Rollup merge of rust-lang#67045 - Centril:parser-import-clean, r=Mark-Simulacrum

rustc_parser: cleanup imports

Reorganize & canonicalize some imports + Drop `rustc_target` as a dependency.

r? @Mark-Simulacrum

Author: Centril

Cargo.lock

@@ -3806,7 +3806,6 @@ dependencies = [
  "rustc_errors",
  "rustc_feature",
  "rustc_lexer",
- "rustc_target",
  "smallvec 1.0.0",
  "syntax",
  "syntax_pos",

src/librustc_parse/Cargo.toml

@@ -12,12 +12,11 @@ doctest = false
 [dependencies]
 bitflags = "1.0"
 log = "0.4"
-syntax_pos = { path = "../libsyntax_pos" }
-syntax = { path = "../libsyntax" }
-errors = { path = "../librustc_errors", package = "rustc_errors" }
 rustc_data_structures = { path = "../librustc_data_structures" }
 rustc_feature = { path = "../librustc_feature" }
 rustc_lexer = { path = "../librustc_lexer" }
-rustc_target = { path = "../librustc_target" }
-smallvec = { version = "1.0", features = ["union", "may_dangle"] }
+rustc_errors = { path = "../librustc_errors" }
 rustc_error_codes = { path = "../librustc_error_codes" }
+smallvec = { version = "1.0", features = ["union", "may_dangle"] }
+syntax_pos = { path = "../libsyntax_pos" }
+syntax = { path = "../libsyntax" }

src/librustc_parse/config.rs

@@ -10,6 +10,7 @@
 
 use crate::validate_attr;
 use rustc_feature::Features;
+use rustc_errors::Applicability;
 use syntax::attr::HasAttrs;
 use syntax::feature_gate::{feature_err, get_features};
 use syntax::attr;
@@ -21,7 +22,6 @@ use syntax::sess::ParseSess;
 use syntax::util::map_in_place::MapInPlace;
 use syntax_pos::symbol::sym;
 
-use errors::Applicability;
 use smallvec::SmallVec;
 
 /// A folder that strips out items that do not belong in the current configuration.

src/librustc_parse/lexer/mod.rs

@@ -1,16 +1,15 @@
+use rustc_data_structures::sync::Lrc;
+use rustc_errors::{FatalError, DiagnosticBuilder};
+use rustc_lexer::Base;
+use rustc_lexer::unescape;
 use syntax::token::{self, Token, TokenKind};
 use syntax::sess::ParseSess;
-use syntax::symbol::{sym, Symbol};
 use syntax::util::comments;
-
-use errors::{FatalError, DiagnosticBuilder};
+use syntax_pos::symbol::{sym, Symbol};
 use syntax_pos::{BytePos, Pos, Span};
-use rustc_lexer::Base;
-use rustc_lexer::unescape;
 
 use std::char;
 use std::convert::TryInto;
-use rustc_data_structures::sync::Lrc;
 use log::debug;
 
 mod tokentrees;

src/librustc_parse/lexer/tokentrees.rs

@@ -1,13 +1,11 @@
-use rustc_data_structures::fx::FxHashMap;
-use syntax_pos::Span;
-
 use super::{StringReader, UnmatchedBrace};
 
+use rustc_data_structures::fx::FxHashMap;
+use rustc_errors::PResult;
 use syntax::print::pprust::token_to_string;
 use syntax::token::{self, Token};
 use syntax::tokenstream::{DelimSpan, IsJoint::{self, *}, TokenStream, TokenTree, TreeAndJoint};
-
-use errors::PResult;
+use syntax_pos::Span;
 
 impl<'a> StringReader<'a> {
     crate fn into_token_trees(self) -> (PResult<'a, TokenStream>, Vec<UnmatchedBrace>) {

src/librustc_parse/lexer/unicode_chars.rs

@@ -2,9 +2,9 @@
 // http://www.unicode.org/Public/security/10.0.0/confusables.txt
 
 use super::StringReader;
-use errors::{Applicability, DiagnosticBuilder};
-use syntax_pos::{BytePos, Pos, Span, symbol::kw};
 use crate::token;
+use rustc_errors::{Applicability, DiagnosticBuilder};
+use syntax_pos::{BytePos, Pos, Span, symbol::kw};
 
