I'm trying to use the ast and parse packages to find the fields in two
separate structs one that will be called Inputs and the other Outputs.
these can change but as an example i'm trying to parse these
package main
import (
"fmt"
)
type Inputs struct {
Name string `json:"name"`
Age int `json:"age"`
}
type Outputs struct {
Number float `json:"number"`
}
func main() {
fmt.Println("Hello World!")
}
I have the following which can pick out the two structs but i'm now lost on
how to loop through the fields to get name, type and commenty bit
`json:"name"` at the end.
package main
import (
"fmt"
"go/ast"
"go/parser"
"go/token"
"log"
)
func main() {
fset := token.NewFileSet()
file, err := parser.ParseFile(fset, "sample/main.go", nil, 0)
if err != nil {
log.Fatal(err)
}
ast.Walk(VisitorFunc(FindTypes), file)
}
type VisitorFunc func(n ast.Node) ast.Visitor
func (f VisitorFunc) Visit(n ast.Node) ast.Visitor {
return f(n)
}
func FindTypes(n ast.Node) ast.Visitor {
switch n := n.(type) {
case *ast.Package:
return VisitorFunc(FindTypes)
case *ast.File:
return VisitorFunc(FindTypes)
case *ast.GenDecl:
if n.Tok == token.TYPE {
return VisitorFunc(FindTypes)
}
case *ast.TypeSpec:
if n.Name.Name == "Inputs" {
//We have hit the inputs struct
fmt.Println(n.Name.Name)
}
if n.Name.Name == "Outputs" {
//We have hit the outputs struct
fmt.Println(n.Name.Name)
}
}
return nil
}
Any suggestions as to how to do it?
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