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Feature #6251
closedMagic comments for compile options
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.
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