 #[rustfmt::skip] // for line breaks
 const UNICODE_ARRAY: &[(char, &str, char)] = &[

src/librustc_parse/lib.rs

@@ -8,7 +8,7 @@ use syntax::sess::ParseSess;
 use syntax::token::{self, Nonterminal};
 use syntax::tokenstream::{self, TokenStream, TokenTree};
 
-use errors::{PResult, FatalError, Level, Diagnostic};
+use rustc_errors::{PResult, FatalError, Level, Diagnostic};
 use rustc_data_structures::sync::Lrc;
 use syntax_pos::{Span, SourceFile, FileName};
 
@@ -53,7 +53,7 @@ pub enum DirectoryOwnership {
 macro_rules! panictry_buffer {
     ($handler:expr, $e:expr) => ({
         use std::result::Result::{Ok, Err};
-        use errors::FatalError;
+        use rustc_errors::FatalError;
         match $e {
             Ok(e) => e,
             Err(errs) => {

src/librustc_parse/parser/attr.rs

@@ -1,10 +1,10 @@
 use super::{SeqSep, Parser, TokenType, PathStyle};
+use rustc_errors::PResult;
 use syntax::attr;
 use syntax::ast;
 use syntax::util::comments;
 use syntax::token::{self, Nonterminal};
 use syntax_pos::{Span, Symbol};
-use errors::PResult;
 
 use log::debug;
 

src/librustc_parse/parser/diagnostics.rs

@@ -1,25 +1,22 @@
 use super::{BlockMode, PathStyle, SemiColonMode, TokenType, TokenExpectType, SeqSep, Parser};
 
-use syntax::ast::{
-    self, Param, BinOpKind, BindingMode, BlockCheckMode, Expr, ExprKind, Ident, Item, ItemKind,
-    Mutability, Pat, PatKind, PathSegment, QSelf, Ty, TyKind,
-};
+use rustc_data_structures::fx::FxHashSet;
+use rustc_errors::{self, PResult, Applicability, DiagnosticBuilder, Handler, pluralize};
+use rustc_error_codes::*;
+use syntax::ast::{self, Param, BinOpKind, BindingMode, BlockCheckMode, Expr, ExprKind, Ident, Item};
+use syntax::ast::{ItemKind, Mutability, Pat, PatKind, PathSegment, QSelf, Ty, TyKind};
 use syntax::token::{self, TokenKind, token_can_begin_expr};
 use syntax::print::pprust;
 use syntax::ptr::P;
-use syntax::symbol::{kw, sym};
 use syntax::ThinVec;
 use syntax::util::parser::AssocOp;
 use syntax::struct_span_err;
-
-use errors::{PResult, Applicability, DiagnosticBuilder, pluralize};
-use rustc_data_structures::fx::FxHashSet;
+use syntax_pos::symbol::{kw, sym};
 use syntax_pos::{Span, DUMMY_SP, MultiSpan, SpanSnippetError};
+
 use log::{debug, trace};
 use std::mem;
 
-use rustc_error_codes::*;
-
 const TURBOFISH: &'static str = "use `::<...>` instead of `<...>` to specify type arguments";
 
 /// Creates a placeholder argument.
@@ -61,10 +58,10 @@ pub enum Error {
 }
 
 impl Error {
-    fn span_err<S: Into<MultiSpan>>(
+    fn span_err(
         self,
-        sp: S,
-        handler: &errors::Handler,
+        sp: impl Into<MultiSpan>,
+        handler: &Handler,
     ) -> DiagnosticBuilder<'_> {
         match self {
             Error::FileNotFoundForModule {
@@ -212,7 +209,7 @@ impl<'a> Parser<'a> {
         self.sess.span_diagnostic.span_bug(sp, m)
     }
 
