[antlr-interest] BASIC if-then-else-endif

[Juan Fernando Herrera J.]

I'm trying to build an AST for if-then-else-endif like in BASIC. I'm trying

    prog:   ( ast {System.out.println($ast.tree.toStringTree());} )+ EOF;

    ast:   'if' condition a=thenstat b=elsestat 'endif' -> ^('if'
condition $a $b);

    thenstat: 'then'^ stat+;

    elsestat: 'else'^ stat+;

    stat:  'print'^ INT;

This gets me

    (if true (then (print 1) (print 2) (print 3)) (else (print 4)
(print 5) (print 6)))

However, I'd like to get

    (if true ((print 1) (print 2) (print 3)) ((print 4) (print 5) (print 6)))

How can I do it?

JH