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Feature #6251

Magic comments for compile options

Added by shugo (Shugo Maeda) over 5 years ago. Updated over 2 years ago.

Status:
Feedback
Priority:
Normal
Target version:
-
[ruby-core:44105]

Description

Currently, compile options can be set by RubyVM::InstructionSequence.compile_option=.
However, it takes effect only on code compiled after the options are set.

So, how about to add new magic comments for compile options?
For example, the following code sets the options tailcall_optimization and trace_instruction.

  # -*- tailcall-optimization: true; trace-instruction: false -*-

  def fact(n, i = 1)
    if n == 0
      i
    else
      fact(n - 1, n * i)
    end
  end
  p fact(10000)

With the attached patch, magic comments in the main script sets global options, and magic comments in a required library are effective only in that library.

magic-comments-for-compile-options.diff (7.66 KB) magic-comments-for-compile-options.diff shugo (Shugo Maeda), 04/03/2012 06:20 PM

History

#1 [ruby-core:44108] Updated by mame (Yusuke Endoh) over 5 years ago

  • Status changed from Open to Assigned

#2 [ruby-core:48372] Updated by ko1 (Koichi Sasada) about 5 years ago

  • Target version changed from 2.0.0 to Next Major

Sorry, I can't implement it until 2.0 release.

#3 Updated by ko1 (Koichi Sasada) over 2 years ago

  • Description updated (diff)
  • Status changed from Assigned to Feedback
  • Assignee changed from ko1 (Koichi Sasada) to matz (Yukihiro Matsumoto)

I have no idea such magic comment is acceptable or not.

Matz's issue?

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