Add newtypes for bool fields/params/return types

compiler/rustc_ast/src/token.rs

@@ -107,7 +107,7 @@ impl Lit {
     /// Keep this in sync with `Token::can_begin_literal_or_bool` excluding unary negation.
     pub fn from_token(token: &Token) -> Option<Lit> {
         match token.uninterpolate().kind {
-            Ident(name, false) if name.is_bool_lit() => Some(Lit::new(Bool, name, None)),
+            Ident(name, IdentIsRaw::No) if name.is_bool_lit() => Some(Lit::new(Bool, name, None)),
             Literal(token_lit) => Some(token_lit),
             Interpolated(ref nt)
                 if let NtExpr(expr) | NtLiteral(expr) = &nt.0
@@ -183,7 +183,7 @@ impl LitKind {
     }
 }
 
-pub fn ident_can_begin_expr(name: Symbol, span: Span, is_raw: bool) -> bool {
+pub fn ident_can_begin_expr(name: Symbol, span: Span, is_raw: IdentIsRaw) -> bool {
     let ident_token = Token::new(Ident(name, is_raw), span);
 
     !ident_token.is_reserved_ident()
@@ -214,7 +214,7 @@ pub fn ident_can_begin_expr(name: Symbol, span: Span, is_raw: bool) -> bool {
         .contains(&name)
 }
 
-fn ident_can_begin_type(name: Symbol, span: Span, is_raw: bool) -> bool {
+fn ident_can_begin_type(name: Symbol, span: Span, is_raw: IdentIsRaw) -> bool {
     let ident_token = Token::new(Ident(name, is_raw), span);
 
     !ident_token.is_reserved_ident()
@@ -223,6 +223,24 @@ fn ident_can_begin_type(name: Symbol, span: Span, is_raw: bool) -> bool {
             .contains(&name)
 }
 
+#[derive(PartialEq, Encodable, Decodable, Debug, Copy, Clone, HashStable_Generic)]
+pub enum IdentIsRaw {
+    No,
+    Yes,
+}
+
+impl From<bool> for IdentIsRaw {
+    fn from(b: bool) -> Self {
+        if b { Self::Yes } else { Self::No }
+    }
+}
+
+impl From<IdentIsRaw> for bool {
+    fn from(is_raw: IdentIsRaw) -> bool {
+        matches!(is_raw, IdentIsRaw::Yes)
+    }
+}
+
 // SAFETY: due to the `Clone` impl below, all fields of all variants other than
 // `Interpolated` must impl `Copy`.
 #[derive(PartialEq, Encodable, Decodable, Debug, HashStable_Generic)]
@@ -298,7 +316,7 @@ pub enum TokenKind {
     /// Do not forget about `NtIdent` when you want to match on identifiers.
     /// It's recommended to use `Token::(ident,uninterpolate,uninterpolated_span)` to
     /// treat regular and interpolated identifiers in the same way.
-    Ident(Symbol, /* is_raw */ bool),
+    Ident(Symbol, IdentIsRaw),
     /// Lifetime identifier token.
     /// Do not forget about `NtLifetime` when you want to match on lifetime identifiers.
     /// It's recommended to use `Token::(lifetime,uninterpolate,uninterpolated_span)` to
@@ -411,7 +429,7 @@ impl Token {
 
     /// Recovers a `Token` from an `Ident`. This creates a raw identifier if necessary.
     pub fn from_ast_ident(ident: Ident) -> Self {
-        Token::new(Ident(ident.name, ident.is_raw_guess()), ident.span)
+        Token::new(Ident(ident.name, ident.is_raw_guess().into()), ident.span)
     }
 
     /// For interpolated tokens, returns a span of the fragment to which the interpolated
@@ -567,7 +585,7 @@ impl Token {
     pub fn can_begin_literal_maybe_minus(&self) -> bool {
         match self.uninterpolate().kind {
             Literal(..) | BinOp(Minus) => true,
-            Ident(name, false) if name.is_bool_lit() => true,
+            Ident(name, IdentIsRaw::No) if name.is_bool_lit() => true,
             Interpolated(ref nt) => match &nt.0 {
                 NtLiteral(_) => true,
                 NtExpr(e) => match &e.kind {
@@ -602,7 +620,7 @@ impl Token {
 
