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, 2 insertions, 2 deletions

diff --git a/src/comp/pretty/pprust.rs b/src/comp/pretty/pprust.rs
index 7e0fb6cb7c9..ee11a43ad20 100644
--- a/src/comp/pretty/pprust.rs
+++ b/src/comp/pretty/pprust.rs
@@ -339,8 +339,8 @@ impure fn print_block(ps s, ast.block blk) {
         cur_line = st.span.hi.line;
         maybe_print_comment(s, st.span.lo);
         alt (st.node) {
-            case (ast.stmt_decl(?decl)) {print_decl(s, decl);}
-            case (ast.stmt_expr(?expr)) {print_expr(s, expr);}
+          case (ast.stmt_decl(?decl,_)) {print_decl(s, decl);}
+          case (ast.stmt_expr(?expr,_)) {print_expr(s, expr);}
         }
         if (front.parser.stmt_ends_with_semi(st)) {wrd(s.s, ";");}
         if (!maybe_print_line_comment(s, st.span)) {line(s.s);}