Remove unnecessary allocations flagged by lint

3 files changed, 12 insertions, 12 deletions

diff --git a/src/libsyntax/ext/asm.rs b/src/libsyntax/ext/asm.rs
index 204eb9a9f8b..05ac87adcc5 100644
--- a/src/libsyntax/ext/asm.rs
+++ b/src/libsyntax/ext/asm.rs
@@ -114,7 +114,7 @@ pub fn expand_asm(cx: @ExtCtxt, sp: span, tts: &[ast::token_tree])
                         p.eat(&token::COMMA);
                     }
 
-                    let clob = ~"~{" + *p.parse_str() + ~"}";
+                    let clob = ~"~{" + *p.parse_str() + "}";
                     clobs.push(clob);
                 }
 
diff --git a/src/libsyntax/ext/fmt.rs b/src/libsyntax/ext/fmt.rs
index 987f7fc319a..2efed5780b4 100644
--- a/src/libsyntax/ext/fmt.rs
+++ b/src/libsyntax/ext/fmt.rs
@@ -158,15 +158,15 @@ fn pieces_to_expr(cx: @ExtCtxt, sp: span,
               FlagSignAlways => {
                 if !is_signed_type(cnv) {
                     cx.span_fatal(sp,
-                                  ~"+ flag only valid in " +
-                                      ~"signed fmt! conversion");
+                                  "+ flag only valid in \
+                                   signed fmt! conversion");
                 }
               }
               FlagSpaceForSign => {
                 if !is_signed_type(cnv) {
                     cx.span_fatal(sp,
-                                  ~"space flag only valid in " +
-                                      ~"signed fmt! conversions");
+                                  "space flag only valid in \
+                                   signed fmt! conversions");
                 }
               }
               FlagLeftZeroPad => (),
@@ -284,8 +284,8 @@ fn pieces_to_expr(cx: @ExtCtxt, sp: span,
                 n += 1u;
                 if n >= nargs {
                     cx.span_fatal(sp,
-                                  ~"not enough arguments to fmt! " +
-                                  ~"for the given format string");
+                                  "not enough arguments to fmt! \
+                                   for the given format string");
                 }
 
                 log_conv(conv);
diff --git a/src/libsyntax/ext/pipes/pipec.rs b/src/libsyntax/ext/pipes/pipec.rs
index 1a7b7e55ace..e55ecbc29bc 100644
--- a/src/libsyntax/ext/pipes/pipec.rs
+++ b/src/libsyntax/ext/pipes/pipec.rs
@@ -66,7 +66,7 @@ impl gen_send for message {
 
             let mut body = ~"{\n";
             body += fmt!("use super::%s;\n", name);
-            body += ~"let mut pipe = pipe;\n";
+            body += "let mut pipe = pipe;\n";
 
             if this.proto.is_bounded() {
                 let (sp, rp) = match (this.dir, next.dir) {
@@ -76,7 +76,7 @@ impl gen_send for message {
                   (recv, recv) => (~"c", ~"s")
                 };
 
-                body += ~"let mut b = pipe.reuse_buffer();\n";
+                body += "let mut b = pipe.reuse_buffer();\n";
                 body += fmt!("let %s = ::std::pipes::SendPacketBuffered(\
                               &mut (b.buffer.data.%s));\n",
                              sp, next.name);
@@ -103,7 +103,7 @@ impl gen_send for message {
             if !try {
                 body += fmt!("::std::pipes::send(pipe, message);\n");
                 // return the new channel
-                body += ~"c }";
+                body += "c }";
             }
             else {
                 body += fmt!("if ::std::pipes::send(pipe, message) {\n \
@@ -152,7 +152,7 @@ impl gen_send for message {
                 }
                 else {
                     ~"(" + str::connect(arg_names.map(|x| copy *x),
-                                        ", ") + ~")"
+                                        ", ") + ")"
                 };
 
                 let mut body = ~"{ ";
@@ -161,7 +161,7 @@ impl gen_send for message {
 
                 if !try {
                     body += fmt!("::std::pipes::send(pipe, message);\n");
-                    body += ~" }";
+                    body += " }";
                 } else {
                     body += fmt!("if ::std::pipes::send(pipe, message) \
                                         { \