     /// Returns an identifier if this token is an identifier.
     #[inline]
-    pub fn ident(&self) -> Option<(Ident, /* is_raw */ bool)> {
+    pub fn ident(&self) -> Option<(Ident, IdentIsRaw)> {
         // We avoid using `Token::uninterpolate` here because it's slow.
         match &self.kind {
             &Ident(name, is_raw) => Some((Ident::new(name, self.span), is_raw)),
@@ -755,7 +773,7 @@ impl Token {
     /// Returns `true` if the token is a non-raw identifier for which `pred` holds.
     pub fn is_non_raw_ident_where(&self, pred: impl FnOnce(Ident) -> bool) -> bool {
         match self.ident() {
-            Some((id, false)) => pred(id),
+            Some((id, IdentIsRaw::No)) => pred(id),
             _ => false,
         }
     }
@@ -806,7 +824,7 @@ impl Token {
                 _ => return None,
             },
             SingleQuote => match joint.kind {
-                Ident(name, false) => Lifetime(Symbol::intern(&format!("'{name}"))),
+                Ident(name, IdentIsRaw::No) => Lifetime(Symbol::intern(&format!("'{name}"))),
                 _ => return None,
             },
 
@@ -836,7 +854,7 @@ pub enum Nonterminal {
     NtPat(P<ast::Pat>),
     NtExpr(P<ast::Expr>),
     NtTy(P<ast::Ty>),
-    NtIdent(Ident, /* is_raw */ bool),
+    NtIdent(Ident, IdentIsRaw),
     NtLifetime(Ident),
     NtLiteral(P<ast::Expr>),
     /// Stuff inside brackets for attributes

compiler/rustc_ast/src/tokenstream.rs

@@ -656,7 +656,7 @@ impl TokenStream {
                 DelimSpacing::new(Spacing::JointHidden, Spacing::Alone),
                 Delimiter::Bracket,
                 [
-                    TokenTree::token_alone(token::Ident(sym::doc, false), span),
+                    TokenTree::token_alone(token::Ident(sym::doc, token::IdentIsRaw::No), span),
                     TokenTree::token_alone(token::Eq, span),
                     TokenTree::token_alone(
                         TokenKind::lit(token::StrRaw(num_of_hashes), data, None),

compiler/rustc_ast_pretty/src/pprust/state.rs

@@ -185,7 +185,7 @@ fn space_between(tt1: &TokenTree, tt2: &TokenTree) -> bool {
 
         // IDENT + `!`: `println!()`, but `if !x { ... }` needs a space after the `if`
         (Tok(Token { kind: Ident(sym, is_raw), span }, _), Tok(Token { kind: Not, .. }, _))
-            if !Ident::new(*sym, *span).is_reserved() || *is_raw =>
+            if !Ident::new(*sym, *span).is_reserved() || matches!(is_raw, IdentIsRaw::Yes) =>
         {
             false
         }
@@ -197,7 +197,7 @@ fn space_between(tt1: &TokenTree, tt2: &TokenTree) -> bool {
                 || *sym == kw::Fn
                 || *sym == kw::SelfUpper
                 || *sym == kw::Pub
-                || *is_raw =>
+                || matches!(is_raw, IdentIsRaw::Yes) =>
         {
             false
         }
@@ -731,7 +731,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
             token::NtBlock(e) => self.block_to_string(e),
             token::NtStmt(e) => self.stmt_to_string(e),
             token::NtPat(e) => self.pat_to_string(e),
-            token::NtIdent(e, is_raw) => IdentPrinter::for_ast_ident(*e, *is_raw).to_string(),
+            &token::NtIdent(e, is_raw) => IdentPrinter::for_ast_ident(e, is_raw.into()).to_string(),
             token::NtLifetime(e) => e.to_string(),
             token::NtLiteral(e) => self.expr_to_string(e),
             token::NtVis(e) => self.vis_to_string(e),
@@ -795,7 +795,7 @@ pub trait PrintState<'a>: std::ops::Deref<Target = pp::Printer> + std::ops::Dere
 
             /* Name components */
             token::Ident(s, is_raw) => {
-                IdentPrinter::new(s, is_raw, convert_dollar_crate).to_string().into()
+                IdentPrinter::new(s, is_raw.into(), convert_dollar_crate).to_string().into()
             }
             token::Lifetime(s) => s.to_string().into(),
 

compiler/rustc_builtin_macros/src/asm.rs

@@ -1,3 +1,4 @@
+use ast::token::IdentIsRaw;
 use rustc_ast as ast;
 use rustc_ast::ptr::P;
 use rustc_ast::token::{self, Delimiter};
@@ -416,7 +417,7 @@ fn parse_reg<'a>(
 ) -> PResult<'a, ast::InlineAsmRegOrRegClass> {
     p.expect(&token::OpenDelim(Delimiter::Parenthesis))?;
     let result = match p.token.uninterpolate().kind {
-        token::Ident(name, false) => ast::InlineAsmRegOrRegClass::RegClass(name),
+        token::Ident(name, IdentIsRaw::No) => ast::InlineAsmRegOrRegClass::RegClass(name),
         token::Literal(token::Lit { kind: token::LitKind::Str, symbol, suffix: _ }) => {
             *explicit_reg = true;
             ast::InlineAsmRegOrRegClass::Reg(symbol)

