$ echo 'println("Hello!")' | ./playgo
0 *ast.File {
1 . Package: src.go:1:1
2 . Name: *ast.Ident {
3 . . NamePos: src.go:1:9
4 . . Name: "main"
5 . }
6 . Decls: []ast.Decl (len = 1) {
7 . . 0: *ast.FuncDecl {