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

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

5 files changed, 6 insertions, 6 deletions

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index cfedda18a7e..2f17bc0548c 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -1086,7 +1086,7 @@ pub enum ExprKind {
     /// A unary operation (For example: `!x`, `*x`)
     Unary(UnOp, P<Expr>),
     /// A literal (For example: `1`, `"foo"`)
-    Lit(P<Lit>),
+    Lit(Lit),
     /// A cast (`foo as f64`)
     Cast(P<Expr>, P<Ty>),
     Type(P<Expr>, P<Ty>),
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(),
                     });
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index c453b4b5597..ae5c936a70d 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -1957,7 +1957,7 @@ impl<'a> Parser<'a> {
         let minus_lo = self.span;
         let minus_present = self.eat(&token::BinOp(token::Minus));
         let lo = self.span;
-        let literal = P(self.parse_lit()?);
+        let literal = self.parse_lit()?;
         let hi = self.prev_span;
         let expr = self.mk_expr(lo.to(hi), ExprKind::Lit(literal), ThinVec::new());