Started adding support for typestate checking.

I added a new field to the ast "ann" type for typestate information.
Currently, the field contains a record of a precondition bit vector and
postcondition vector, but I tried to structure things so as to make
it easy to change the representation of the typestate annotation type.
I also had to add annotations to some syntactic forms that didn't have
them before (fail, ret, be...), with all the boilerplate changes
that that would imply.

The main call to the typestate_check entry point is commented out and
the actual pre-postcondition algorithm only has a few cases
implemented, though the overall AST traversal is there. The rest of
the typestate algorithm isn't implemented yet.

1 files changed, 3 insertions, 2 deletions

diff --git a/src/comp/driver/rustc.rs b/src/comp/driver/rustc.rs
index 9ab21622..a1fdb387 100644
--- a/src/comp/driver/rustc.rs
+++ b/src/comp/driver/rustc.rs
@@ -8,6 +8,7 @@ import middle.trans;
 import middle.resolve;
 import middle.ty;
 import middle.typeck;
+import middle.typestate_check;
 import util.common;
 
 import std.map.mk_hashmap;
@@ -63,11 +64,11 @@ impure fn compile_input(session.session sess,
     auto crate = parse_input(sess, p, input);
     crate = creader.read_crates(sess, crate, library_search_paths);
     crate = resolve.resolve_crate(sess, crate);
-
     auto typeck_result = typeck.check_crate(sess, crate);
     crate = typeck_result._0;
     auto type_cache = typeck_result._1;
-
+    // FIXME: uncomment once typestate_check works
+    // crate = typestate_check.check_crate(crate);
     trans.trans_crate(sess, crate, type_cache, output, shared);
 }