Avoid unnecessary internings.

Most involving `Symbol::intern` on string literals.

4 files changed, 11 insertions, 11 deletions

diff --git a/src/libsyntax_ext/deriving/cmp/eq.rs b/src/libsyntax_ext/deriving/cmp/eq.rs
index a1035ff641f..e7d7f136e18 100644
--- a/src/libsyntax_ext/deriving/cmp/eq.rs
+++ b/src/libsyntax_ext/deriving/cmp/eq.rs
@@ -6,7 +6,7 @@ use syntax::ast::{self, Expr, MetaItem, GenericArg};
 use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ext::build::AstBuilder;
 use syntax::ptr::P;
-use syntax::symbol::Symbol;
+use syntax::symbol::sym;
 use syntax_pos::Span;
 
 pub fn expand_deriving_eq(cx: &mut ExtCtxt<'_>,
@@ -14,9 +14,9 @@ pub fn expand_deriving_eq(cx: &mut ExtCtxt<'_>,
                           mitem: &MetaItem,
                           item: &Annotatable,
                           push: &mut dyn FnMut(Annotatable)) {
-    let inline = cx.meta_word(span, Symbol::intern("inline"));
-    let hidden = cx.meta_list_item_word(span, Symbol::intern("hidden"));
-    let doc = cx.meta_list(span, Symbol::intern("doc"), vec![hidden]);
+    let inline = cx.meta_word(span, sym::inline);
+    let hidden = cx.meta_list_item_word(span, sym::hidden);
+    let doc = cx.meta_list(span, sym::doc, vec![hidden]);
     let attrs = vec![cx.attribute(span, inline), cx.attribute(span, doc)];
     let trait_def = TraitDef {
         span,
diff --git a/src/libsyntax_ext/deriving/cmp/ord.rs b/src/libsyntax_ext/deriving/cmp/ord.rs
index e4f939c151f..282cfa5a4bf 100644
--- a/src/libsyntax_ext/deriving/cmp/ord.rs
+++ b/src/libsyntax_ext/deriving/cmp/ord.rs
@@ -6,7 +6,7 @@ use syntax::ast::{self, Expr, MetaItem};
 use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ext::build::AstBuilder;
 use syntax::ptr::P;
-use syntax::symbol::Symbol;
+use syntax::symbol::sym;
 use syntax_pos::Span;
 
 pub fn expand_deriving_ord(cx: &mut ExtCtxt<'_>,
@@ -14,7 +14,7 @@ pub fn expand_deriving_ord(cx: &mut ExtCtxt<'_>,
                            mitem: &MetaItem,
                            item: &Annotatable,
                            push: &mut dyn FnMut(Annotatable)) {
-    let inline = cx.meta_word(span, Symbol::intern("inline"));
+    let inline = cx.meta_word(span, sym::inline);
     let attrs = vec![cx.attribute(span, inline)];
     let trait_def = TraitDef {
         span,
diff --git a/src/libsyntax_ext/deriving/cmp/partial_eq.rs b/src/libsyntax_ext/deriving/cmp/partial_eq.rs
index 07026ae3739..6172f27261e 100644
--- a/src/libsyntax_ext/deriving/cmp/partial_eq.rs
+++ b/src/libsyntax_ext/deriving/cmp/partial_eq.rs
@@ -6,7 +6,7 @@ use syntax::ast::{BinOpKind, Expr, MetaItem};
 use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ext::build::AstBuilder;
 use syntax::ptr::P;
-use syntax::symbol::Symbol;
+use syntax::symbol::sym;
 use syntax_pos::Span;
 
 pub fn expand_deriving_partial_eq(cx: &mut ExtCtxt<'_>,
@@ -62,7 +62,7 @@ pub fn expand_deriving_partial_eq(cx: &mut ExtCtxt<'_>,
 
     macro_rules! md {
         ($name:expr, $f:ident) => { {
-            let inline = cx.meta_word(span, Symbol::intern("inline"));
+            let inline = cx.meta_word(span, sym::inline);
             let attrs = vec![cx.attribute(span, inline)];
             MethodDef {
                 name: $name,
diff --git a/src/libsyntax_ext/deriving/cmp/partial_ord.rs b/src/libsyntax_ext/deriving/cmp/partial_ord.rs
index e99abeb118e..abfa79c2b4d 100644
--- a/src/libsyntax_ext/deriving/cmp/partial_ord.rs
+++ b/src/libsyntax_ext/deriving/cmp/partial_ord.rs
@@ -8,7 +8,7 @@ use syntax::ast::{self, BinOpKind, Expr, MetaItem};
 use syntax::ext::base::{Annotatable, ExtCtxt};
 use syntax::ext::build::AstBuilder;
 use syntax::ptr::P;
-use syntax::symbol::Symbol;
+use syntax::symbol::sym;
 use syntax_pos::Span;
 
 pub fn expand_deriving_partial_ord(cx: &mut ExtCtxt<'_>,
@@ -18,7 +18,7 @@ pub fn expand_deriving_partial_ord(cx: &mut ExtCtxt<'_>,
                                    push: &mut dyn FnMut(Annotatable)) {
     macro_rules! md {
         ($name:expr, $op:expr, $equal:expr) => { {
-            let inline = cx.meta_word(span, Symbol::intern("inline"));
+            let inline = cx.meta_word(span, sym::inline);
             let attrs = vec![cx.attribute(span, inline)];
             MethodDef {
                 name: $name,
@@ -42,7 +42,7 @@ pub fn expand_deriving_partial_ord(cx: &mut ExtCtxt<'_>,
                                     vec![Box::new(ordering_ty)],
                                     PathKind::Std));
 
-    let inline = cx.meta_word(span, Symbol::intern("inline"));
+    let inline = cx.meta_word(span, sym::inline);
     let attrs = vec![cx.attribute(span, inline)];
 
     let partial_cmp_def = MethodDef {