Add parser for arbitrary expressions

The expressions can be used in if 'test' and in the
right side of assignements.

The expressions can contain any number of sub-expressions
combined by either arithmetic operators, comparison operators,
or boolean operators.

Random Usage Examples:
$result = ((( $two + 2) / $one) + 4 * 5.45) - (6 << 7) + (0x800 + -9)
or
if ($a < 10) and ($a + 10 != 200) {
...
}

1 files changed, 10 insertions, 4 deletions

diff --git a/lib/puppet/parser/lexer.rb b/lib/puppet/parser/lexer.rb
index 71210d919..5dd036e52 100644
--- a/lib/puppet/parser/lexer.rb
+++ b/lib/puppet/parser/lexer.rb
@@ -126,12 +126,22 @@ class Puppet::Parser::Lexer
         '\\' => :BACKSLASH,
         '=>' => :FARROW,
         '+>' => :PARROW,
+        '+' => :PLUS,
+        '-' => :MINUS,
+        '/' => :DIV,
+        '*' => :TIMES,
+        '<<' => :LSHIFT,
+        '>>' => :RSHIFT,
         %r{([a-z][-\w]*::)+[a-z][-\w]*} => :CLASSNAME,
         %r{((::){0,1}[A-Z][-\w]*)+} => :CLASSREF
     )
 
     TOKENS.add_tokens "Whatever" => :DQTEXT, "Nomatter" => :SQTEXT, "alsonomatter" => :BOOLEAN
 
+    TOKENS.add_token :NUMBER, %r{\b(?:0[xX][0-9A-Fa-f]+|0?\d+(?:\.\d+)?(?:[eE]-?\d+)?)\b} do |lexer, value|
+        [TOKENS[:NAME], value]
+    end
+
     TOKENS.add_token :NAME, %r{[a-z0-9][-\w]*} do |lexer, value|
         string_token = self
         # we're looking for keywords here
@@ -145,10 +155,6 @@ class Puppet::Parser::Lexer
         [string_token, value]
     end
 
-    TOKENS.add_token :NUMBER, %r{[0-9]+} do |lexer, value|
-        [TOKENS[:NAME], value]
-    end
-
     TOKENS.add_token :COMMENT, %r{#.*}, :skip => true
 
     TOKENS.add_token :RETURN, "\n", :skip => true, :incr_line => true, :skip_text => true