How Can I List the Public Methods of a Go Package?

How to List Public Methods of a Package in Go

Q: How do I list all public methods of a package in Go?

A: Listing public methods of a package in Go is not directly possible due to Go's optimizations that remove unused functions. However, there are potential solutions depending on your use case:

1. Static Analysis:

   • Parse the package source code using go/parser to obtain all function declarations, but note that these are not invokable.

   • Example:

     import (
         "fmt"
         "go/ast"
         "go/parser"
         "go/token"
         "os"
     )
     
     // ...
     
     funcs := []*ast.FuncDecl{}
     for _, pack := range packs {
         for _, f := range pack.Files {
             for _, d := range f.Decls {
                 if fn, isFn := d.(*ast.FuncDecl); isFn {
                     funcs = append(funcs, fn)
                 }
             }
         }
     }
     
     fmt.Printf("all funcs: %+v\n", funcs)

2. External Invocation:

   • Generate a separate file that calls each desired method.
   • Run the generated file to execute the methods.

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