// Copyright 2016 The OPA Authors.  All rights reserved.
// Use of this source code is governed by an Apache2
// license that can be found in the LICENSE file.

package ast

import v1 "github.com/open-policy-agent/opa/v1/ast"

// Unify returns a set of variables that will be unified when the equality expression defined by
// terms a and b is evaluated. The unifier assumes that variables in the VarSet safe are already
// unified.
func Unify(safe VarSet, a *Term, b *Term) VarSet {
	return v1.Unify(safe, a, b)
}