while (interpreter.isCanIterate() && !xPC_ConditionX(myClosure, cnode)) {
_clear_closure_(myClosure);
rnode = enode.exec(true);
if (rnode != null) xnode.addElement(rnode.secure());
}
global.pull();
}
else {
// erreur de syntaxe.
throw new InterpreterException(StdErrors.Syntax_error);