Add a doc attribute to AST nodes and fill it with the last seen comments

The lexer maintains a stack of last seen comments.
On blank lines the lexer flush the comments.
On each opening brace the lexer enters a new stack level.
On each block AST nodes, the stack is popped.

Each AST nodes has a doc property that is filled with the
last seen comments on node creation (in fact only on important node
creation representing statements).

Signed-off-by: Brice Figureau <brice-puppet@daysofwonder.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/puppet/parser/ast/node.rb b/lib/puppet/parser/ast/node.rb
index 2bf6c1882..442518f44 100644
--- a/lib/puppet/parser/ast/node.rb
+++ b/lib/puppet/parser/ast/node.rb
@@ -3,6 +3,9 @@ require 'puppet/parser/ast/hostclass'
 # The specific code associated with a host.  Nodes are annoyingly unlike
 # other objects.  That's just the way it is, at least for now.
 class Puppet::Parser::AST::Node < Puppet::Parser::AST::HostClass
+
+    associates_doc
+
     @name = :node
 
     def initialize(options)