-    pub(super) fn diagnostic(&self) -> &'a errors::Handler {
+    pub(super) fn diagnostic(&self) -> &'a Handler {
         &self.sess.span_diagnostic
     }
 

src/librustc_parse/parser/expr.rs

@@ -4,23 +4,20 @@ use super::pat::{GateOr, PARAM_EXPECTED};
 use super::diagnostics::Error;
 use crate::maybe_recover_from_interpolated_ty_qpath;
 
-use syntax::ast::{
-    self, DUMMY_NODE_ID, Attribute, AttrStyle, Ident, CaptureBy, BlockCheckMode,
-    Expr, ExprKind, RangeLimits, Label, Movability, IsAsync, Arm, Ty, TyKind,
-    FunctionRetTy, Param, FnDecl, BinOpKind, BinOp, UnOp, Mac, AnonConst, Field, Lit,
-};
+use rustc_data_structures::thin_vec::ThinVec;
+use rustc_errors::{PResult, Applicability};
+use syntax::ast::{self, DUMMY_NODE_ID, Attribute, AttrStyle, Ident, CaptureBy, BlockCheckMode};
+use syntax::ast::{Expr, ExprKind, RangeLimits, Label, Movability, IsAsync, Arm, Ty, TyKind};
+use syntax::ast::{FunctionRetTy, Param, FnDecl, BinOpKind, BinOp, UnOp, Mac, AnonConst, Field, Lit};
 use syntax::token::{self, Token, TokenKind};
 use syntax::print::pprust;
 use syntax::ptr::P;
-use syntax::source_map::{self, Span};
 use syntax::util::classify;
 use syntax::util::literal::LitError;
 use syntax::util::parser::{AssocOp, Fixity, prec_let_scrutinee_needs_par};
-use syntax_pos::symbol::{kw, sym};
-use syntax_pos::Symbol;
-use errors::{PResult, Applicability};
+use syntax_pos::source_map::{self, Span};
+use syntax_pos::symbol::{kw, sym, Symbol};
 use std::mem;
-use rustc_data_structures::thin_vec::ThinVec;
 
 /// Possibly accepts an `token::Interpolated` expression (a pre-parsed expression
 /// dropped into the token stream, which happens while parsing the result of

src/librustc_parse/parser/generics.rs

@@ -1,11 +1,11 @@
 use super::Parser;
 
+use rustc_errors::PResult;
 use syntax::ast::{self, WhereClause, GenericParam, GenericParamKind, GenericBounds, Attribute};
 use syntax::token;
 use syntax::source_map::DUMMY_SP;
 use syntax_pos::symbol::{kw, sym};
 
-use errors::PResult;
 
 impl<'a> Parser<'a> {
     /// Parses bounds of a lifetime parameter `BOUND + BOUND + BOUND`, possibly with trailing `+`.

src/librustc_parse/parser/item.rs

@@ -3,6 +3,8 @@ use super::diagnostics::{Error, dummy_arg, ConsumeClosingDelim};
 
 use crate::maybe_whole;
 
+use rustc_errors::{PResult, Applicability, DiagnosticBuilder, StashKey};
+use rustc_error_codes::*;
 use syntax::ast::{self, DUMMY_NODE_ID, Ident, Attribute, AttrKind, AttrStyle, AnonConst, Item};
 use syntax::ast::{ItemKind, ImplItem, ImplItemKind, TraitItem, TraitItemKind, UseTree, UseTreeKind};
 use syntax::ast::{PathSegment, IsAuto, Constness, IsAsync, Unsafety, Defaultness, Extern, StrLit};
@@ -14,16 +16,13 @@ use syntax::ptr::P;
 use syntax::ThinVec;
 use syntax::token;
 use syntax::tokenstream::{DelimSpan, TokenTree, TokenStream};
-use syntax::source_map::{self, respan, Span};
 use syntax::struct_span_err;
 use syntax_pos::BytePos;
+use syntax_pos::source_map::{self, respan, Span};
 use syntax_pos::symbol::{kw, sym, Symbol};
 
