https://github.com/lestrrat-go/astv

An Alternate Go AST Visitor
https://github.com/lestrrat-go/astv

Last synced: 4 months ago
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An Alternate Go AST Visitor

• Host: GitHub
• URL: https://github.com/lestrrat-go/astv
• Owner: lestrrat-go
• License: mit
• Created: 2021-01-29T02:03:57.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2021-01-29T05:07:16.000Z (over 4 years ago)
• Last Synced: 2025-01-09T03:41:41.289Z (6 months ago)
• Language: Go
• Size: 9.77 KB
• Stars: 2
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# astv - An Alternate Go AST Visitor

Handling Go AST usually involves a huge type switch:

```

func Visit(n ast.Node) ast.Visitor {

  switch n := n.(type) {

  case *ast.BinaryExpr:

    ...

  case *ast.GenDecl:

    ...

  }

}

```

The API in this module compartmentalizes this into Handlers.

The logic will stil be pretty much the same as a huge type switch, but you can organize them into small(er) method calls for better maintainability.

```

func (h *myHandler) BinaryExpr(n *ast.BinaryExpr) bool {

  ...

  return true // return true to keep recursing

}

func (h *myHandler) GenDecl(n *ast.GenDecl) bool {

  ...

  return false // return false to stop recursing

}

v := astv.NewVisitor()

v.Handler(h)

ast.Walk(v, node)

```

# TODO

Way to remove handlers.

Way to get/set individual handlers.