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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
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*-*-c-*-*/
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/**********************************************************************
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vm_opts.h - VM optimize option
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$Author$
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Copyright (C) 2004-2007 Koichi Sasada
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**********************************************************************/
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#ifndef RUBY_VM_OPTS_H
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#define RUBY_VM_OPTS_H
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/* Compile options.
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* You can change these options at runtime by VM::CompileOption.
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* Following definitions are default values.
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*/
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#define OPT_TRACE_INSTRUCTION 1
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#define OPT_TAILCALL_OPTIMIZATION 0
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#define OPT_PEEPHOLE_OPTIMIZATION 1
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#define OPT_SPECIALISED_INSTRUCTION 1
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#define OPT_INLINE_CONST_CACHE 1
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#define OPT_FROZEN_STRING_LITERAL 0
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/* Build Options.
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* You can't change these options at runtime.
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*/
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/* C compiler dependent */
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#define OPT_DIRECT_THREADED_CODE 1
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#define OPT_TOKEN_THREADED_CODE 0
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#define OPT_CALL_THREADED_CODE 0
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/* VM running option */
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#define OPT_CHECKED_RUN 1
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#define OPT_INLINE_METHOD_CACHE 1
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#define OPT_GLOBAL_METHOD_CACHE 1
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#define OPT_BLOCKINLINING 0
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/* architecture independent, affects generated code */
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#define OPT_OPERANDS_UNIFICATION 1
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#define OPT_INSTRUCTIONS_UNIFICATION 0
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#define OPT_UNIFY_ALL_COMBINATION 0
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#define OPT_STACK_CACHING 0
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/* misc */
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#define SUPPORT_JOKE 0
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#ifndef VM_COLLECT_USAGE_DETAILS
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#define VM_COLLECT_USAGE_DETAILS 0
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#endif
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#endif /* RUBY_VM_OPTS_H */
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