Default functions like print() about stitch HOT 3 CLOSED

So, right now print is set up to be 'psudo-polymorphic'. When the semantic analyzer checks a function call, if the call is named 'print', it handles it specially. If the type is an int, float, char or string, it passes it, otherwise it throws an exception.

In the generator, when it prints the call, if the call is to print, it manually inserts the correct printf statement.

Right now, this only works with ints. If you pull the current code, and run the test suite, the first four or five tests pass. When the suite gets to the 'hello world' test, it fails. I need to go in and add type-checking to the generator, to correctly format the printf statements, which shouldn't be too hard to do. Something similar can be done for other built-in's.

from stitch.

Now works for int, float, char, string and id. Still needs other exprs

from stitch.

Works for all other exprs. All tests up to and including ops1.stch work.

from stitch.