syntax: Pre-intern names of all built-in macros

They always end up interned anyway

2 files changed, 4 insertions, 4 deletions

diff --git a/src/libsyntax/ext/derive.rs b/src/libsyntax/ext/derive.rs
index 3b4243ed24f..2a56f3dd756 100644
--- a/src/libsyntax/ext/derive.rs
+++ b/src/libsyntax/ext/derive.rs
@@ -63,11 +63,11 @@ pub fn add_derived_markers<T>(cx: &mut ExtCtxt<'_>, span: Span, traits: &[ast::P
 
     let span = span.with_ctxt(cx.backtrace());
     item.visit_attrs(|attrs| {
-        if names.contains(&Symbol::intern("Eq")) && names.contains(&Symbol::intern("PartialEq")) {
-            let meta = cx.meta_word(span, Symbol::intern("structural_match"));
+        if names.contains(&sym::Eq) && names.contains(&sym::PartialEq) {
+            let meta = cx.meta_word(span, sym::structural_match);
             attrs.push(cx.attribute(span, meta));
         }
-        if names.contains(&Symbol::intern("Copy")) {
+        if names.contains(&sym::Copy) {
             let meta = cx.meta_word(span, sym::rustc_copy_clone_marker);
             attrs.push(cx.attribute(span, meta));
         }
diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index 1abbf0ff1ee..d0c4e8d6a56 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -613,7 +613,7 @@ impl<'a> StringReader<'a> {
         if num_digits == 0 {
             self.err_span_(start_bpos, self.pos, "no valid digits found for number");
 
-            return (token::Integer, Symbol::intern("0"));
+            return (token::Integer, sym::integer(0));
         }
 
         // might be a float, but don't be greedy if this is actually an