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Build cleanly under c++14

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Other parts of TinyConsole require >= c++ 14, but this forces c++17.

That's not necessarily a problem, but it triggered some build warnings for me,
so in case that's unintentional I'm sending this diff.

Exact warning:
```
Compiling .pio/build/esp32dev/lib4a7/TinyMqtt/TinyMqtt.cpp.o
.pio/libdeps/esp32dev/TinyMqtt/src/TinyMqtt.cpp: In member function 'MqttError MqttBroker::subscribe(MqttClient*, const Topic&, uint8_t)':
.pio/libdeps/esp32dev/TinyMqtt/src/TinyMqtt.cpp:221:13: warning: structured bindings only available with -std=c++17 or -std=gnu++17
   for(auto& [retained_topic, retain]: retained)
```

I personally just switched to c++17 as my fix/workaround.
This commit is contained in:
Richie Vos
2023-04-03 20:46:41 -07:00
committed by GitHub
parent ead3ae90e9
commit 14882fed22
1 changed files with 3 additions and 1 deletions
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4
src/TinyMqtt.cpp
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@@ -218,8 +218,10 @@ void MqttBroker::loop()
MqttError MqttBroker::subscribe(MqttClient* client, const Topic& topic, uint8_t qos)
{
debug("MqttBroker::subscribe to " << topic.str() << ", retained=" << retained.size() );
for(auto& [retained_topic, retain]: retained)
for(auto& retainItem: retained)
{
auto &retained_topic = retainItem.first;
auto &retain = retainItem.second;
debug(" retained: " << retained_topic.str());
if (topic.matches(retained_topic))
{