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bool.go
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bool.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package logic
var _ Item = (*Bool)(nil)
type Bool bool
func (b Bool) Compare(c Item) int {
switch that := c.(type) {
case Bool:
var x, y int
if b {
x = 1
}
if that {
y = 1
}
switch {
case x < y:
return -1
case x > y:
return 1
default:
return 0
}
default:
return -1
}
}
type BoolOperator struct{}
func (b BoolOperator) AND(first Bool, others ...Bool) (Bool, error) {
if !first {
return false, nil
}
for i := range others {
if !others[i] {
return false, nil
}
}
return true, nil
}
func (b BoolOperator) OR(first Bool, others ...Bool) (Bool, error) {
if first {
return true, nil
}
for i := range others {
if others[i] {
return true, nil
}
}
return false, nil
}
func (b BoolOperator) NOT(input Bool) (Bool, error) {
return !input, nil
}