Purpose
Perform a single tier reduction that dissolves each top level node in the matched range.
Syntax
merger(number1, number2)
number1 - type: int
number2 - type: int
Returns
Remarks
Example
# Remove the two _adjs nodes
# from the parse tree, merging
# their children under a new
# _adjs node.
@POST
merger(1,2);
@RULES
_adjs <- _adjs _adjs _xyz @@