cuelang.org/go@v0.13.0/cue/ast/astutil/walk.go (about)

     1  // Copyright 2018 The CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package astutil
    16  
    17  import "cuelang.org/go/cue/ast"
    18  
    19  // A visitor's before method is invoked for each node encountered by Walk.
    20  // If the result visitor w is true, Walk visits each of the children
    21  // of node with the visitor w, followed by a call of w.After.
    22  type visitor interface {
    23  	Before(node ast.Node) (w visitor)
    24  	After(node ast.Node)
    25  }