(*this == other);
}
private:
unsigned int _length;
T* _assignment;
};
#endif
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