From 84b8f318a54e32f8bce0db0759bdcd3c562b97b3 Mon Sep 17 00:00:00 2001
From: Sean McArthur <sean.monstar@gmail.com>
Date: Sat, 20 Dec 2014 00:32:07 -0800
Subject: [PATCH] add {:?} fmt syntax

---
 src/libsyntax/ext/format.rs | 1 +
 src/test/run-pass/ifmt.rs   | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/libsyntax/ext/format.rs b/src/libsyntax/ext/format.rs
index 5d595474e9c70..95c7fcc564af8 100644
--- a/src/libsyntax/ext/format.rs
+++ b/src/libsyntax/ext/format.rs
@@ -654,6 +654,7 @@ impl<'a, 'b> Context<'a, 'b> {
             Known(ref tyname) => {
                 match tyname.as_slice() {
                     ""  => "Show",
+                    "?" => "Show",
                     "e" => "LowerExp",
                     "E" => "UpperExp",
                     "o" => "Octal",
diff --git a/src/test/run-pass/ifmt.rs b/src/test/run-pass/ifmt.rs
index 9eac9c30dc8f7..f3e15562b6dc9 100644
--- a/src/test/run-pass/ifmt.rs
+++ b/src/test/run-pass/ifmt.rs
@@ -60,6 +60,7 @@ pub fn main() {
     t!(format!("{}", 10i), "10");
     t!(format!("{}", 10i), "10");
     t!(format!("{}", 10u), "10");
+    t!(format!("{:?}", true), "true");
     t!(format!("{:o}", 10u), "12");
     t!(format!("{:x}", 10u), "a");
     t!(format!("{:X}", 10u), "A");