Some regexp returns "compilation error: U_REGEX_RULE_SYNTAX".

[watson1978@…]

I attach a UnitTest of Ruby 1.9.2 preview 3. Some regexp returns "compilation error" in this UnitTest.

$ macruby test_regexp.rb 
test_regexp.rb:76: regexp `&(?<foo>.*?);' compilation error: U_REGEX_RULE_SYNTAX
test_regexp.rb:84: regexp `&(?<foo>.*?);' compilation error: U_REGEX_RULE_SYNTAX
test_regexp.rb:87: regexp `&(?<foo>.*?); (y)' compilation error: U_REGEX_RULE_SYNTAX
test_regexp.rb:91: regexp `&(?<foo>.*?); (?<bar>y)' compilation error: U_REGEX_RULE_SYNTAX
test_regexp.rb:93: regexp `&(?<foo>.*?); (?<foo>y)' compilation error: U_REGEX_RULE_SYNTAX
test_regexp.rb:95: regexp `(?<id>[A-Za-z_]+)' compilation error: U_REGEX_RULE_SYNTAX
---- snip ----

[lsansonetti@…]

Named captures are not yet supported. They used to work until we rewrote the RE layer using ICU. It is possible to make them work by pre-parsing the regexps during parsing phase and appropriately creating locals, but this may not happen for 0.7.

[tglee@…]

~#1018

[mattaimonetti@…]

Duplicate of #1018