PlatformIO Linter Error but then it compiles

[FrAxl93]

Good evening everyone,

I am running the several wi-fi examples for esp32 with platformIO on Atom (MAC). The so called "Linter" which from what I have understood is a sort of intellisense that seeks for errors in the code, tells me that I cannot do the following because "C99 designator is outside aggregate initializer":

Code: Select all

wifi_sta_config_t wifi_AP_conf = {.ssid = WIFI_SSID, .password = WIFI_PASS, };

	wifi_config_t wifi_config = {
        	.sta = wifi_AP_conf,
    };

But then the compiler magically ends with no error whatsoever. May anyone tell me what's happening?

Thanks a lot,
Regards.

[ESP_Angus]

This is a g++ compiler error, I'm surprised the compile still succeeds. Designated initializers of this kind are supported in C99 and newer (C language) but not fully supported in C++.

Here's some more discussion on the platform.io github.

You can either:

• Rewrite the code so that the string literals WIFI_SSID and WIFI_PASS are not passed in a designated initializer like this (ie write code like strlcpy(wifi_AP_conf.ssid, sWIFI_SSID, sizeof(wifi_AP_conf.ssid))).
• Move this code to a .c file instead of a .cpp file
• Find some C++ classes which wrap the WiFi support so you don't need to call the ESP-IDF C API. ESP-IDF does not include a C++ WiFi API, but Arduino does and I believe nkolban may have some as well.

[FrAxl93]

Thanks very much for your reply.

Although I will try all of your other suggestions, I think that the code was compiling because it was in the "main.c" file, but the "Linter" from PlatformIO still analyzed as it was C++ (I guess?).

Thanks a lot,
Regards, Francesco.

[ESP_Angus]

Hi Francesco,

Although I will try all of your other suggestions, I think that the code was compiling because it was in the "main.c" file, but the "Linter" from PlatformIO still analyzed as it was C++ (I guess?).

Ah, this seems likely! Maybe raise this as a bug with the platform.io folks?