Enumerate package functions with reflect?

[shka...@gmail.com]

Is it possible to list all functions in a package (not methods) via reflect. E.g.

package example

func Test1() int { return 0 }

func Test2() int { return 0 }

In the example above I need to list Test1 and Test2. Is it possible?

Thank you,

Serge

[Jan Mercl]

fortunately it's not possible.

-j

[chris dollin]

On 16 June 2013 15:19, <shka...@gmail.com> wrote:

Is it possible to list all functions in a package (not methods) via reflect.

No.

This allows the linker to quietly drop on the floor

unreferenced functions, which is generally a Good Thing.

 

In the example above I need to list Test1 and Test2. Is it possible?

Have your own map of names to functions -- for the functions it
actually makes sense for -- and initialise it in init.

Chris

--
Chris "allusive" Dollin

[rocky]

Actually, if you willing to do a bit of work and have the source code around you can probably list the names functions using go/ast and go/parser.  See http://play.golang.org/p/_MKx4YTuvs which is a tiny modification of http://golang.org/pkg/go/ast/#example_Inspect

Run that, you'll see:

         7  .  .  0: *ast.FuncDecl {

     8  .  .  .  Name: *ast.Ident {

     9  .  .  .  .  NamePos: 3:6

    10  .  .  .  .  Name: "Test1"

...

    53  .  .  1: *ast.FuncDecl {

    54  .  .  .  Name: *ast.Ident {

    55  .  .  .  .  NamePos: 7:6

    56  .  .  .  .  Name: "Test2"

    99  .  .  2: *ast.FuncDecl {

   100  .  .  .  Name: *ast.Ident {

   101  .  .  .  .  NamePos: 11:6

   102  .  .  .  .  Name: "main"

...

   162  .  Scope: *ast.Scope {

   163  .  .  Objects: map[string]*ast.Object (len = 3) {

   164  .  .  .  "Test1": *(obj @ 11)

   165  .  .  .  "Test2": *(obj @ 57)

   166  .  .  .  "main": *(obj @ 103)

   167  .  .  }

   168  .  }

(Plug for https://code.google.com/p/go-play/. When I run http://play.golang.org/p/_MKx4YTuvs the useful output is truncated. In the local version of go-play I have output scrollbars and I think nicer output display.)

[Erik Unger]

I have written a tool for that:

https://github.com/ungerik/pkgreflect

-Erik