From 49568d7f76226aac5f7a641848a2251618079230 Mon Sep 17 00:00:00 2001
From: topecongiro <seuchida@gmail.com>
Date: Thu, 20 Dec 2018 01:14:14 +0900
Subject: [PATCH] Do not modify original source code inside macro call

---
 src/closures.rs | 3 ++-
 src/types.rs    | 8 +++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/closures.rs b/src/closures.rs
index e29a412a515..008b884bcb2 100644
--- a/src/closures.rs
+++ b/src/closures.rs
@@ -59,7 +59,7 @@ pub fn rewrite_closure(
         }
 
         let result = match fn_decl.output {
-            ast::FunctionRetTy::Default(_) => {
+            ast::FunctionRetTy::Default(_) if !context.inside_macro() => {
                 try_rewrite_without_block(body, &prefix, context, shape, body_shape)
             }
             _ => None,
@@ -306,6 +306,7 @@ pub fn rewrite_last_closure(
         let body = match body.node {
             ast::ExprKind::Block(ref block, _)
                 if !is_unsafe_block(block)
+                    && !context.inside_macro()
                     && is_simple_block(block, Some(&body.attrs), context.source_map) =>
             {
                 stmt_expr(&block.stmts[0]).unwrap_or(body)
diff --git a/src/types.rs b/src/types.rs
index d27d1f13f98..8cfba778a48 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -583,7 +583,13 @@ impl Rewrite for ast::Ty {
                 let is_dyn = tobj_syntax == ast::TraitObjectSyntax::Dyn;
                 // 4 is length of 'dyn '
                 let shape = if is_dyn { shape.offset_left(4)? } else { shape };
-                let res = bounds.rewrite(context, shape)?;
+                let mut res = bounds.rewrite(context, shape)?;
+                // We may have falsely removed a trailing `+` inside macro call.
+                if context.inside_macro() && bounds.len() == 1 {
+                    if context.snippet(self.span).ends_with('+') && !res.ends_with('+') {
+                        res.push('+');
+                    }
+                }
                 if is_dyn {
                     Some(format!("dyn {}", res))
                 } else {