From 49d4a756f1138d8246abb1c027490d1ea37be920 Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Fri, 9 Oct 2020 11:20:56 +0200
Subject: [PATCH] Remove unused code from rustc_ast

---
 compiler/rustc_ast/src/ast.rs         | 38 ---------------------------
 compiler/rustc_ast/src/attr/mod.rs    |  9 -------
 compiler/rustc_ast/src/token.rs       | 10 -------
 compiler/rustc_ast/src/tokenstream.rs |  6 -----
 compiler/rustc_ast/src/util/parser.rs |  1 -
 5 files changed, 64 deletions(-)

diff --git a/compiler/rustc_ast/src/ast.rs b/compiler/rustc_ast/src/ast.rs
index 245353c2e07..8f156aea2ff 100644
--- a/compiler/rustc_ast/src/ast.rs
+++ b/compiler/rustc_ast/src/ast.rs
@@ -167,13 +167,6 @@ pub enum GenericArgs {
 }
 
 impl GenericArgs {
-    pub fn is_parenthesized(&self) -> bool {
-        match *self {
-            Parenthesized(..) => true,
-            _ => false,
-        }
-    }
-
     pub fn is_angle_bracketed(&self) -> bool {
         match *self {
             AngleBracketed(..) => true,
@@ -857,13 +850,6 @@ impl BinOpKind {
         }
     }
 
-    pub fn is_shift(&self) -> bool {
-        match *self {
-            BinOpKind::Shl | BinOpKind::Shr => true,
-            _ => false,
-        }
-    }
-
     pub fn is_comparison(&self) -> bool {
         use BinOpKind::*;
         // Note for developers: please keep this as is;
@@ -873,11 +859,6 @@ impl BinOpKind {
             And | Or | Add | Sub | Mul | Div | Rem | BitXor | BitAnd | BitOr | Shl | Shr => false,
         }
     }
-
-    /// Returns `true` if the binary operator takes its arguments by value
-    pub fn is_by_value(&self) -> bool {
-        !self.is_comparison()
-    }
 }
 
 pub type BinOp = Spanned<BinOpKind>;
@@ -896,14 +877,6 @@ pub enum UnOp {
 }
 
 impl UnOp {
-    /// Returns `true` if the unary operator takes its argument by value
-    pub fn is_by_value(u: UnOp) -> bool {
-        match u {
-            UnOp::Neg | UnOp::Not => true,
-            _ => false,
-        }
-    }
-
     pub fn to_string(op: UnOp) -> &'static str {
         match op {
             UnOp::Deref => "*",
@@ -1753,13 +1726,6 @@ impl IntTy {
         }
     }
 
-    pub fn val_to_string(&self, val: i128) -> String {
-        // Cast to a `u128` so we can correctly print `INT128_MIN`. All integral types
-        // are parsed as `u128`, so we wouldn't want to print an extra negative
-        // sign.
-        format!("{}{}", val as u128, self.name_str())
-    }
-
     pub fn bit_width(&self) -> Option<u64> {
         Some(match *self {
             IntTy::Isize => return None,
@@ -1818,10 +1784,6 @@ impl UintTy {
         }
     }
 
-    pub fn val_to_string(&self, val: u128) -> String {
-        format!("{}{}", val, self.name_str())
-    }
-
     pub fn bit_width(&self) -> Option<u64> {
         Some(match *self {
             UintTy::Usize => return None,
diff --git a/compiler/rustc_ast/src/attr/mod.rs b/compiler/rustc_ast/src/attr/mod.rs
index 2782869fb88..8351be222f6 100644
--- a/compiler/rustc_ast/src/attr/mod.rs
+++ b/compiler/rustc_ast/src/attr/mod.rs
@@ -101,11 +101,6 @@ impl NestedMetaItem {
         self.meta_item().is_some()
     }
 
-    /// Returns `true` if the variant is `Literal`.
-    pub fn is_literal(&self) -> bool {
-        self.literal().is_some()
-    }
-
     /// Returns `true` if `self` is a `MetaItem` and the meta item is a word.
     pub fn is_word(&self) -> bool {
         self.meta_item().map_or(false, |meta_item| meta_item.is_word())
@@ -232,10 +227,6 @@ impl MetaItem {
     pub fn is_value_str(&self) -> bool {
         self.value_str().is_some()
     }
-
-    pub fn is_meta_item_list(&self) -> bool {
-        self.meta_item_list().is_some()
-    }
 }
 
 impl AttrItem {
diff --git a/compiler/rustc_ast/src/token.rs b/compiler/rustc_ast/src/token.rs
index d5b3e87adc3..e3992582c0b 100644
--- a/compiler/rustc_ast/src/token.rs
+++ b/compiler/rustc_ast/src/token.rs
@@ -54,16 +54,6 @@ pub enum DelimToken {
     NoDelim,
 }
 
-impl DelimToken {
-    pub fn len(self) -> usize {
-        if self == NoDelim { 0 } else { 1 }
-    }
-
-    pub fn is_empty(self) -> bool {
-        self == NoDelim
-    }
-}
-
 #[derive(Clone, Copy, PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
 pub enum LitKind {
     Bool, // AST only, must never appear in a `Token`
diff --git a/compiler/rustc_ast/src/tokenstream.rs b/compiler/rustc_ast/src/tokenstream.rs
index f201f0b5c66..8acb6b2f375 100644
--- a/compiler/rustc_ast/src/tokenstream.rs
+++ b/compiler/rustc_ast/src/tokenstream.rs
@@ -295,12 +295,6 @@ impl TokenStream {
                 .collect(),
         ))
     }
-
-    pub fn map<F: FnMut(TokenTree) -> TokenTree>(self, mut f: F) -> TokenStream {
-        TokenStream(Lrc::new(
-            self.0.iter().map(|(tree, is_joint)| (f(tree.clone()), *is_joint)).collect(),
-        ))
-    }
 }
 
 // 99.5%+ of the time we have 1 or 2 elements in this vector.
diff --git a/compiler/rustc_ast/src/util/parser.rs b/compiler/rustc_ast/src/util/parser.rs
index 2ee94965756..be5516ef471 100644
--- a/compiler/rustc_ast/src/util/parser.rs
+++ b/compiler/rustc_ast/src/util/parser.rs
@@ -231,7 +231,6 @@ impl AssocOp {
     }
 }
 
-pub const PREC_RESET: i8 = -100;
 pub const PREC_CLOSURE: i8 = -40;
 pub const PREC_JUMP: i8 = -30;
 pub const PREC_RANGE: i8 = -10;