conversion from ‘ArduinoJson::V704HB42::detail::enable_if<true, ArduinoJson::V704HB42::JsonVariantConst>::type’ {aka ‘ArduinoJson::V704HB42::JsonVariantConst’} to ‘ArduinoJson::V704HB42::JsonDocument’ is ambiguous

[folkertvanheusden]

Description I've got:

class myobject {
public:
static myobject *deserialize(const JsonDocument j);
};

furthermore:

void wrapper(const JsonDocument j) {
    myobject *m = myobject::deserialize(j["myobject"]);
}

This results in the error shown in the topic:

error: conversion from ‘ArduinoJson::V704HB42::detail::enable_if<true, ArduinoJson::V704HB42::JsonVariantConst>::type’ {aka ‘ArduinoJson::V704HB42::JsonVariantConst’} to ‘ArduinoJson::V704HB42::JsonDocument’ is ambiguous

Troubleshooter's report

1. The program uses ArduinoJson 7
2. The issue happens at compile time
3. The error is not in the list

Environment

• Microcontroller: esp32 & x64
• Core/Framework: arduino & posix

[folkertvanheusden]

I learned that when loading, use JsonDocument and from then on use JsonVariant.