[type]
CompositeParser

[grammar]
grammar M;
import S;
s : label=a[3] {<writeln("$label.y")>} ;
B : 'b' ; // defines B from inherited token space
WS : (' '|'\n') -> skip ;

[slaveGrammar]
parser grammar S;
a[int x] returns [int y] : B {<write("\"S.a\"")>} {$y=1000;} ;

[start]
s

[input]
b

[output]
"""S.a1000
"""