Continued sketching out code for checking states against preconditions.

It's still sketchy. I added a typestate annotation field to statements
tagged stmt_decl or stmt_expr, because a stmt_decl statement has a typestate
that's different from that of its child node. This necessitated trivial
changes to a bunch of other files all over to the compiler. I also added a
few small standard library functions, some of which I didn't actually end
up using but which I thought might be useful anyway.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/comp/front/ast.rs b/src/comp/front/ast.rs
index d41e6d60686..cf4145a5598 100644
--- a/src/comp/front/ast.rs
+++ b/src/comp/front/ast.rs
@@ -215,8 +215,8 @@ tag mode {
 
 type stmt = spanned[stmt_];
 tag stmt_ {
-    stmt_decl(@decl);
-    stmt_expr(@expr);
+    stmt_decl(@decl, option.t[@ts_ann]);
+    stmt_expr(@expr, option.t[@ts_ann]);
     // These only exist in crate-level blocks.
     stmt_crate_directive(@crate_directive);
 }
@@ -495,7 +495,7 @@ fn index_native_view_item(native_mod_index index, @view_item it) {
 
 fn index_stmt(block_index index, @stmt s) {
     alt (s.node) {
-        case (ast.stmt_decl(?d)) {
+        case (ast.stmt_decl(?d,_)) {
             alt (d.node) {
                 case (ast.decl_local(?loc)) {
                     index.insert(loc.ident, ast.bie_local(loc));