Rewrite comp/middle/resolve.rs

 * Cleans up the algorithm
 * Move first pass to walk (second still folds)
 * Support part of a type/value namespace split
   (crate metadata and module indices still need to be taught about this)
 * Remove a few blatant inefficiencies (import tables being recreated for
   every lookup, most importantly)

3 files changed, 4 insertions, 3 deletions

diff --git a/src/test/compile-fail/export-import.rs b/src/test/compile-fail/export-import.rs
index cfa27af3..85125087 100644
--- a/src/test/compile-fail/export-import.rs
+++ b/src/test/compile-fail/export-import.rs
@@ -1,5 +1,6 @@
 // xfail-boot
-// error-pattern: unresolved name
+// xfail-stage0
+// error-pattern: unresolved import
 
 import m.unexported;
 
diff --git a/src/test/compile-fail/import.rs b/src/test/compile-fail/import.rs
index db1eac5c..ee04def6 100644
--- a/src/test/compile-fail/import.rs
+++ b/src/test/compile-fail/import.rs
@@ -1,5 +1,5 @@
 // xfail-boot
-// error-pattern: unresolved name: baz
+// error-pattern: unresolved import: baz
 import zed.bar;
 import zed.baz;
 mod zed {
diff --git a/src/test/compile-fail/import2.rs b/src/test/compile-fail/import2.rs
index 91d2ade3..5a536193 100644
--- a/src/test/compile-fail/import2.rs
+++ b/src/test/compile-fail/import2.rs
@@ -1,5 +1,5 @@
 // xfail-boot
-// error-pattern: unresolved name: zed
+// error-pattern: unresolved name
 import baz.zed.bar;
 mod baz {
 }