Port #[link_ordinal] to the new attribute parsing infrastructure.

Author: Periodic1911

compiler/rustc_attr_parsing/src/attributes/link_attrs.rs

@@ -7,8 +7,9 @@ use rustc_span::{Symbol, sym};
 use crate::attributes::{AttributeOrder, OnDuplicate, SingleAttributeParser};
 use crate::context::{AcceptContext, Stage};
 use crate::parser::ArgParser;
-use crate::session_diagnostics::{InvalidLinkOrdinalFormat, LinkOrdinalOutOfRange};
-use crate::session_diagnostics::NullOnLinkSection;
+use crate::session_diagnostics::{
+    InvalidLinkOrdinalFormat, LinkOrdinalOutOfRange, NullOnLinkSection,
+};
 
 pub(crate) struct LinkNameParser;
 

compiler/rustc_attr_parsing/src/context.rs

@@ -22,8 +22,8 @@ use crate::attributes::codegen_attrs::{
 use crate::attributes::confusables::ConfusablesParser;
 use crate::attributes::deprecation::DeprecationParser;
 use crate::attributes::inline::{InlineParser, RustcForceInlineParser};
-use crate::attributes::link_attrs::{LinkNameParser, LinkSectionParser, LinkOrdinalParser};
-use crate::attributes::lint_helpers::{AsPtrParser, PubTransparentParser, PassByValueParser};
+use crate::attributes::link_attrs::{LinkNameParser, LinkOrdinalParser, LinkSectionParser};
+use crate::attributes::lint_helpers::{AsPtrParser, PassByValueParser, PubTransparentParser};
 use crate::attributes::loop_match::{ConstContinueParser, LoopMatchParser};
 use crate::attributes::must_use::MustUseParser;
 use crate::attributes::no_implicit_prelude::NoImplicitPreludeParser;

compiler/rustc_parse/src/validate_attr.rs

@@ -307,6 +307,7 @@ fn emit_malformed_attribute(
             | sym::ignore
             | sym::must_use
             | sym::track_caller
+            | sym::link_ordinal
             | sym::link_name
             | sym::export_name
             | sym::rustc_macro_transparency

tests/ui/attributes/malformed-attrs.stderr

@@ -146,12 +146,6 @@ error: malformed `ffi_pure` attribute input
 LL |     #[unsafe(ffi_pure = 1)]
    |     ^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[ffi_pure]`
 
-error: malformed `link_ordinal` attribute input
-  --> $DIR/malformed-attrs.rs:167:5
-   |
-LL |     #[link_ordinal]
-   |     ^^^^^^^^^^^^^^^ help: must be of the form: `#[link_ordinal(ordinal)]`
-
 error: malformed `ffi_const` attribute input
   --> $DIR/malformed-attrs.rs:171:5
    |
@@ -537,6 +531,15 @@ LL | #[rustc_layout_scalar_valid_range_end]
    | expected this to be a list
    | help: must be of the form: `#[rustc_layout_scalar_valid_range_end(end)]`
 
+error[E0539]: malformed `link_ordinal` attribute input
+  --> $DIR/malformed-attrs.rs:167:5
+   |
+LL |     #[link_ordinal]
+   |     ^^^^^^^^^^^^^^^
+   |     |
+   |     expected this to be a list
+   |     help: must be of the form: `#[link_ordinal(ordinal)]`
+
 error[E0565]: malformed `non_exhaustive` attribute input
   --> $DIR/malformed-attrs.rs:197:1
    |