nitc: ANode::dump_tree can skip structural nodes

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/parser/parser_nodes.nit b/src/parser/parser_nodes.nit
index b8d715d..1d68c6f 100644 (file)
--- a/src/parser/parser_nodes.nit
+++ b/src/parser/parser_nodes.nit
@@ -39,9 +39,9 @@ abstract class ANode
 
        # Write the subtree on stdout.
        # See `ASTDump`
-       fun dump_tree
+       fun dump_tree(display_structural: nullable Bool)
        do
-               var d = new ASTDump
+               var d = new ASTDump(display_structural or else true)
                d.enter_visit(self)
                d.write_to(sys.stdout)
        end
@@ -180,8 +180,14 @@ class ASTDump
        # Is used to handle the initial node parent and workaround possible inconsistent `ANode::parent`
        private var last_parent: nullable ANode = null
 
+       # Display tokens and structural production?
+       #
+       # Should tokens (and structural production like AQId) be displayed?
+       var display_structural: Bool
+
        redef fun visit(n)
        do
+               if not display_structural and n.is_structural then return
                var p = last_parent
                add(p, n)
                last_parent = n