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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 35 |
1 files changed, 35 insertions, 0 deletions
@@ -1,3 +1,38 @@ +Sat Aug 22 05:31:37 2015 Koichi Sasada <ko1@atdot.net> + + * vm_opts.h, iseq.c, iseq.h: add compile option to force frozen + string literals. + [Feature #11473] + + This addition is not specification change, but to try frozen + string literal world discussed on [Feature #11473]. + + You can try frozen string literal world using this magical line: + + RubyVM::InstructionSequence.compile_option = + {frozen_string_literal: true} + + Note that this is a global compilation option, so that you need to + compile another script like that: + + p 'foo'.frozen? #=> false + RubyVM::InstructionSequence.compile_option = + {frozen_string_literal: true} + p 'foo'.frozen? #=> false, because this line is already compiled. + p eval("'foo'.frozen?") #=> true + + Details: + * String literals are deduped by rb_fstring(). + * Dynamic string literals ("...#{xyz}...") is now only frozen, + not deduped. Maybe you have other ideas. + + Now, please do not use this option on your productions :) + Of course, current specification can be changed. + + * compile.c: ditto. + + * test/ruby/test_iseq.rb: add a test. + Sat Aug 22 02:53:12 2015 Aaron Patterson <tenderlove@ruby-lang.org> * ext/psych/*: update to Psych 2.0.14 |