Replace &mut DiagnosticBuilder, in signatures, with &mut Diagnostic.

compiler/rustc_parse/src/parser/attr.rs

@@ -3,7 +3,7 @@ use rustc_ast as ast;
 use rustc_ast::attr;
 use rustc_ast::token::{self, Nonterminal};
 use rustc_ast_pretty::pprust;
-use rustc_errors::{error_code, DiagnosticBuilder, PResult};
+use rustc_errors::{error_code, Diagnostic, PResult};
 use rustc_span::{sym, BytePos, Span};
 use std::convert::TryInto;
 
@@ -147,7 +147,7 @@ impl<'a> Parser<'a> {
 
     fn annotate_following_item_if_applicable(
         &self,
-        err: &mut DiagnosticBuilder<'_>,
+        err: &mut Diagnostic,
         span: Span,
         attr_type: OuterAttributeType,
     ) -> Option<Span> {

compiler/rustc_parse/src/parser/diagnostics.rs

@@ -16,7 +16,7 @@ use rustc_ast::{
 };
 use rustc_ast_pretty::pprust;
 use rustc_data_structures::fx::FxHashSet;
-use rustc_errors::{pluralize, struct_span_err};
+use rustc_errors::{pluralize, struct_span_err, Diagnostic};
 use rustc_errors::{Applicability, DiagnosticBuilder, Handler, PResult};
 use rustc_span::source_map::Spanned;
 use rustc_span::symbol::{kw, Ident};
@@ -393,7 +393,7 @@ impl<'a> Parser<'a> {
         Err(err)
     }
 
-    fn check_too_many_raw_str_terminators(&mut self, err: &mut DiagnosticBuilder<'_>) -> bool {
+    fn check_too_many_raw_str_terminators(&mut self, err: &mut Diagnostic) -> bool {
         match (&self.prev_token.kind, &self.token.kind) {
             (
                 TokenKind::Literal(Lit {
@@ -483,7 +483,7 @@ impl<'a> Parser<'a> {
 
     pub fn maybe_annotate_with_ascription(
         &mut self,
-        err: &mut DiagnosticBuilder<'_>,
+        err: &mut Diagnostic,
         maybe_expected_semicolon: bool,
     ) {
         if let Some((sp, likely_path)) = self.last_type_ascription.take() {
@@ -767,7 +767,7 @@ impl<'a> Parser<'a> {
     /// parenthesising the leftmost comparison.
     fn attempt_chained_comparison_suggestion(
         &mut self,
-        err: &mut DiagnosticBuilder<'_>,
+        err: &mut Diagnostic,
         inner_op: &Expr,
         outer_op: &Spanned<AssocOp>,
     ) -> bool /* advanced the cursor */ {
@@ -890,7 +890,7 @@ impl<'a> Parser<'a> {
                     "comparison operators cannot be chained",
                 );
 
-                let suggest = |err: &mut DiagnosticBuilder<'_>| {
+                let suggest = |err: &mut Diagnostic| {
                     err.span_suggestion_verbose(
                         op.span.shrink_to_lo(),
                         TURBOFISH_SUGGESTION_STR,
@@ -1637,7 +1637,7 @@ impl<'a> Parser<'a> {
 
     pub(super) fn parameter_without_type(
         &mut self,
-        err: &mut DiagnosticBuilder<'_>,
+        err: &mut Diagnostic,
         pat: P<ast::Pat>,
         require_name: bool,
         first_param: bool,

compiler/rustc_parse/src/parser/expr.rs

@@ -17,7 +17,7 @@ use rustc_ast::{self as ast, AttrStyle, AttrVec, CaptureBy, ExprField, Lit, UnOp
 use rustc_ast::{AnonConst, BinOp, BinOpKind, FnDecl, FnRetTy, MacCall, Param, Ty, TyKind};
 use rustc_ast::{Arm, Async, BlockCheckMode, Expr, ExprKind, Label, Movability, RangeLimits};
 use rustc_ast_pretty::pprust;
-use rustc_errors::{Applicability, DiagnosticBuilder, PResult};
+use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder, PResult};
 use rustc_session::lint::builtin::BREAK_WITH_LABEL_AND_LOOP;
 use rustc_session::lint::BuiltinLintDiagnostics;
 use rustc_span::edition::LATEST_STABLE_EDITION;
@@ -2653,7 +2653,7 @@ impl<'a> Parser<'a> {
         let mut base = ast::StructRest::None;
         let mut recover_async = false;
 
-        let mut async_block_err = |e: &mut DiagnosticBuilder<'_>, span: Span| {
+        let mut async_block_err = |e: &mut Diagnostic, span: Span| {
             recover_async = true;
             e.span_label(span, "`async` blocks are only allowed in Rust 2018 or later");
             e.help(&format!("set `edition = \"{}\"` in `Cargo.toml`", LATEST_STABLE_EDITION));