| // Copyright 2019 CUE Authors |
| // |
| // 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 astutil |
| |
| import "cuelang.org/go/cue/ast" |
| |
| // CopyComments associates comments of one node with another. |
| // It may change the relative position of comments. |
| func CopyComments(to, from ast.Node) { |
| if from == nil { |
| return |
| } |
| ast.SetComments(to, from.Comments()) |
| } |
| |
| // CopyPosition sets the position of one node to another. |
| func CopyPosition(to, from ast.Node) { |
| if from == nil { |
| return |
| } |
| ast.SetPos(to, from.Pos()) |
| } |
| |
| // CopyMeta copies comments and position information from one node to another. |
| // It returns the destination node. |
| func CopyMeta(to, from ast.Node) ast.Node { |
| if from == nil { |
| return to |
| } |
| ast.SetComments(to, from.Comments()) |
| ast.SetPos(to, from.Pos()) |
| return to |
| } |