From 6f65ce5255ac16204490bdd7dcf99acd24876bc6 Mon Sep 17 00:00:00 2001
From: Patrick Walton <pcwalton@mimiga.net>
Date: Fri, 18 Mar 2011 12:30:44 -0700
Subject: rustc: Add a span_unimpl() for debugging

---
 src/comp/driver/session.rs | 9 +++++++++
 src/comp/middle/typeck.rs  | 3 ++-
 2 files changed, 11 insertions(+), 1 deletion(-)

(limited to 'src/comp')

diff --git a/src/comp/driver/session.rs b/src/comp/driver/session.rs
index e23dbeed..605774fe 100644
--- a/src/comp/driver/session.rs
+++ b/src/comp/driver/session.rs
@@ -45,6 +45,15 @@ obj session(cfg targ) {
         fail;
     }
 
+    fn span_unimpl(span sp, str msg) {
+        log #fmt("%s:%u:%u:%u:%u: error: unimplemented %s",
+                 sp.filename,
+                 sp.lo.line, sp.lo.col,
+                 sp.hi.line, sp.hi.col,
+                 msg);
+        fail;
+    }
+
     fn unimpl(str msg) {
         log #fmt("error: unimplemented %s", msg);
         fail;
diff --git a/src/comp/middle/typeck.rs b/src/comp/middle/typeck.rs
index 5279b713..14d4f714 100644
--- a/src/comp/middle/typeck.rs
+++ b/src/comp/middle/typeck.rs
@@ -1402,7 +1402,8 @@ fn demand_expr_full(&@fn_ctxt fcx, @ty.t expected, @ast.expr e,
         }
 
         case (_) {
-            fcx.ccx.sess.unimpl("type unification for expression variant");
+            fcx.ccx.sess.span_unimpl(e.span,
+                "type unification for expression variant");
             fail;
         }
     }
-- 
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