Rollup merge of #124214 - carbotaniuman:parse_unsafe_attrs, r=michaelwoerister

Parse unsafe attributes

Initial parse implementation for #123757

This is the initial work to parse unsafe attributes, which is represented as an extra `unsafety` field in `MetaItem` and `AttrItem`. There's two areas in the code where it appears that parsing is done manually and not using the parser stuff, and I'm not sure how I'm supposed to thread the change there.

1 files changed, 9 insertions, 2 deletions

diff --git a/compiler/rustc_ast_pretty/src/pprust/state.rs b/compiler/rustc_ast_pretty/src/pprust/state.rs
index ca26b436b82..f32b63a39f0 100644
--- a/compiler/rustc_ast_pretty/src/pprust/state.rs
+++ b/compiler/rustc_ast_pretty/src/pprust/state.rs
@@ -16,7 +16,7 @@ use rustc_ast::token::{self, BinOpToken, CommentKind, Delimiter, Nonterminal, To
 use rustc_ast::tokenstream::{Spacing, TokenStream, TokenTree};
 use rustc_ast::util::classify;
 use rustc_ast::util::comments::{Comment, CommentStyle};
-use rustc_ast::{self as ast, AttrArgs, AttrArgsEq, BlockCheckMode, PatKind};
+use rustc_ast::{self as ast, AttrArgs, AttrArgsEq, BlockCheckMode, PatKind, Safety};
 use rustc_ast::{attr, BindingMode, ByRef, DelimArgs, RangeEnd, RangeSyntax, Term};
 use rustc_ast::{GenericArg, GenericBound, SelfKind};
 use rustc_ast::{InlineAsmOperand, InlineAsmRegOrRegClass};
@@ -249,6 +249,7 @@ pub fn print_crate<'a>(
         let fake_attr = attr::mk_attr_nested_word(
             g,
             ast::AttrStyle::Inner,
+            Safety::Default,
             sym::feature,
             sym::prelude_import,
             DUMMY_SP,
@@ -259,7 +260,13 @@ pub fn print_crate<'a>(
         // root, so this is not needed, and actually breaks things.
         if edition.is_rust_2015() {
             // `#![no_std]`
-            let fake_attr = attr::mk_attr_word(g, ast::AttrStyle::Inner, sym::no_std, DUMMY_SP);
+            let fake_attr = attr::mk_attr_word(
+                g,
+                ast::AttrStyle::Inner,
+                Safety::Default,
+                sym::no_std,
+                DUMMY_SP,
+            );
             s.print_attribute(&fake_attr);
         }
     }