336a38081a
Done with: ack '2020+' -l | xargs sed -i -e 's/2020+/2021+/g' Checked manually with: git add -p Hello to future James from 2022, and Happy Hacking!
55 lines
2.1 KiB
Go
55 lines
2.1 KiB
Go
// Mgmt
|
|
// Copyright (C) 2013-2021+ James Shubin and the project contributors
|
|
// Written by James Shubin <james@shubin.ca> and the project contributors
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package unification
|
|
|
|
import (
|
|
"github.com/purpleidea/mgmt/lang/interfaces"
|
|
)
|
|
|
|
// ExprListToExprMap converts a list of expressions to a map that has the unique
|
|
// expr pointers as the keys. This is just an alternate representation of the
|
|
// same data structure. If you have any duplicate values in your list, they'll
|
|
// get removed when stored as a map.
|
|
func ExprListToExprMap(exprList []interfaces.Expr) map[interfaces.Expr]struct{} {
|
|
exprMap := make(map[interfaces.Expr]struct{})
|
|
for _, x := range exprList {
|
|
exprMap[x] = struct{}{}
|
|
}
|
|
return exprMap
|
|
}
|
|
|
|
// ExprMapToExprList converts a map of expressions to a list that has the unique
|
|
// expr pointers as the values. This is just an alternate representation of the
|
|
// same data structure.
|
|
func ExprMapToExprList(exprMap map[interfaces.Expr]struct{}) []interfaces.Expr {
|
|
exprList := []interfaces.Expr{}
|
|
// TODO: sort by pointer address for determinism ?
|
|
for x := range exprMap {
|
|
exprList = append(exprList, x)
|
|
}
|
|
return exprList
|
|
}
|
|
|
|
// UniqueExprList returns a unique list of expressions with no duplicates. It
|
|
// does this my converting it to a map and then back. This isn't necessarily the
|
|
// most efficient way, and doesn't preserve list ordering.
|
|
func UniqueExprList(exprList []interfaces.Expr) []interfaces.Expr {
|
|
exprMap := ExprListToExprMap(exprList)
|
|
return ExprMapToExprList(exprMap)
|
|
}
|