// Declare the functions
local function byValue(int iArg)
{
  writeln($catalog.system.out, "Inside \e iArg is " + iArg);
  iArg = 27;
  writeln($catalog.system.out, "Inside \e iArg now " + iArg);
}

local function byReference(any iArg)
{
  writeln($catalog.system.out, "Inside \e iArg is " + iArg);
  iArg = 27;
  writeln($catalog.system.out, "Inside \e iArg now " + iArg);
}

int iArg = 32;

call byValue(iArg);
writeln($catalog.system.out, "After returning iArg is still " + iArg);

call byReference(iArg);
writeln($catalog.system.out, "After returning iArg has become " + iArg);

// Note - only value types support the value/reference option. Container
// types are always passed by reference, as shown here, so it is clearer
// to always use "any"

local function container(smap m, set s)
{
  // Change the map by adding something
  string m.c = "Ice cream added by function \e";

  // Try removing something from the set
  s -= 3;
}

smap m;
int m.i = 99;

set s = (1,2,3,4);

writeln($catalog.system.out, "Initially m is " + m);
writeln($catalog.system.out, "and s is " + s);

call container(m, s);

writeln($catalog.system.out, "m now looks like " + m);
writeln($catalog.system.out, "s now looks like " + s);