Set Visual Studio Intellisense C++ Version

Development Platforms
1

Hi, I’m using Visual Studio for IDE with this guide: Visual Studio — PlatformIO latest documentation

I’d like to use C++17, and already have my platform.ini setup to do so, but I’m unable to find a way to get Visual Studio’s intellisense to switch to C++17 mode. I’ve tried adding /std:c++17 to project properties → nmake → additional options, but that didn’t do anything. Anyone have any ideas?

2

First and foremost you have to tell PlatformIO what C++ version you want to use.

Depending on the currenty used compiler, it might be C++17 capable or not. We need to see your whole platformio.ini first in order to help.

Then the changes done in the platformio.ini should carry over into Visual Studio.

3

Hi, thanks for chiming in. Here’s my platformio.ini:

; PlatformIO Project Configuration File

;

;   Build options: build flags, source filter

;   Upload options: custom upload port, speed and extra flags

;   Library options: dependencies, extra library storages

;   Advanced options: extra scripting

;

; Please visit documentation for the other options and examples

; https://docs.platformio.org/page/projectconf.html

[env:nodemcuv2]

platform = espressif8266

board = nodemcuv2

framework = arduino

lib_deps = arkhipenko/TaskScheduler@^3.4.0

build_flags = -std=c++17

build_unflags = -std=c++11

[platformio]
4

This is not necessary in the latest Arduino core version 3.2.0, it already uses -std=gnu++17. You should remove it.

Visual Studio intellisense does not work properly per Visual Studio — PlatformIO latest documentation. However, the code still compiles when using C++17 features.

I’ve opened issue Visual Studio IntelliSense does not recognize basic using std::xyz statements · Issue #4097 · platformio/platformio-core · GitHub in regards to this.