[antlr-interest] AST node

[Henry Butowsky]

Hi Guys,
I need my tree parser to add the child node "NORET" to  an expression

text :  a0=cos(pi=3.14159));
tree:             ( EXPR ( = a0 ( cos ( func_arg ( = pi 3.14159 ) ) ) ) )
New Tree :   ( EXPR ( = a0 NORET ( cos ( func_arg ( = pi 3.14159 ) ) ) ) )



text:  f1[$lon]={1,2,3,4.0}
tree:  ( EXPR ( = ( f1 ( dmn_list lon ) ) ( value_list 1 2 3 4.0 ) ) )
New Tree: ( EXPR ( = ( f1 ( dmn_list lon ) NORET ) ( value_list 1 2 3 
4.0 ) ) )

How do I create the child node & how do I add it to the tree.
I've looked at all the create methods in ASTFactory but they seem to 
require some ASTPair thing.
All the methods in AST.hpp are for an existing Ref

Help please

Regards Henry