-use rustc_error_codes::*;
-
 use log::debug;
 use std::mem;
-use errors::{PResult, Applicability, DiagnosticBuilder, StashKey};
 
 pub(super) type ItemInfo = (Ident, ItemKind, Option<Vec<Attribute>>);
 

src/librustc_parse/parser/mod.rs

@@ -14,23 +14,20 @@ use diagnostics::Error;
 use crate::{Directory, DirectoryOwnership};
 use crate::lexer::UnmatchedBrace;
 
-use syntax::ast::{
-    self, DUMMY_NODE_ID, AttrStyle, Attribute, CrateSugar, Extern, Ident, StrLit,
-    IsAsync, MacArgs, MacDelimiter, Mutability, Visibility, VisibilityKind, Unsafety,
-};
-
+use rustc_errors::{PResult, Applicability, DiagnosticBuilder, FatalError};
+use rustc_data_structures::thin_vec::ThinVec;
+use syntax::ast::{self, DUMMY_NODE_ID, AttrStyle, Attribute, CrateSugar, Extern, Ident, StrLit};
+use syntax::ast::{IsAsync, MacArgs, MacDelimiter, Mutability, Visibility, VisibilityKind, Unsafety};
 use syntax::print::pprust;
 use syntax::ptr::P;
 use syntax::token::{self, Token, TokenKind, DelimToken};
 use syntax::tokenstream::{self, DelimSpan, TokenTree, TokenStream, TreeAndJoint};
 use syntax::sess::ParseSess;
-use syntax::source_map::respan;
 use syntax::struct_span_err;
 use syntax::util::comments::{doc_comment_style, strip_doc_comment_decoration};
+use syntax_pos::source_map::respan;
 use syntax_pos::symbol::{kw, sym, Symbol};
 use syntax_pos::{Span, BytePos, DUMMY_SP, FileName};
-use rustc_data_structures::thin_vec::ThinVec;
-use errors::{PResult, Applicability, DiagnosticBuilder, FatalError};
 use log::debug;
 
 use std::borrow::Cow;

src/librustc_parse/parser/module.rs

@@ -4,13 +4,12 @@ use super::diagnostics::Error;
 
 use crate::{new_sub_parser_from_file, DirectoryOwnership};
 
+use rustc_errors::PResult;
 use syntax::attr;
 use syntax::ast::{self, Ident, Attribute, ItemKind, Mod, Crate};
 use syntax::token::{self, TokenKind};
-use syntax::source_map::{SourceMap, Span, DUMMY_SP, FileName};
-
+use syntax_pos::source_map::{SourceMap, Span, DUMMY_SP, FileName};
 use syntax_pos::symbol::sym;
-use errors::PResult;
 
 use std::path::{self, Path, PathBuf};
 

src/librustc_parse/parser/pat.rs

@@ -1,15 +1,15 @@
 use super::{Parser, PathStyle};
 use crate::{maybe_recover_from_interpolated_ty_qpath, maybe_whole};
+use rustc_errors::{PResult, Applicability, DiagnosticBuilder};
 use syntax::ast::{self, Attribute, Pat, PatKind, FieldPat, RangeEnd, RangeSyntax, Mac};
 use syntax::ast::{BindingMode, Ident, Mutability, Path, QSelf, Expr, ExprKind};
 use syntax::mut_visit::{noop_visit_pat, noop_visit_mac, MutVisitor};
 use syntax::ptr::P;
 use syntax::print::pprust;
 use syntax::ThinVec;
 use syntax::token;
-use syntax::source_map::{respan, Span, Spanned};
+use syntax_pos::source_map::{respan, Span, Spanned};
 use syntax_pos::symbol::{kw, sym};
-use errors::{PResult, Applicability, DiagnosticBuilder};
 
