Rewrite session formatting to use #fmt extension.

1 files changed, 7 insertions, 19 deletions

diff --git a/src/comp/driver/session.rs b/src/comp/driver/session.rs
index 228e864faaf..831c643929f 100644
--- a/src/comp/driver/session.rs
+++ b/src/comp/driver/session.rs
@@ -3,33 +3,21 @@ import std._uint;
 
 obj session() {
     fn span_err(span sp, str msg) {
-        let str s =  sp.filename;
-        s += ':' as u8;
-        // We really need #fmt soon!
-        s += _uint.to_str(sp.lo.line, 10u);
-        s += ':' as u8;
-        s += _uint.to_str(sp.lo.col, 10u);
-        s += ':' as u8;
-        s += _uint.to_str(sp.hi.line, 10u);
-        s += ':' as u8;
-        s += _uint.to_str(sp.hi.col, 10u);
-        s += ": error: ";
-        s += msg;
-        log s;
+        log #fmt("%s:%u:%u:%u:%u: error: %s",
+                 sp.filename,
+                 sp.lo.line, sp.lo.col,
+                 sp.hi.line, sp.hi.col,
+                 msg);
         fail;
     }
 
     fn err(str msg) {
-        let str s = "error: ";
-        s += msg;
-        log s;
+        log #fmt("error: %s", msg);
         fail;
     }
 
     fn unimpl(str msg) {
-        let str s = "error: unimplemented ";
-        s += msg;
-        log s;
+        log #fmt("error: unimplemented %s", msg);
         fail;
     }
 }