compiler/rustc_builtin_macros/src/assert/context.rs

@@ -1,7 +1,6 @@
 use rustc_ast::{
     ptr::P,
-    token,
-    token::Delimiter,
+    token::{self, Delimiter, IdentIsRaw},
     tokenstream::{DelimSpan, TokenStream, TokenTree},
     BinOpKind, BorrowKind, DelimArgs, Expr, ExprKind, ItemKind, MacCall, MethodCall, Mutability,
     Path, PathSegment, Stmt, StructRest, UnOp, UseTree, UseTreeKind, DUMMY_NODE_ID,
@@ -170,7 +169,10 @@ impl<'cx, 'a> Context<'cx, 'a> {
         ];
         let captures = self.capture_decls.iter().flat_map(|cap| {
             [
-                TokenTree::token_joint_hidden(token::Ident(cap.ident.name, false), cap.ident.span),
+                TokenTree::token_joint_hidden(
+                    token::Ident(cap.ident.name, IdentIsRaw::No),
+                    cap.ident.span,
+                ),
                 TokenTree::token_alone(token::Comma, self.span),
             ]
         });

compiler/rustc_builtin_macros/src/deriving/decodable.rs

@@ -198,7 +198,7 @@ where
     match fields {
         Unnamed(fields, is_tuple) => {
             let path_expr = cx.expr_path(outer_pat_path);
-            if !*is_tuple {
+            if matches!(is_tuple, IsTuple::No) {
                 path_expr
             } else {
                 let fields = fields

compiler/rustc_builtin_macros/src/deriving/default.rs

@@ -62,8 +62,8 @@ fn default_struct_substructure(
     let default_call = |span| cx.expr_call_global(span, default_ident.clone(), ThinVec::new());
 
     let expr = match summary {
-        Unnamed(_, false) => cx.expr_ident(trait_span, substr.type_ident),
-        Unnamed(fields, true) => {
+        Unnamed(_, IsTuple::No) => cx.expr_ident(trait_span, substr.type_ident),
+        Unnamed(fields, IsTuple::Yes) => {
             let exprs = fields.iter().map(|sp| default_call(*sp)).collect();
             cx.expr_call_ident(trait_span, substr.type_ident, exprs)
         }

compiler/rustc_builtin_macros/src/deriving/generic/mod.rs

@@ -286,10 +286,16 @@ pub struct FieldInfo {
     pub other_selflike_exprs: Vec<P<Expr>>,
 }
 
+#[derive(Copy, Clone)]
+pub enum IsTuple {
+    No,
+    Yes,
+}
+
 /// Fields for a static method
 pub enum StaticFields {
     /// Tuple and unit structs/enum variants like this.
-    Unnamed(Vec<Span>, bool /*is tuple*/),
+    Unnamed(Vec<Span>, IsTuple),
     /// Normal structs/struct variants.
     Named(Vec<(Ident, Span)>),
 }
@@ -1439,7 +1445,10 @@ impl<'a> TraitDef<'a> {
             }
         }
 
-        let is_tuple = matches!(struct_def, ast::VariantData::Tuple(..));
+        let is_tuple = match struct_def {
+            ast::VariantData::Tuple(..) => IsTuple::Yes,
+            _ => IsTuple::No,
+        };
         match (just_spans.is_empty(), named_idents.is_empty()) {
             (false, false) => cx
                 .dcx()

compiler/rustc_builtin_macros/src/format.rs

@@ -10,6 +10,7 @@ use rustc_ast::{
 use rustc_data_structures::fx::FxHashSet;
 use rustc_errors::{Applicability, DiagnosticBuilder, MultiSpan, PResult, SingleLabelManySpans};
 use rustc_expand::base::{self, *};
+use rustc_parse::parser::Recovered;
 use rustc_parse_format as parse;
 use rustc_span::symbol::{Ident, Symbol};
 use rustc_span::{BytePos, InnerSpan, Span};
@@ -111,9 +112,8 @@ fn parse_args<'a>(ecx: &mut ExtCtxt<'a>, sp: Span, tts: TokenStream) -> PResult<
                         _ => return Err(err),
                     }
                 }
-                Ok(recovered) => {
-                    assert!(recovered);
-                }
+                Ok(Recovered::Yes) => (),
+                Ok(Recovered::No) => unreachable!(),
             }
         }
         first = false;

