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string.c: backref substitution

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* re.c (rb_reg_regsub): allow nil regexp for string matching.

* string.c (rb_str_sub_bang, str_gsub): make substitution if
  replacement string has backref escapes.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-03-28 02:28:16 +00:00
parent 2d82342cf2
commit 2f14bde88f
3 changed files with 29 additions and 15 deletions
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2
test/ruby/test_string.rb
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@ -808,6 +808,7 @@ class TestString < Test::Unit::TestCase
S("hello").gsub(/./) { |s| s[0].to_s + S(' ')})
assert_equal(S("HELL-o"),
S("hello").gsub(/(hell)(.)/) { |s| $1.upcase + S('-') + $2 })
assert_equal(S("<>h<>e<>l<>l<>o<>"), S("hello").gsub(S(''), S('<\0>')))
a = S("hello")
a.taint
@ -1415,6 +1416,7 @@ class TestString < Test::Unit::TestCase
assert_equal(S("HELL-o"), S("hello").sub(/(hell)(.)/) {
|s| $1.upcase + S('-') + $2
})
assert_equal(S("h<e>llo"), S("hello").sub('e', S('<\0>')))
assert_equal(S("a\\aba"), S("ababa").sub(/b/, '\\'))
assert_equal(S("ab\\aba"), S("ababa").sub(/(b)/, '\1\\'))