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Serialize constraints in types (literal arguments still not supported)

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This involved, in part, changing the ast::def type so that a def_fn
has a "purity" field. This lets the typechecker determine whether
functions defined in other crates are pure.

It also required updating some error messages in tests. As a test
for cross-crate constrained functions, I added a safe_slice function
to std::str (slice(), with one of the asserts replaced with a
function precondition) and some test cases (various versions of
fn-constraint.rs) that call it. Also, I changed "fn" to "pred" for
some of the boolean functions in std::uint.
This commit is contained in:
Tim Chevalier 2011-06-20 17:29:54 -07:00
parent 3b6d94d489
commit 7fb35ecf84
15 changed files with 147 additions and 113 deletions
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2
src/comp/middle/tstate/auxiliary.rs
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@ -537,7 +537,7 @@ fn node_id_for_constr(ty::ctxt tcx, node_id t) -> node_id {
case (none) {
tcx.sess.bug("node_id_for_constr: bad node_id " + istr(t));
}
case (some(def_fn(?i))) { ret i._1; }
case (some(def_fn(?i,_))) { ret i._1; }
case (_) {
tcx.sess.bug("node_id_for_constr: pred is not a function");
}