github.com/rohankumardubey/aresdb@v0.0.2-0.20190517170215-e54e3ca06b9c/query/sql/tree/Node.go (about)

     1  //  Copyright (c) 2017-2018 Uber Technologies, Inc.
     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 tree
    16  
    17  // NodeLocation is position
    18  type NodeLocation struct {
    19  	// Line is #line
    20  	Line int
    21  	// CharPosition is #col
    22  	CharPosition int
    23  }
    24  
    25  // INode is interface
    26  type INode interface {
    27  	SetValue(value string)
    28  	GetValue() string
    29  	Accept(visitor AstVisitor, ctx interface{}) interface{}
    30  }
    31  
    32  // Node is INode
    33  type Node struct {
    34  	// Location is node location
    35  	Location *NodeLocation
    36  	value    string
    37  }
    38  
    39  // NewNode creates Node
    40  func NewNode(location *NodeLocation) *Node {
    41  	return &Node{
    42  		Location: location,
    43  	}
    44  }
    45  
    46  // SetValue sets node token value
    47  func (n *Node) SetValue(value string) {
    48  	n.value = value
    49  }
    50  
    51  // GetValue returns node token value
    52  func (n *Node) GetValue() string {
    53  	return n.value
    54  }
    55  
    56  // Accept accepts visitor
    57  func (n *Node) Accept(visitor AstVisitor, ctx interface{}) interface{} {
    58  	return visitor.visitNode(n, ctx)
    59  }