Tuple progress

Made some terrific progress today on tuples. Here's the complete unit test so far:

import tart.reflect.Module;

import tart.testing.TestUtils;

@EntryPoint

def main(args:String[]) -> int {

  return TestUtils.runModuleTests(Module.thisModule());

}

def testTupleCreate() {

  var a = 1, 2;

  Debug.assertEq(1, a[0]);

  Debug.assertEq(2, a[1]);

}

def testTupleCreate2() {

  var a = 1, "Hello";

  Debug.assertEq(1, a[0]);

  Debug.assertEq("Hello", a[1]);

}

def testTupleCreateExplicitType() {

  var a:(int, int) = 1, 2;

  Debug.assertEq(1, a[0]);

  Debug.assertEq(2, a[1]);

}

def testTupleAssign() {

  var a = 1, 2;

  var b = a;

  Debug.assertEq(1, b[0]);

  Debug.assertEq(2, a[1]);

}

def testTupleReturn() {

  var a = returnTuple();

  Debug.assertEq(3, a[0]);

  Debug.assertEq("Hello", a[1]);

}

def returnTuple() -> (int, String) {

  return 3, "Hello";

}

Still to do:

-- Test passing tuples as parameters.

-- Test member-wise conversions.

-- Test tuples as members of structs / classes.

-- Write a compilation failure test to insure tuple immutability.

-- Implement unpacking assignment.

I'm really looking forward to being able to write:

   for key, value in map {

     // Do stuff

   }

As opposed to Java style:

   for (Map.Entry<KeyType, ValueType> entry : map) {

     KeyType key = entry.getKey();

     ValueType value = entry.getValue();

     // Do stuff

   }

The former is so much nicer in my opinioin.