neo-go/pkg/vm/stack/boolean.go
dauTT 1fbc0af5db VM: Implement BOOLAND, BOOLOR opcode (#251)
* Implemented BOOLAND, BOOLOR opcode
2019-03-29 21:22:44 +00:00

46 lines
1.1 KiB
Go

package stack
// Boolean represents a boolean value on the stack
type Boolean struct {
*abstractItem
val bool
}
//NewBoolean returns a new boolean stack item
func NewBoolean(val bool) *Boolean {
return &Boolean{
&abstractItem{},
val,
}
}
// Boolean overrides the default implementation
// by the abstractItem, returning a Boolean struct
func (b *Boolean) Boolean() (*Boolean, error) {
return b, nil
}
// Value returns the underlying boolean value
func (b *Boolean) Value() bool {
return b.val
}
// Not returns a Boolean whose underlying value is flipped.
// If the value is True, it is flipped to False and viceversa
func (b *Boolean) Not() *Boolean {
return NewBoolean(!b.Value())
}
// And returns a Boolean whose underlying value is obtained
// by applying the && operator to two Booleans' values.
func (b *Boolean) And(a *Boolean) *Boolean {
c := b.Value() && a.Value()
return NewBoolean(c)
}
// Or returns a Boolean whose underlying value is obtained
// by applying the || operator to two Booleans' values.
func (b *Boolean) Or(a *Boolean) *Boolean {
c := b.Value() || a.Value()
return NewBoolean(c)
}