stdlib: Use spans for #fmt errors originating in std

Issue #444

1 files changed, 7 insertions, 1 deletions

diff --git a/src/comp/front/extfmt.rs b/src/comp/front/extfmt.rs
index 1856b81ce58..c3d4fffcbab 100644
--- a/src/comp/front/extfmt.rs
+++ b/src/comp/front/extfmt.rs
@@ -28,11 +28,17 @@ fn expand_syntax_ext(&ext_ctxt cx,
     }
 
     auto fmt = expr_to_str(cx, args.(0));
+    auto fmtspan = args.(0).span;
 
     log "Format string:";
     log fmt;
 
-    auto pieces = parse_fmt_string(fmt);
+    fn parse_fmt_err_(&ext_ctxt cx, common::span sp, str msg) -> ! {
+        cx.span_err(sp, msg);
+    }
+
+    auto parse_fmt_err = bind parse_fmt_err_(cx, fmtspan, _);
+    auto pieces = parse_fmt_string(fmt, parse_fmt_err);
     auto args_len = vec::len[@ast::expr](args);
     auto fmt_args = vec::slice[@ast::expr](args, 1u, args_len - 1u);
     ret pieces_to_expr(cx, sp, pieces, args);