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -2094,65 +2094,72 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
             return Ok(args[0].immediate());
         }
 
+        #[derive(Copy, Clone)]
+        enum Sign {
+            Unsigned,
+            Signed,
+        }
+        use Sign::*;
+
         enum Style {
             Float,
-            Int(/* is signed? */ bool),
+            Int(Sign),
             Unsupported,
         }
 
         let (in_style, in_width) = match in_elem.kind() {
             // vectors of pointer-sized integers should've been
             // disallowed before here, so this unwrap is safe.
             ty::Int(i) => (
-                Style::Int(true),
+                Style::Int(Signed),
                 i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
             ),
             ty::Uint(u) => (
-                Style::Int(false),
+                Style::Int(Unsigned),
                 u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
             ),
             ty::Float(f) => (Style::Float, f.bit_width()),
             _ => (Style::Unsupported, 0),
         };
         let (out_style, out_width) = match out_elem.kind() {
             ty::Int(i) => (
-                Style::Int(true),
+                Style::Int(Signed),
                 i.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
             ),
             ty::Uint(u) => (
-                Style::Int(false),
+                Style::Int(Unsigned),
                 u.normalize(bx.tcx().sess.target.pointer_width).bit_width().unwrap(),
             ),
             ty::Float(f) => (Style::Float, f.bit_width()),
             _ => (Style::Unsupported, 0),
         };
 
         match (in_style, out_style) {
-            (Style::Int(in_is_signed), Style::Int(_)) => {
+            (Style::Int(sign), Style::Int(_)) => {
                 return Ok(match in_width.cmp(&out_width) {
                     Ordering::Greater => bx.trunc(args[0].immediate(), llret_ty),
                     Ordering::Equal => args[0].immediate(),
-                    Ordering::Less => {
-                        if in_is_signed {
-                            bx.sext(args[0].immediate(), llret_ty)
-                        } else {
-                            bx.zext(args[0].immediate(), llret_ty)
-                        }
-                    }
+                    Ordering::Less => match sign {
+                        Sign::Signed => bx.sext(args[0].immediate(), llret_ty),
+                        Sign::Unsigned => bx.zext(args[0].immediate(), llret_ty),
+                    },
                 });
             }
-            (Style::Int(in_is_signed), Style::Float) => {
-                return Ok(if in_is_signed {
-                    bx.sitofp(args[0].immediate(), llret_ty)
-                } else {
-                    bx.uitofp(args[0].immediate(), llret_ty)
-                });
+            (Style::Int(Sign::Signed), Style::Float) => {
+                return Ok(bx.sitofp(args[0].immediate(), llret_ty));
             }
-            (Style::Float, Style::Int(out_is_signed)) => {
-                return Ok(match (out_is_signed, name == sym::simd_as) {
-                    (false, false) => bx.fptoui(args[0].immediate(), llret_ty),
-                    (true, false) => bx.fptosi(args[0].immediate(), llret_ty),
-                    (_, true) => bx.cast_float_to_int(out_is_signed, args[0].immediate(), llret_ty),
+            (Style::Int(Sign::Unsigned), Style::Float) => {
+                return Ok(bx.uitofp(args[0].immediate(), llret_ty));
+            }
+            (Style::Float, Style::Int(sign)) => {
+                return Ok(match (sign, name == sym::simd_as) {
+                    (Sign::Unsigned, false) => bx.fptoui(args[0].immediate(), llret_ty),
+                    (Sign::Signed, false) => bx.fptosi(args[0].immediate(), llret_ty),
+                    (_, true) => bx.cast_float_to_int(
+                        matches!(sign, Sign::Signed),
+                        args[0].immediate(),
+                        llret_ty,
+                    ),
                 });
             }
             (Style::Float, Style::Float) => {

compiler/rustc_expand/src/mbe/macro_check.rs

@@ -107,7 +107,7 @@
 use crate::errors;
 use crate::mbe::{KleeneToken, TokenTree};
 
-use rustc_ast::token::{Delimiter, Token, TokenKind};
+use rustc_ast::token::{Delimiter, IdentIsRaw, Token, TokenKind};
 use rustc_ast::{NodeId, DUMMY_NODE_ID};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_errors::{DiagnosticMessage, MultiSpan};
@@ -409,7 +409,7 @@ fn check_nested_occurrences(
         match (state, tt) {
             (
                 NestedMacroState::Empty,
-                &TokenTree::Token(Token { kind: TokenKind::Ident(name, false), .. }),
+                &TokenTree::Token(Token { kind: TokenKind::Ident(name, IdentIsRaw::No), .. }),
             ) => {
                 if name == kw::MacroRules {
                     state = NestedMacroState::MacroRules;