Feature #14478 ยป 0001-String-uminus-dedupes-unconditionally.patch
| spec/ruby/core/string/uminus_spec.rb | ||
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(-"unfrozen string").should_not equal(-"another unfrozen string")
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end
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it "is an identity function if the string is frozen" do
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it "deduplicates frozen strings" do
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dynamic = %w(this string is frozen).join(' ').freeze
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(-dynamic).should equal(dynamic)
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dynamic.should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal("this string is frozen".freeze)
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(-dynamic).should_not equal(-"this string is frozen".freeze)
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(-dynamic).should equal("this string is frozen".freeze)
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(-dynamic).should equal(-"this string is frozen".freeze)
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end
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end
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end
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| string.c | ||
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* call-seq:
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* -str -> str (frozen)
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*
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* If the string is frozen, then return the string itself.
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* Return a frozen, possibly pre-existing
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* copy of the string.
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*
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* If the string is not frozen, return a frozen, possibly pre-existing
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* copy of it.
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* String will be deduplicated as long as it is not tainted,
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* or has any instance vars set on it.
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*/
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static VALUE
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str_uminus(VALUE str)
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{
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if (OBJ_FROZEN(str)) {
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return str;
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}
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else {
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return rb_fstring(str);
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}
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return rb_fstring(str);
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}
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RUBY_ALIAS_FUNCTION(rb_str_dup_frozen(VALUE str), rb_str_new_frozen, (str))
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-
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