Add the beginnings of an ast folder plus an empty module for resolve.

Author: graydon

src/comp/front/ast.rs

@@ -76,7 +76,7 @@ tag stmt_ {
 
 type decl = spanned[decl_];
 tag decl_ {
-    decl_local(ident, option[@ty], ty);
+    decl_local(ident, bool, option[@ty]);
     decl_item(name, @item);
 }
 
@@ -126,8 +126,9 @@ tag mode {
 }
 
 type slot = rec(@ty ty, mode mode, option[slot_id] id);
+type input = rec(slot slot, ident ident);
 
-type _fn = rec(vec[rec(slot slot, ident ident)] inputs,
+type _fn = rec(vec[input] inputs,
                slot output,
                block body);
 

src/comp/front/parser.rs

@@ -651,7 +651,7 @@ io fn parse_item(parser p) -> tup(ast.ident, @ast.item) {
     fail;
 }
 
-io fn parse_crate(parser p) -> ast.crate {
+io fn parse_crate(parser p) -> @ast.crate {
     auto lo = p.get_span();
     auto hi = lo;
     let ast._mod m = new_str_hash[@ast.item]();
@@ -660,7 +660,7 @@ io fn parse_crate(parser p) -> ast.crate {
         m.insert(i._0, i._1);
         hi = i._1.span;
     }
-    ret spanned(lo, hi, rec(module=m));
+    ret @spanned(lo, hi, rec(module=m));
 }
 
 //