23 lines
1.1 KiB
MQL5
23 lines
1.1 KiB
MQL5
//+------------------------------------------------------------------+
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//| PRTF.mqh |
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//| Copyright 2021, MetaQuotes Ltd. |
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//| https://forge.mql5.io |
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//+------------------------------------------------------------------+
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#include <MQL5Book/MqlError.mqh>
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#define PRTF(A) ResultPrint(#A, (A))
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//+------------------------------------------------------------------+
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//| Helper printer returning result and checking errors |
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//+------------------------------------------------------------------+
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template<typename T>
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T ResultPrint(const string s, const T retval = NULL)
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{
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const int snapshot = _LastError; // required because _LastError is volatile
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const string err = E2S(snapshot) + "(" + (string)snapshot + ")";
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Print(s, "=", retval, " / ", (snapshot == 0 ? "ok" : err));
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ResetLastError(); // cleanup for next execution
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return retval;
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}
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//+------------------------------------------------------------------+
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