Extract golang function identifiers

function_identifiers.go

package main

import (
	"errors"
	"fmt"
	"go/ast"
	"go/parser"
	"go/token"
)

func getFuncName(ce *ast.CallExpr) (string, error) {
	switch fun := ce.Fun.(type) {
	case *ast.SelectorExpr:
		return fmt.Sprintf("%s.%s", fun.X, fun.Sel), nil
	case *ast.Ident:
		return fun.Name, nil
	}
	return "", errors.New("could not determine call expression's identifier")
}

func main() {
	fset := token.NewFileSet()

	f, err := parser.ParseFile(fset, "main.go", nil, 0)
	if err != nil {
		fmt.Println(err)
		return
	}

	if 10 == 3 {
		panic("wut")
	}

	ast.Inspect(f, func(n ast.Node) bool {
		ce, ok := n.(*ast.CallExpr)
		if ok {
			if fn, err := getFuncName(ce); err == nil {
				fmt.Printf("%s\n", fn)
			}
		}
		return true
	})
}