The lexer recognizes regex delimited by / as in:
/^$/

The match operator is defined by =~
The not match operator is defined by !~

Signed-off-by: Brice Figureau <[email protected]>
---
 lib/puppet/parser/lexer.rb |    7 +++++++
 spec/unit/parser/lexer.rb  |   14 ++++++++++++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/lib/puppet/parser/lexer.rb b/lib/puppet/parser/lexer.rb
index 5bab6d6..56863a2 100644
--- a/lib/puppet/parser/lexer.rb
+++ b/lib/puppet/parser/lexer.rb
@@ -134,6 +134,8 @@ class Puppet::Parser::Lexer
         '*' => :TIMES,
         '<<' => :LSHIFT,
         '>>' => :RSHIFT,
+        '=~' => :MATCH,
+        '!~' => :NOMATCH,
         %r{([a-z][-\w]*)?(::[a-z][-\w]*)+} => :CLASSNAME, # Require '::' in 
the class name, else we'd compete with NAME
         %r{((::){0,1}[A-Z][-\w]*)+} => :CLASSREF
     )
@@ -169,6 +171,11 @@ class Puppet::Parser::Lexer
         [self,value]
     end
 
+    TOKENS.add_token :REGEX, %r{/(.*?)/} do |lexer, value|
+        value.sub!(/^\/(.*?)\/$/,"\\1")
+        [self, Regexp.new(value)]
+    end
+
     TOKENS.add_token :RETURN, "\n", :skip => true, :incr_line => true, 
:skip_text => true
 
     TOKENS.add_token :SQUOTE, "'" do |lexer, value|
diff --git a/spec/unit/parser/lexer.rb b/spec/unit/parser/lexer.rb
index 3c765d4..8b73de1 100755
--- a/spec/unit/parser/lexer.rb
+++ b/spec/unit/parser/lexer.rb
@@ -178,6 +178,8 @@ describe Puppet::Parser::Lexer::TOKENS do
         :TIMES => '*',
         :LSHIFT => '<<',
         :RSHIFT => '>>',
+        :MATCH => '=~',
+        :NOMATCH => '!~',
     }.each do |name, string|
         it "should have a token named #{name.to_s}" do
             Puppet::Parser::Lexer::TOKENS[name].should_not be_nil
@@ -451,6 +453,18 @@ describe Puppet::Parser::Lexer::TOKENS[:VARIABLE] do
     end
 end
 
+describe Puppet::Parser::Lexer::TOKENS[:REGEX] do
+    before { @token = Puppet::Parser::Lexer::TOKENS[:REGEX] }
+
+    it "should match against any expression enclosed in //" do
+        @token.regex.should =~ '/this is a regex/'
+    end
+
+    it "should return the REGEX token and a Regexp" do
+        @token.convert(stub("lexer"), "/myregex/").should == 
[Puppet::Parser::Lexer::TOKENS[:REGEX], Regexp.new(/myregex/)]
+    end
+end
+
 describe Puppet::Parser::Lexer, "when lexing comments" do
     before { @lexer = Puppet::Parser::Lexer.new }
 
-- 
1.6.0.2


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