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/hostclass.rb b/lib/puppet/parser/ast/hostclass.rb
index 4f5c4797c..23d9a00e5 100644
--- a/lib/puppet/parser/ast/hostclass.rb
+++ b/lib/puppet/parser/ast/hostclass.rb
@@ -4,6 +4,9 @@ require 'puppet/parser/ast/definition'
 # in that each class is a singleton -- only one will exist for a given
 # node.
 class Puppet::Parser::AST::HostClass < Puppet::Parser::AST::Definition
+
+    associates_doc
+
     @name = :class
 
     # Are we a child of the passed class?  Do a recursive search up our