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behavioral/visitor: add more explanations to visitor implementation

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Serge Bishyr 2017-10-18 16:38:00 +03:00
parent 7ba8e00dff
commit 6df1cb57f1
1 changed files with 3 additions and 2 deletions
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behavioral/visitor.md
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@ -4,6 +4,7 @@ Visitor behavioral design pattern provides a way to separate an algorithm from a
It gives the ability to extend the existing object without modifying the object itself. It gives the ability to extend the existing object without modifying the object itself.
## Implementation ## Implementation
Implementation of a visitor that can add functionality to the shape structures.
```go ```go
type Visitor interface { type Visitor interface {
@ -34,7 +35,7 @@ func (l Line) accept(v Visitor) string {
## Usage ## Usage
### JSON marshaller ### JSON marshaller
Using visitor to marshal shapes to JSON
```go ```go
type JsonVisitor struct { type JsonVisitor struct {
} }
@ -57,7 +58,7 @@ fmt.Println(line.accept(&jsonVisitor))
``` ```
### XML marshaller ### XML marshaller
Using visitor to marshal shapes to XML
```go ```go
type XmlVisitor struct { type XmlVisitor struct {
} }