@Override
public Value value(final QueryContext ctx) throws QueryException {
Expr fun = func;
Var[] args = args(ctx);
do {
// cache arguments, evaluate function and reset variable scope
final VarStack cs = addArgs(ctx, args);
ctx.tailCalls = 0;
try {
return fun.value(ctx);
} catch (final Continuation c) {
fun = c.getFunc();
args = c.getArgs();
} finally {
ctx.vars.reset(cs);
}
} while (true);
}
