Minimize pub usage in source_map.rs.

Most notably, this commit changes the `pub use crate::*;` in that file
to `use crate::*;`. This requires a lot of `use` items in other crates
to be adjusted, because everything defined within `rustc_span::*` was
also available via `rustc_span::source_map::*`, which is bizarre.

The commit also removes `SourceMap::span_to_relative_line_string`, which
is unused.

Author: nnethercote

compiler/rustc_ast_lowering/src/expr.rs

@@ -15,9 +15,10 @@ use rustc_hir as hir;
 use rustc_hir::def::Res;
 use rustc_hir::definitions::DefPathData;
 use rustc_session::errors::report_lit_error;
-use rustc_span::source_map::{respan, DesugaringKind, Span, Spanned};
+use rustc_span::source_map::{respan, Spanned};
 use rustc_span::symbol::{sym, Ident, Symbol};
 use rustc_span::DUMMY_SP;
+use rustc_span::{DesugaringKind, Span};
 use thin_vec::{thin_vec, ThinVec};
 
 impl<'hir> LoweringContext<'_, 'hir> {

compiler/rustc_ast_lowering/src/item.rs

@@ -16,9 +16,8 @@ use rustc_hir::PredicateOrigin;
 use rustc_index::{Idx, IndexSlice, IndexVec};
 use rustc_middle::ty::{ResolverAstLowering, TyCtxt};
 use rustc_span::edit_distance::find_best_match_for_name;
-use rustc_span::source_map::DesugaringKind;
 use rustc_span::symbol::{kw, sym, Ident};
-use rustc_span::{Span, Symbol};
+use rustc_span::{DesugaringKind, Span, Symbol};
 use rustc_target::spec::abi;
 use smallvec::{smallvec, SmallVec};
 use thin_vec::ThinVec;

compiler/rustc_ast_lowering/src/lib.rs

@@ -71,9 +71,8 @@ use rustc_middle::{
 };
 use rustc_session::parse::{add_feature_diagnostics, feature_err};
 use rustc_span::hygiene::MacroKind;
-use rustc_span::source_map::DesugaringKind;
 use rustc_span::symbol::{kw, sym, Ident, Symbol};
-use rustc_span::{Span, DUMMY_SP};
+use rustc_span::{DesugaringKind, Span, DUMMY_SP};
 use smallvec::SmallVec;
 use std::collections::hash_map::Entry;
 use thin_vec::ThinVec;

compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs

@@ -9,9 +9,8 @@ use rustc_middle::{
     hir::place::PlaceBase,
     mir::{self, BindingForm, Local, LocalDecl, LocalInfo, LocalKind, Location},
 };
-use rustc_span::source_map::DesugaringKind;
 use rustc_span::symbol::{kw, Symbol};
-use rustc_span::{sym, BytePos, Span};
+use rustc_span::{sym, BytePos, DesugaringKind, Span};
 use rustc_target::abi::FieldIdx;
 
 use crate::diagnostics::BorrowedContentSource;

compiler/rustc_borrowck/src/diagnostics/var_name.rs

@@ -6,8 +6,8 @@ use crate::Upvar;
 use rustc_index::IndexSlice;
 use rustc_middle::mir::{Body, Local};
 use rustc_middle::ty::{RegionVid, TyCtxt};
-use rustc_span::source_map::Span;
 use rustc_span::symbol::Symbol;
+use rustc_span::Span;
 
 impl<'tcx> RegionInferenceContext<'tcx> {
     pub(crate) fn get_var_name_and_span_for_region(

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

@@ -6,9 +6,10 @@ pub use Ty::*;
 use rustc_ast::ptr::P;
 use rustc_ast::{self as ast, Expr, GenericArg, GenericParamKind, Generics, SelfKind};
 use rustc_expand::base::ExtCtxt;
-use rustc_span::source_map::{respan, DUMMY_SP};
+use rustc_span::source_map::respan;
 use rustc_span::symbol::{kw, Ident, Symbol};
 use rustc_span::Span;
+use rustc_span::DUMMY_SP;
 use thin_vec::ThinVec;
 
 /// A path, e.g., `::std::option::Option::<i32>` (global). Has support

compiler/rustc_codegen_llvm/src/context.rs

@@ -26,8 +26,8 @@ use rustc_middle::{bug, span_bug};
 use rustc_session::config::{BranchProtection, CFGuard, CFProtection};
 use rustc_session::config::{CrateType, DebugInfo, PAuthKey, PacRet};
 use rustc_session::Session;
-use rustc_span::source_map::Span;
 use rustc_span::source_map::Spanned;
+use rustc_span::Span;
 use rustc_target::abi::{
     call::FnAbi, HasDataLayout, PointeeInfo, Size, TargetDataLayout, VariantIdx,
 };

compiler/rustc_codegen_ssa/src/mir/block.rs

@@ -17,8 +17,7 @@ use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, ValidityRequirement};
 use rustc_middle::ty::print::{with_no_trimmed_paths, with_no_visible_paths};
 use rustc_middle::ty::{self, Instance, Ty};
 use rustc_session::config::OptLevel;
-use rustc_span::source_map::Span;
-use rustc_span::{sym, Symbol};
+use rustc_span::{sym, Span, Symbol};
 use rustc_target::abi::call::{ArgAbi, FnAbi, PassMode, Reg};
 use rustc_target::abi::{self, HasDataLayout, WrappingRange};
 use rustc_target::spec::abi::Abi;

compiler/rustc_codegen_ssa/src/mir/rvalue.rs

@@ -13,7 +13,7 @@ use rustc_middle::ty::cast::{CastTy, IntTy};
 use rustc_middle::ty::layout::{HasTyCtxt, LayoutOf, TyAndLayout};
 use rustc_middle::ty::{self, adjustment::PointerCoercion, Instance, Ty, TyCtxt};
 use rustc_session::config::OptLevel;
-use rustc_span::source_map::{Span, DUMMY_SP};
+use rustc_span::{Span, DUMMY_SP};
 use rustc_target::abi::{self, FIRST_VARIANT};
 
 impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {

compiler/rustc_const_eval/src/const_eval/eval_queries.rs

@@ -10,7 +10,7 @@ use rustc_middle::traits::Reveal;
 use rustc_middle::ty::layout::LayoutOf;
 use rustc_middle::ty::print::with_no_trimmed_paths;
 use rustc_middle::ty::{self, TyCtxt};
-use rustc_span::source_map::Span;
+use rustc_span::Span;
 use rustc_target::abi::{self, Abi};
 
 use super::{CanAccessStatics, CompileTimeEvalContext, CompileTimeInterpreter};