ast-builder + transpile: Add RawAddr that was missing in a few places (#1812)

This doesn't seem to have caused any problems so far, but still good to
have it.

Author: ahomescu

c2rust-ast-builder/src/builder.rs

@@ -2213,7 +2213,7 @@ fn expr_precedence(e: &Expr) -> u8 {
         Expr::Field(_ef) => 16,
         Expr::Call(_) | Expr::Index(_) => 15,
         Expr::Try(_et) => 14,
-        Expr::Unary(_) | Expr::Reference(_) => 13,
+        Expr::Unary(_) | Expr::Reference(_) | Expr::RawAddr(_) => 13,
         Expr::Cast(_ec) => 12,
         Expr::Binary(eb) => 2 + binop_precedence(&eb.op),
         Expr::Assign(_) => 1,
@@ -2315,6 +2315,9 @@ fn parenthesize_if_necessary(mut outer: Expr) -> Expr {
         Expr::Reference(ref mut er) => {
             parenthesize_if_gt(&mut er.expr);
         }
+        Expr::RawAddr(ref mut er) => {
+            parenthesize_if_gt(&mut er.expr);
+        }
         Expr::Binary(ref mut eb) => {
             parenthesize_if_gt(&mut eb.left);
             // Because binops associate right, parenthesize same-precedence RHS

c2rust-transpile/src/rust_ast/traverse.rs

@@ -214,6 +214,10 @@ pub fn traverse_expr_def<W: Traversal>(walk: &mut W, e: Expr) -> Expr {
             expr: e.expr.traverse(walk),
             ..e
         }),
+        Expr::RawAddr(e) => Expr::RawAddr(ExprRawAddr {
+            expr: e.expr.traverse(walk),
+            ..e
+        }),
         Expr::Break(e) => Expr::Break(ExprBreak {
             expr: e.expr.traverse(walk),
             ..e