Merge branch 'feature/QPR-13699' into 'master'

QPR-13699: fix const and add example

Closes QPR-13699

See merge request qs/oreplus!3112

Author: farahkhashman

Examples/ORE-Python/ExampleScripts/ExpectedOutput/dates.txt

@@ -18,3 +18,7 @@ advance start date by 1M
 startDate 2020-05-01
 endDate   2020-06-01
 ---------------------------
+May 1st, 2020
+May 6th, 2020
+May 11th, 2020
+2025-12-24

Examples/ORE-Python/ExampleScripts/dates.py

@@ -46,3 +46,13 @@
 print("startDate", startDate.to_date())
 print("endDate  ", endDate.to_date())
 print('---------------------------')
+
+mporDays = 3
+
+print(startDate)
+#print(ore.calculateMporDate(mporDays))
+print(ore.calculateMporDate(mporDays, startDate))
+print(ore.calculateMporDate(mporDays, startDate, calendarString))
+
+print(ore.calculateMporDate(mporDays).to_date())
+      

ORE-SWIG/OREData-SWIG/SWIG/ored_parsers.i

@@ -104,7 +104,7 @@ QuantLib::Settlement::Type parseSettlementType(const std::string& s);
 QuantLib::Exercise::Type parseExerciseType(const std::string& s);
 QuantLib::Option::Type parseOptionType(const std::string& s);
 QuantLib::Date parseDate(const std::string& s);
-QuantLib::Date calculateMporDate(QuantLib::Size& mporDays, QuantLib::Date asOf = QuantLib::Date(), std::string mporCalendar = "US");
+QuantLib::Date calculateMporDate(const QuantLib::Size& mporDays, QuantLib::Date asOf = QuantLib::Date(), std::string mporCalendar = "US");
 
 %template(StringCalMap) std::map<std::string, Calendar>;
 

OREData/ored/utilities/parsers.cpp

@@ -472,7 +472,7 @@ Settlement::Method parseSettlementMethod(const std::string& s) {
     }
 }
 
-QuantLib::Date calculateMporDate(QuantLib::Size& mporDays, QuantLib::Date asOf, std::string mporCalendar) {
+QuantLib::Date calculateMporDate(const QuantLib::Size& mporDays, QuantLib::Date asOf, std::string mporCalendar) {
     QuantLib::Calendar mporCal = parseCalendar(mporCalendar);
     if (asOf == Date())
         asOf = Settings::instance().evaluationDate();

OREData/ored/utilities/parsers.hpp

@@ -615,7 +615,7 @@ MporCashFlowMode parseMporCashFlowMode(const std::string& s);
 /*!
 \ingroup utilities
 */
-QuantLib::Date calculateMporDate(QuantLib::Size& mporDays, QuantLib::Date asOf = QuantLib::Date(),
+QuantLib::Date calculateMporDate(const QuantLib::Size& mporDays, QuantLib::Date asOf = QuantLib::Date(),
                                  std::string mporCalendar = "US");
 
 //! Write MporCashFlowMode to stream