toit

How do I get the class name of an object from "an instance with class-id XX"?

I'm trying to print an object in Toit with print o, but I'm only getting When printing an object it only shows "an instance with class-id 12".

Here is a small example:

class A:

main:
  o := A
  print o

which prints:

an instance with class-id 42
Solution

  • The default stringify method of Object does not include the name of the class. This is to save space. However, an unstripped snapshot does.

    If you first compile your program to a snapshot (toit.compile -w app.snapshot app.toit) then you can use toitp to inspect the snapshot. For example toitp --classes app.snapshot lists all classes with their ids.

    The toit.compile executable is located in the bin folder of the SDK, and the toitp program is located in the tools folder of the SDK.

    You can download the SDK either from https://github.com/toitlang/toit, or, if you use Jaguar, it is also cached in ~/.cache/jaguar/sdk (and a similar path on Windows).