OnDeinit Reason

Artyom Trishkin:

The post was like this:

So I was wondering how this line will help in finding the desired enumeration. I didn’t understand for example.

checked, will help:

void OnStart()
  {
   enum ENUM_MY{help,help_me,go_away};
   Print(typename(PERIOD_H1));
   Print(typename(help_me));
  }

2019.08.03 15:48:46.362 tst (EURUSD,H1) ENUM_TIMEFRAMES

2019.08.03 15:48:46.362 tst (EURUSD,H1) ENUM_MY

Artem confused, in General, the meaning of the explanations was that the reasons for deinitialization are not an enumeration, but they are constants, and
constants specified via the macro substitution #define, so the example Print(typename(REASON_CLOSE)); and returns the type int

PS: then the help is a little misleading – my previous post

fxsaber:

OK, thank you

there was a suspicion that there was enough red in the ME for #define –
it turns out that you need to check through #ifdef

PS: I recently asked myself a question, in MT4 TRUE works, and in MT5 there will be an error you need to write true, although ME that there that there will highlight TRUE in red, so
I could not understand how these constants are obtained in MQL

judging by the function signature void OnDeinit(const int reason) – these are constants, not an enumeration, in the help, as you noticed, also not
links or specify the name of the enumeration 

if you want to see the reason for deinitialization in text form
, I would try to do this:

enum ENUM_REASON{REASON__PROGRAM,REASON__REMOVE,REASON__RECOMPILE,REASON__CHARTCHANGE,REASON__CHARTCLOSE,REASON__PARAMETERS,REASON__ACCOUNT,REASON__TEMPLATE,REASON__INITFAILED,REASON__CLOSE};

void OnDeinit(const int reason)
  {
   Print(EnumToString((ENUM_REASON)reason));
  }

that is, I created a custom enumeration with a list of values similar in name (added an additional sign _ )