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author | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-08-21 20:47:53 +0000 |
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committer | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-08-21 20:47:53 +0000 |
commit | 76da83bda95f1b8f304940a03647c51e1d4481ce (patch) | |
tree | 93119a59a19abdd3a1d931fc27c5828b234418e8 /test | |
parent | 3df0c05d411576880a9e0aff16630fe5a9a08a99 (diff) | |
download | ruby-76da83bda95f1b8f304940a03647c51e1d4481ce.tar.gz |
* 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.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51659 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
-rw-r--r-- | test/ruby/test_iseq.rb | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/ruby/test_iseq.rb b/test/ruby/test_iseq.rb index 686646ddd8..3938fb3d48 100644 --- a/test/ruby/test_iseq.rb +++ b/test/ruby/test_iseq.rb @@ -141,4 +141,17 @@ class TestISeq < Test::Unit::TestCase assert_raise(TypeError, bug11159) {ISeq.compile(:foo)} assert_raise(TypeError, bug11159) {ISeq.compile(1)} end + + def test_frozen_string_literal_compile_option + $f = 'f' + line = __LINE__ + 2 + code = <<-'EOS' + ['foo', 'foo', "#{$f}foo"] + EOS + s1, s2, s3 = RubyVM::InstructionSequence.compile(code, __FILE__, __FILE__, line, {frozen_string_literal: true}).eval + assert(s1.frozen?) + assert(s2.frozen?) + assert(s3.frozen?) + assert(s1.object_id == s2.object_id) + end end |