Introduction

The idea is that comparing integers in C++ is easier and faster than comparing strings. So each model input is assigned an enum. In the code you will see IceVolumeAboveFloatationEnum but the code interpret this word as the integer 682. Each enum has a number associated to it automatically by the compiler. See this ​wikipedia page for more info.

Add a new Enum

If you want to add a new Enum, the ONLY file that needs to be changed is src/c/shared/Enum/EnumDefinitions.h. Open it with you favorite editor (vim) and add your new Enum. Make sure that:

• It does not already exist (the compiler will tell you anyway)
• It finishes with Enum,

Then you can run a synchronization script that will update the matlab and python Enum, StringToEnum and EnumToString automatically:

cd $ISSM_DIR/src/c/shared/Enum/
./Synchronize.sh

You will then need to recompile src/c only, and there is no need to reconfigure:

cd $ISSM_DIR/src/c
make install