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binary_operator_commutative.go
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binary_operator_commutative.go
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// Copyright (c) 2013 Couchbase, Inc.
// Licensed 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 ast
import ()
type CommutativeBinaryOperator struct {
BinaryOperator
}
func (this *CommutativeBinaryOperator) EquivalentTo(t Expression) bool {
// another binary operator?
that, ok := t.(BinaryOperatorExpression)
if !ok {
return false
}
// same type of operator?
if this.operator != that.Operator() {
return false
}
// same operands?
if this.Left.EquivalentTo(that.GetLeft()) &&
this.Right.EquivalentTo(that.GetRight()) {
return true
} else if this.Left.EquivalentTo(that.GetRight()) &&
this.Right.EquivalentTo(that.GetLeft()) {
return true
}
return false
}