From d719b5cae78eda4737250c2e223b73ff8bd9f68b Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijnh@gmail.com>
Date: Thu, 12 May 2011 09:17:59 +0200
Subject: Provide a more useful message when failing to translate a const

---
 src/comp/middle/trans.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index d9d520e2..ea8270e0 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -6694,6 +6694,9 @@ fn trans_const_expr(&@crate_ctxt cx, @ast.expr e) -> ValueRef {
         case (ast.expr_lit(?lit, ?ann)) {
             ret trans_lit(cx, *lit, ann);
         }
+        case (_) {
+            cx.sess.span_unimpl(e.span, "consts that's not a plain literal");
+        }
     }
 }
 
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