Add warn(unreachable_pub) to rustc_ast_pretty.

compiler/rustc_ast_pretty/src/lib.rs

@@ -3,6 +3,7 @@
 #![doc(rust_logo)]
 #![feature(box_patterns)]
 #![feature(rustdoc_internals)]
+#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 mod helpers;

compiler/rustc_ast_pretty/src/pp/convenience.rs

@@ -89,7 +89,7 @@ pub fn trailing_comma_or_space(&mut self) {
 }
 
 impl Token {
-    pub fn is_hardbreak_tok(&self) -> bool {
+    pub(crate) fn is_hardbreak_tok(&self) -> bool {
         *self == Printer::hardbreak_tok_offset(0)
     }
 }

compiler/rustc_ast_pretty/src/pp/ring.rs

@@ -11,54 +11,54 @@
 /// Holding a RingBuffer whose view is elements left..right gives the ability to
 /// use Index and IndexMut to access elements i in the infinitely long queue for
 /// which left <= i < right.
-pub struct RingBuffer<T> {
+pub(super) struct RingBuffer<T> {
     data: VecDeque<T>,
     // Abstract index of data[0] in the infinitely sized queue.
     offset: usize,
 }
 
 impl<T> RingBuffer<T> {
-    pub fn new() -> Self {
+    pub(super) fn new() -> Self {
         RingBuffer { data: VecDeque::new(), offset: 0 }
     }
 
-    pub fn is_empty(&self) -> bool {
+    pub(super) fn is_empty(&self) -> bool {
         self.data.is_empty()
     }
 
-    pub fn push(&mut self, value: T) -> usize {
+    pub(super) fn push(&mut self, value: T) -> usize {
         let index = self.offset + self.data.len();
         self.data.push_back(value);
         index
     }
 
-    pub fn clear(&mut self) {
+    pub(super) fn clear(&mut self) {
         self.data.clear();
     }
 
-    pub fn index_of_first(&self) -> usize {
+    pub(super) fn index_of_first(&self) -> usize {
         self.offset
     }
 
-    pub fn first(&self) -> Option<&T> {
+    pub(super) fn first(&self) -> Option<&T> {
         self.data.front()
     }
 
-    pub fn first_mut(&mut self) -> Option<&mut T> {
+    pub(super) fn first_mut(&mut self) -> Option<&mut T> {
         self.data.front_mut()
     }
 
-    pub fn pop_first(&mut self) -> Option<T> {
+    pub(super) fn pop_first(&mut self) -> Option<T> {
         let first = self.data.pop_front()?;
         self.offset += 1;
         Some(first)
     }
 
-    pub fn last(&self) -> Option<&T> {
+    pub(super) fn last(&self) -> Option<&T> {
         self.data.back()
     }
 
-    pub fn last_mut(&mut self) -> Option<&mut T> {
+    pub(super) fn last_mut(&mut self) -> Option<&mut T> {
         self.data.back_mut()
     }
 }

compiler/rustc_ast_pretty/src/pprust/state/fixup.rs

@@ -110,13 +110,13 @@ fn default() -> Self {
 impl FixupContext {
     /// Create the initial fixup for printing an expression in statement
     /// position.
-    pub fn new_stmt() -> Self {
+    pub(crate) fn new_stmt() -> Self {
         FixupContext { stmt: true, ..FixupContext::default() }
     }
 
     /// Create the initial fixup for printing an expression as the right-hand
     /// side of a match arm.
-    pub fn new_match_arm() -> Self {
+    pub(crate) fn new_match_arm() -> Self {
         FixupContext { match_arm: true, ..FixupContext::default() }
     }
 
@@ -124,7 +124,7 @@ pub fn new_match_arm() -> Self {
     /// of an `if` or `while`. There are a few other positions which are
     /// grammatically equivalent and also use this, such as the iterator
     /// expression in `for` and the scrutinee in `match`.
-    pub fn new_cond() -> Self {
+    pub(crate) fn new_cond() -> Self {
         FixupContext { parenthesize_exterior_struct_lit: true, ..FixupContext::default() }
     }
 
@@ -139,7 +139,7 @@ pub fn new_cond() -> Self {
     ///
     /// Not every expression has a leftmost subexpression. For example neither
     /// `-$a` nor `[$a]` have one.
-    pub fn leftmost_subexpression(self) -> Self {
+    pub(crate) fn leftmost_subexpression(self) -> Self {
         FixupContext {
             stmt: false,
             leftmost_subexpression_in_stmt: self.stmt || self.leftmost_subexpression_in_stmt,
@@ -158,7 +158,7 @@ pub fn leftmost_subexpression(self) -> Self {
     /// current expression, and is not surrounded by a paren/bracket/brace. For
     /// example the `$b` in `$a + $b` and `-$b`, but not the one in `[$b]` or
     /// `$a.f($b)`.
-    pub fn subsequent_subexpression(self) -> Self {
+    pub(crate) fn subsequent_subexpression(self) -> Self {
         FixupContext {
             stmt: false,
             leftmost_subexpression_in_stmt: false,
@@ -173,7 +173,7 @@ pub fn subsequent_subexpression(self) -> Self {
     ///
     /// The documentation on `FixupContext::leftmost_subexpression_in_stmt` has
     /// examples.
-    pub fn would_cause_statement_boundary(self, expr: &Expr) -> bool {
+    pub(crate) fn would_cause_statement_boundary(self, expr: &Expr) -> bool {
         (self.leftmost_subexpression_in_stmt && !classify::expr_requires_semi_to_be_stmt(expr))
             || (self.leftmost_subexpression_in_match_arm && classify::expr_is_complete(expr))
     }
@@ -189,7 +189,7 @@ pub fn would_cause_statement_boundary(self, expr: &Expr) -> bool {
     ///
     ///   - `true && false`, because otherwise this would be misinterpreted as a
     ///     "let chain".
-    pub fn needs_par_as_let_scrutinee(self, expr: &Expr) -> bool {
+    pub(crate) fn needs_par_as_let_scrutinee(self, expr: &Expr) -> bool {
         self.parenthesize_exterior_struct_lit && parser::contains_exterior_struct_lit(expr)
             || parser::needs_par_as_let_scrutinee(expr.precedence().order())
     }