* lisp/progmodes/ruby-mode.el (ruby-expression-expansion-re): Allow to

start at point, so that expansion starting right after opening
slash in a regexp is recognized.
(ruby-syntax-before-regexp-re): New defvar, extracted from
ruby-syntax-propertize-function.  Since the value of this regexp
is looked up at runtime now, we should be able to turn
`ruby-syntax-methods-before-regexp' into a defcustom later.
(ruby-syntax-propertize-function): Split regexp matching into two
parts, for opening and closing slashes.  That allows us to skip
over string interpolations and support multiline regexps.
Don't call `ruby-syntax-propertize-expansions', instead use another rule
for them, which calls `ruby-syntax-propertize-expansion'.
(ruby-syntax-propertize-expansions): Move `remove-text-properties'
call to `ruby-syntax-propertize-function'.
(ruby-syntax-propertize-expansion): Extracted from
`ruby-syntax-propertize-expansions'.  Handles one expansion.
(ruby-syntax-propertize-heredoc): Explicitly call
`ruby-syntax-propertize-expansions'.
(ruby-syntax-propertize-percent-literal): Leave point right after
the percent symbol, so that the expression expansion rule can
propertize the contents.

* test/automated/ruby-mode-tests.el (ruby-heredoc-highlights-interpolations)
(ruby-regexp-skips-over-interpolation)
(ruby-regexp-continues-till-end-when-unclosed)
(ruby-regexp-can-be-multiline)
(ruby-interpolation-inside-percent-literal): New tests.

* test/indent/ruby.rb: Add multiline regexp example.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/indent/ruby.rb b/test/indent/ruby.rb
index 90c6dcdc65c..853f4dbf992 100644
--- a/test/indent/ruby.rb
+++ b/test/indent/ruby.rb
@@ -21,6 +21,11 @@ a = asub / aslb + bsub / bslb;
 # Highlight the regexp after "if".
 x = toto / foo if /do bar/ =~ "dobar"
 
+# Multiline regexp.
+/bars
+ tees # toots
+ nfoos/
+
 def test1(arg)
   puts "hello"
 end
@@ -47,6 +52,8 @@ def test2 (arg)
   case a
   when "a"
     6
+  # Support for this syntax was removed in Ruby 1.9, so we
+  # probably don't need to handle it either.
   # when "b" :
   #   7
   # when "c" : 2