import com.sun.tools.javac.comp.Resolve.MethodResolutionDiagHelper.DiagnosticRewriter; //导入依赖的package包/类
@Override
JCDiagnostic getDiagnostic(JCDiagnostic.DiagnosticType dkind,
        DiagnosticPosition pos,
        Symbol location,
        Type site,
        Name name,
        List<Type> argtypes,
        List<Type> typeargtypes) {
    if (name == names.error)
        return null;

    if (syms.operatorNames.contains(name)) {
        boolean isUnaryOp = argtypes.size() == 1;
        String key = argtypes.size() == 1 ?
            "operator.cant.be.applied" :
            "operator.cant.be.applied.1";
        Type first = argtypes.head;
        Type second = !isUnaryOp ? argtypes.tail.head : null;
        return diags.create(dkind, log.currentSource(), pos,
                key, name, first, second);
    }
    else {
        Pair<Symbol, JCDiagnostic> c = errCandidate();
        if (compactMethodDiags) {
            for (Map.Entry<Template, DiagnosticRewriter> _entry :
                    MethodResolutionDiagHelper.rewriters.entrySet()) {
                if (_entry.getKey().matches(c.snd)) {
                    JCDiagnostic simpleDiag =
                            _entry.getValue().rewriteDiagnostic(diags, pos,
                                log.currentSource(), dkind, c.snd);
                    simpleDiag.setFlag(DiagnosticFlag.COMPRESSED);
                    return simpleDiag;
                }
            }
        }
        Symbol ws = c.fst.asMemberOf(site, types);
        return diags.create(dkind, log.currentSource(), pos,
                  "cant.apply.symbol",
                  kindName(ws),
                  ws.name == names.init ? ws.owner.name : ws.name,
                  methodArguments(ws.type.getParameterTypes()),
                  methodArguments(argtypes),
                  kindName(ws.owner),
                  ws.owner.type,
                  c.snd);
    }
}