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40 lines
638 B
40 lines
638 B
package predicate
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type Predicate func() bool
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func (this Predicate) And(predicate Predicate) Predicate {
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return All(this, predicate)
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}
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func (this Predicate) Or(predicate Predicate) Predicate {
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return Any(this, predicate)
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}
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func All(predicates ...Predicate) Predicate {
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return func() bool {
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for _, p := range predicates {
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if !p() {
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return false
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}
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}
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return true
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}
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}
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func Any(predicates ...Predicate) Predicate {
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return func() bool {
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for _, p := range predicates {
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if p() {
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return true
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}
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}
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return false
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}
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}
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func Not(predicate Predicate) Predicate {
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return func() bool {
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return !predicate()
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}
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}
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