@Override public void compile(final QueryContext ctx) throws QueryException { if (compiled) return; compiled = true; if (check) { final StaticFunc sf = ctx.funcs.get(name, args.length, info); if (sf == null) throw Err.FUNCUNKNOWN.thrw(info, name.string()); type = sf.funcType().seqType(); } final int fp = scope.enter(ctx); try { expr = expr.compile(ctx, scope); expr.markTailCalls(); } finally { scope.cleanUp(this); scope.exit(ctx, fp); } }