Compilling error

[rsuzano]

Hi, fist of all, thx for your lib!

I can't build my sketch because of these errors, I'm using PlatformIO, but I've tested ArduinoIDE and received diferent erro on the same file and line of code:

PlatformIO
Executing task in folder Nykko_Brat_rsuzano: platformio run --target upload

Processing esp32dev (platform: espressif32; board: esp32dev; framework: arduino)

Verbose mode can be enabled via -v, --verbose option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/esp32dev.html
PLATFORM: Espressif 32 (5.2.0) > Espressif ESP32 Dev Module
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:

• framework-arduinoespressif32 @ 3.20005.220925 (2.0.5)
• tool-esptoolpy @ 1.40201.0 (4.2.1)
• tool-mkfatfs @ 2.0.1
• tool-mklittlefs @ 1.203.210628 (2.3)
• tool-mkspiffs @ 2.230.0 (2.30)
• toolchain-xtensa-esp32 @ 8.4.0+2021r2-patch3
  LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
  LDF Modes: Finder ~ chain, Compatibility ~ soft
  Found 37 compatible libraries
  Scanning dependencies...
  Dependency Graph
  |-- DabbleESP32 @ 1.5.1
  |-- PWMMotorControl @ 2.1.0
  |-- ESP32 AnalogWrite @ 0.2.0
  |-- ServoESP32 @ 1.1.1
  |-- Preferences @ 2.0.0
  Building in release mode
  Compiling .pio/build/esp32dev/src/main.cpp.o
  In file included from src/main.h:5,
  from src/main.cpp:1:
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:68:81: error: call to non-'constexpr' function 'const _Tp& std::min(const _Tp&, const _Tp&) [with _Tp = int]'
  static const int TIMER_RESOLUTION = std::min(16, SOC_LEDC_TIMER_BIT_WIDE_NUM);
  ^
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h: In member function 'T ServoTemplate::mapTemplate(T, T, T, T, T) const':
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:256:12: warning: 'if constexpr' only available with -std=c++17 or -std=gnu++17
  if constexpr (std::is_floating_point_v) {
  ^~~~~~~~~
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:256:28: error: 'is_floating_point_v' is not a member of 'std'
  if constexpr (std::is_floating_point_v) {
  ^~~~~~~~~~~~~~~~~~~
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:256:28: note: suggested alternative: 'is_floating_point'
  if constexpr (std::is_floating_point_v) {
  ^~~~~~~~~~~~~~~~~~~
  is_floating_point
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:256:49: error: expected primary-expression before '>' token
  if constexpr (std::is_floating_point_v) {
  ^
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:256:50: error: expected primary-expression before ')' token
  if constexpr (std::is_floating_point_v) {
  ^
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h: In member function 'T ServoTemplate::mapTemplate(T, T, T, T, T) const [with T = int]':
  .pio/libdeps/esp32dev/ServoESP32/src/Servo.h:262:5: warning: control reaches end of non-void function [-Wreturn-type]

ArduinoIDE
In file included from /home/rsuzano/Arduino/libraries/ServoESP32/examples/01-SimpleServo/01-SimpleServo.ino:1:0:
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h:68:54: error: 'SOC_LEDC_TIMER_BIT_WIDE_NUM' was not declared in this scope
static const int TIMER_RESOLUTION = std::min(16, SOC_LEDC_TIMER_BIT_WIDE_NUM);
^
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h: In member function 'bool ServoTemplate::attach(int, int, T, T, int, int, int)':
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h:52:24: error: 'SOC_LEDC_CHANNEL_NUM' was not declared in this scope
#define LEDC_CHANNELS (SOC_LEDC_CHANNEL_NUM)
^
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h:132:38: note: in expansion of macro 'LEDC_CHANNELS'
if (channel_next_free == LEDC_CHANNELS) {
^
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h: In member function 'T ServoTemplate::mapTemplate(T, T, T, T, T) const':
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h:256:12: error: expected '(' before 'constexpr'
if constexpr (std::is_floating_point_v) {
^
/home/rsuzano/Arduino/libraries/ServoESP32/src/Servo.h:258:11: error: 'else' without a previous 'if'
} else {

[JarekParal]

Hi @rsuzano, I think you have same problem as we discussed in #26. Could you please check this comment and try to use the proposed solution (until I will be able to provide final solution in next library release): #26 (comment)

Let me please know, if that would solve your issue.

[rsuzano]

Hi, sorry for not find the issue #26 before open this. I'll try that solution.
Thanks