Use `Lit` rather than `P<Lit>` in `ast::ExprKind`.

Because it results in fewer allocations and small speedups on some
benchmarks.

3 files changed, 4 insertions, 4 deletions

diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 1701c8da2c5..88ee80e6088 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -491,7 +491,7 @@ impl DummyResult {
     pub fn raw_expr(sp: Span) -> P<ast::Expr> {
         P(ast::Expr {
             id: ast::DUMMY_NODE_ID,
-            node: ast::ExprKind::Lit(P(source_map::respan(sp, ast::LitKind::Bool(false)))),
+            node: ast::ExprKind::Lit(source_map::respan(sp, ast::LitKind::Bool(false))),
             span: sp,
             attrs: ThinVec::new(),
         })
diff --git a/src/libsyntax/ext/build.rs b/src/libsyntax/ext/build.rs
index 7928ec1606b..cacec867cf1 100644
--- a/src/libsyntax/ext/build.rs
+++ b/src/libsyntax/ext/build.rs
@@ -695,7 +695,7 @@ impl<'a> AstBuilder for ExtCtxt<'a> {
     }
 
     fn expr_lit(&self, sp: Span, lit: ast::LitKind) -> P<ast::Expr> {
-        self.expr(sp, ast::ExprKind::Lit(P(respan(sp, lit))))
+        self.expr(sp, ast::ExprKind::Lit(respan(sp, lit)))
     }
     fn expr_usize(&self, span: Span, i: usize) -> P<ast::Expr> {
         self.expr_lit(span, ast::LitKind::Int(i as u128,
diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index 62bc9fae3b5..ebc618a4c3c 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -274,7 +274,7 @@ pub mod rt {
             // FIXME: This is wrong
             P(ast::Expr {
                 id: ast::DUMMY_NODE_ID,
-                node: ast::ExprKind::Lit(P(self.clone())),
+                node: ast::ExprKind::Lit(self.clone()),
                 span: DUMMY_SP,
                 attrs: ThinVec::new(),
             }).to_tokens(cx)
@@ -305,7 +305,7 @@ pub mod rt {
                     let lit = ast::LitKind::Int(val as u128, ast::LitIntType::Signed($tag));
                     let lit = P(ast::Expr {
                         id: ast::DUMMY_NODE_ID,
-                        node: ast::ExprKind::Lit(P(dummy_spanned(lit))),
+                        node: ast::ExprKind::Lit(dummy_spanned(lit)),
                         span: DUMMY_SP,
                         attrs: ThinVec::new(),
                     });