[crystal tool expand] Can not expand macro in class body of included files.

[LeonLiuY]

Crystal version: 0.24.1

test.cr

macro test
  def to_json
    "hey"
  end
end

class Test
  test
end

main.cr

require "./test"
p Test.new.to_json

Facts

The program has no problem:

$ crystal run main.cr
"hey"

Can expand the macro when the program is set to test.cr

$ crystal tool expand -c test.cr:8:3 test.cr          
1 expansion found
expansion 1:
   test

# expand macro 'test' (/home/liuyang/work/ac-expense-api/test.cr:1:1)
~> def to_json
     "hey"
   end

Can not expand the macro when the program is set to main.cr

$ crystal tool expand -c test.cr:8:3 main.cr          
no expansion found

[LeonLiuY]

Use case

I want to expand the schema macro in Crecto model, but it fails.

class User < Crecto::Model

  schema "users" do
    field :age, Int32 # or use `PkeyValue` alias: `field :age, PkeyValue`
    field :name, String
    field :is_admin, Bool, default: false
    field :temporary_info, Float64, virtual: true
    field :email, String
    has_many :posts, Post, dependent: :destroy
  end

  validate_required [:name, :age]
  validate_format :name, /^[a-zA-Z]*$/
  unique_constraint :email
end

I have my file structure:

models
  user.cr
  ...
app.cr

where app.cr requries libraries needed for the application as the main file. So It's not convenient to use user.cr as the main file of crystal tool expand (compile error)