Tim Chevalier a9a1392b2c Instantiate function preconditions inside the function body
so that if we have a function like:
f(...) : p(x) {
  ...
}

p(x) is true inside the body of f.

Closes #694.
2011-07-21 16:11:34 -07:00
..
2011-07-16 19:56:12 -07:00