gistfile1.txt

~/Dropbox/tmp
❯ head -n 20 test.rb
# encoding: utf-8

def foo(i)
  !!i
end

def bar(i)
  i ? true : false
end

def baz(i)
  false | i
end

%i[ foo bar baz ].each do |meth|
  puts RubyVM::InstructionSequence.disasm(method(meth))
end

__END__


~/Dropbox/tmp
❯ ruby test.rb
== disasm: <RubyVM::InstructionSequence:foo@test.rb>====================
local table (size: 2, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, keyword: 0@3] s1)
[ 2] i<Arg>
0000 trace            8                                               (   3)
0002 trace            1                                               (   4)
0004 getlocal_OP__WC__0 2
0006 opt_not          <callinfo!mid:!, argc:0, ARGS_SKIP>
0008 opt_not          <callinfo!mid:!, argc:0, ARGS_SKIP>
0010 trace            16                                              (   5)
0012 leave                                                            (   4)
== disasm: <RubyVM::InstructionSequence:bar@test.rb>====================
local table (size: 2, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, keyword: 0@3] s1)
[ 2] i<Arg>
0000 trace            8                                               (   7)
0002 trace            1                                               (   8)
0004 getlocal_OP__WC__0 2
0006 branchunless     12
0008 putobject        true
0010 jump             16
0012 trace            1
0014 putobject        false
0016 trace            16                                              (   9)
0018 leave                                                            (   8)
== disasm: <RubyVM::InstructionSequence:baz@test.rb>====================
local table (size: 2, argc: 1 [opts: 0, rest: -1, post: 0, block: -1, keyword: 0@3] s1)
[ 2] i<Arg>
0000 trace            8                                               (  11)
0002 trace            1                                               (  12)
0004 putobject        false
0006 getlocal_OP__WC__0 2
0008 opt_send_simple  <callinfo!mid:|, argc:1, ARGS_SKIP>
0010 trace            16                                              (  13)
0012 leave                                                            (  12)