Add Unicode support, first stab at solving #34

Author: MattDMo

Regular Expressions (PythonImproved).YAML-tmLanguage

@@ -6,6 +6,8 @@ fileTypes: [re]
 uuid: DD867ABF-1EC6-415D-B047-687F550A1D51
 
 patterns:
+- match: \(.*$
+
 - name: keyword.control.anchor.regexp
   match: \\[bBAZzG]|\^|\$
 
@@ -25,13 +27,13 @@ patterns:
 - comment: We are restrictive in what we allow to go after the comment character to
     avoid false positives, since the availability of comments depend on regexp flags.
   name: comment.line.number-sign.regexp
-  match: (?<=^|\s)#\s[[a-zA-Z0-9,. \t?!-:][^\x{00}-\x{7F}]]*$
+  match: (?<=^|\s)#\s[[\p{Alnum},. \t?!-:][^\x{00}-\x{7F}]]*$
 
 - name: keyword.other.option-toggle.regexp
   match: \(\?[iLmsux]+\)
 
 - name: keyword.other.back-reference.named.regexp
-  match: (\()(\?P=([a-zA-Z_][a-zA-Z_0-9]*\w*))(\))
+  match: (\()(\?P=([\p{Alpha}_][\p{Alnum}_]*\w*))(\))
 
 - name: meta.group.assertion.regexp
   begin: (\()((\?=)|(\?!)|(\?<=)|(\?<!))
@@ -51,7 +53,7 @@ patterns:
 - comment: we can make this more sophisticated to match the | character that separates
     yes-pattern from no-pattern, but it's not really necessary.
   name: meta.group.assertion.conditional.regexp
-  begin: (\()(\?\(([1-9][0-9]?|[a-zA-Z_][a-zA-Z_0-9]*)\))
+  begin: (\()(\?\(([1-9][0-9]?|[\p{Alpha}_][\p{Alnum}_]*)\))
   beginCaptures:
     '1': {name: punctuation.definition.group.regexp}
     '2': {name: punctuation.definition.group.assertion.conditional.regexp}
@@ -61,7 +63,7 @@ patterns:
   - include: $self
 
 - name: meta.group.regexp
-  begin: (\()((\?P<)([A-Za-z]\w*)(>)|(\?:))?
+  begin: (\()((\?P<)([\p{Alpha}]\w*)(>)|(\?:))?
   beginCaptures:
     '1': {name: punctuation.definition.group.regexp}
     '3': {name: punctuation.definition.group.capture.regexp}