 type Expected = Option<&'static str>;
 

src/librustc_parse/parser/path.rs

@@ -1,16 +1,16 @@
 use super::{Parser, TokenType};
 use crate::maybe_whole;
+use rustc_errors::{PResult, Applicability, pluralize};
 use syntax::ast::{self, QSelf, Path, PathSegment, Ident, ParenthesizedArgs, AngleBracketedArgs};
 use syntax::ast::{AnonConst, GenericArg, AssocTyConstraint, AssocTyConstraintKind, BlockCheckMode};
 use syntax::ast::MacArgs;
 use syntax::ThinVec;
 use syntax::token::{self, Token};
-use syntax::source_map::{Span, BytePos};
+use syntax_pos::source_map::{Span, BytePos};
 use syntax_pos::symbol::{kw, sym};
 
 use std::mem;
 use log::debug;
-use errors::{PResult, Applicability, pluralize};
 
 /// Specifies how to parse a path.
 #[derive(Copy, Clone, PartialEq)]

src/librustc_parse/parser/stmt.rs

@@ -6,18 +6,18 @@ use super::diagnostics::Error;
 use crate::maybe_whole;
 use crate::DirectoryOwnership;
 
+use rustc_errors::{PResult, Applicability};
 use syntax::ThinVec;
 use syntax::ptr::P;
 use syntax::ast;
 use syntax::ast::{DUMMY_NODE_ID, Stmt, StmtKind, Local, Block, BlockCheckMode, Expr, ExprKind};
 use syntax::ast::{Attribute, AttrStyle, VisibilityKind, MacStmtStyle, Mac};
 use syntax::util::classify;
 use syntax::token;
-use syntax::source_map::{respan, Span};
-use syntax::symbol::{kw, sym};
+use syntax_pos::source_map::{respan, Span};
+use syntax_pos::symbol::{kw, sym};
 
 use std::mem;
-use errors::{PResult, Applicability};
 
 impl<'a> Parser<'a> {
     /// Parses a statement. This stops just before trailing semicolons on everything but items.

src/librustc_parse/parser/ty.rs

@@ -3,19 +3,17 @@ use super::item::ParamCfg;
 
 use crate::{maybe_whole, maybe_recover_from_interpolated_ty_qpath};
 
+use rustc_errors::{PResult, Applicability, pluralize};
+use rustc_error_codes::*;
 use syntax::ptr::P;
 use syntax::ast::{self, Ty, TyKind, MutTy, BareFnTy, FunctionRetTy, GenericParam, Lifetime, Ident};
 use syntax::ast::{TraitBoundModifier, TraitObjectSyntax, GenericBound, GenericBounds, PolyTraitRef};
 use syntax::ast::{Mutability, AnonConst, Mac};
 use syntax::token::{self, Token};
-use syntax::source_map::Span;
 use syntax::struct_span_fatal;
+use syntax_pos::source_map::Span;
 use syntax_pos::symbol::kw;
 
-use errors::{PResult, Applicability, pluralize};
-
-use rustc_error_codes::*;
-
 /// Returns `true` if `IDENT t` can start a type -- `IDENT::a::b`, `IDENT<u8, u8>`,
 /// `IDENT<<u8 as Trait>::AssocTy>`.
 ///

src/librustc_parse/validate_attr.rs

@@ -1,6 +1,6 @@
 //! Meta-syntax validation logic of attributes for post-expansion.
 
-use errors::{PResult, Applicability};
+use rustc_errors::{PResult, Applicability};
 use rustc_feature::{AttributeTemplate, BUILTIN_ATTRIBUTE_MAP};
 use syntax::ast::{self, Attribute, AttrKind, Ident, MacArgs, MetaItem, MetaItemKind};
 use syntax::attr::mk_name_value_item_str;