Port #[no_implicit_prelude] to the new attribute parsing infrastructure

Signed-off-by: Jonathan Brouwer <jonathantbrouwer@gmail.com>

compiler/rustc_attr_parsing/src/attributes/mod.rs

@@ -35,6 +35,7 @@ pub(crate) mod link_attrs;
 pub(crate) mod lint_helpers;
 pub(crate) mod loop_match;
 pub(crate) mod must_use;
+pub(crate) mod no_implicit_prelude;
 pub(crate) mod repr;
 pub(crate) mod rustc_internal;
 pub(crate) mod semantics;

compiler/rustc_attr_parsing/src/attributes/no_implicit_prelude.rs

@@ -0,0 +1,13 @@
+use rustc_attr_data_structures::AttributeKind;
+use rustc_span::{Span, sym};
+
+use crate::attributes::{NoArgsAttributeParser, OnDuplicate};
+use crate::context::Stage;
+
+pub(crate) struct NoImplicitPreludeParser;
+
+impl<S: Stage> NoArgsAttributeParser<S> for NoImplicitPreludeParser {
+    const PATH: &[rustc_span::Symbol] = &[sym::no_implicit_prelude];
+    const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
+    const CREATE: fn(Span) -> AttributeKind = AttributeKind::NoImplicitPrelude;
+}

compiler/rustc_attr_parsing/src/context.rs

@@ -26,6 +26,7 @@ use crate::attributes::link_attrs::{LinkNameParser, LinkSectionParser};
 use crate::attributes::lint_helpers::{AsPtrParser, PubTransparentParser};
 use crate::attributes::loop_match::{ConstContinueParser, LoopMatchParser};
 use crate::attributes::must_use::MustUseParser;
+use crate::attributes::no_implicit_prelude::NoImplicitPreludeParser;
 use crate::attributes::repr::{AlignParser, ReprParser};
 use crate::attributes::rustc_internal::{
     RustcLayoutScalarValidRangeEnd, RustcLayoutScalarValidRangeStart,
@@ -141,6 +142,7 @@ attribute_parsers!(
         Single<WithoutArgs<ConstStabilityIndirectParser>>,
         Single<WithoutArgs<LoopMatchParser>>,
         Single<WithoutArgs<MayDangleParser>>,
+        Single<WithoutArgs<NoImplicitPreludeParser>>,
         Single<WithoutArgs<NoMangleParser>>,
         Single<WithoutArgs<PubTransparentParser>>,
         Single<WithoutArgs<TrackCallerParser>>,