Question about macro raise in the function which generated by macro

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This question comes from my project CrSignals. I have a macro to generate methods. The methods will report compile time error if it is called with invalid argument types. I find that the error leak the macro, and I don’t know how to hide the macro.

The example code

macro gen_foo
  def foo(*args)
    {% verbatim do %}
      {% @def.name.raise "Oops!" %}
    {% end %}
  end
end

gen_foo
foo(1, 2, 3)

Compile without --error-trace

[developer@crystal-dev tmp]$ ../bin/crystal test1.cr                                                                                                                          
Using compiled compiler at /home/developer/workspace/.build/crystal                                                                                                           
Showing last frame. Use --error-trace for full trace.                                                                                                                         
                                                                                                                                                                              
In test1.cr:9:1                                                                                                                                                              
                                                                                                                                                                              
 9 | gen_foo                                                                                                                                                                 
      ^                                                                                                                                                                       
Error: Oops!

Compile with --error-trace

[developer@crystal-dev tmp]$ ../bin/crystal test1.cr --error-trace                                                                                                            
Using compiled compiler at /home/developer/workspace/.build/crystal                                                                                                           
In test1.cr:10:1                                                                                                                                                              
                                                                                                                                                                              
 10 | foo(1, 2, 3)                                                                                                                                                            
      ^--                                                                                                                                                                     
Error: instantiating 'foo(Int32, Int32, Int32)'                                                                                                                               
                                                                                                                                                                              
                                                                                                                                                                              
In test1.cr:9:1                                                                                                                                                               
                                                                                                                                                                              
 9 | gen_foo                                                                                                                                                                  
     ^                                                                                                                                                                        
Error: Oops!

Purpose

Hide gen_foo in error report.

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