From 4844e1c08a0f87f8c2bf4ba752630e1af0794a63 Mon Sep 17 00:00:00 2001
From: Brian Anderson <andersrb@gmail.com>
Date: Wed, 13 Apr 2011 20:14:59 -0400
Subject: Add support for printing uints as lower-case hex to ExtFmt.

Begin passing an ExtFmt.RT.conv parsed format description to each of the
ExtFmt.RT.conv* functions.
---
 src/lib/ExtFmt.rs | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

(limited to 'src/lib')

diff --git a/src/lib/ExtFmt.rs b/src/lib/ExtFmt.rs
index 35b9c5dd..229a0c5d 100644
--- a/src/lib/ExtFmt.rs
+++ b/src/lib/ExtFmt.rs
@@ -264,15 +264,32 @@ mod CT {
 
 // Functions used by the fmt extension at runtime
 mod RT {
-    fn conv_int(int i) -> str {
+
+    tag ty {
+        ty_default;
+        ty_bits;
+        ty_hex_upper;
+        ty_hex_lower;
+    }
+
+    type conv = rec(ty ty);
+
+    fn conv_int(&conv cv, int i) -> str {
         ret _int.to_str(i, 10u);
     }
 
-    fn conv_uint(uint u) -> str {
-        ret _uint.to_str(u, 10u);
+    fn conv_uint(&conv cv, uint u) -> str {
+        alt (cv.ty) {
+            case (ty_default) {
+                ret _uint.to_str(u, 10u);
+            }
+            case (ty_hex_lower) {
+                ret _uint.to_str(u, 16u);
+            }
+        }
     }
 
-    fn conv_bool(bool b) -> str {
+    fn conv_bool(&conv cv, bool b) -> str {
         if (b) {
             ret "true";
         } else {
@@ -280,7 +297,7 @@ mod RT {
         }
     }
 
-    fn conv_char(char c) -> str {
+    fn conv_char(&conv cv, char c) -> str {
         ret _str.from_char(c);
     }
 }
-- 
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