rustc_attr_parsing/attributes/diagnostic/
on_move.rs

1use rustc_feature::template;
2use rustc_hir::attrs::AttributeKind;
3use rustc_span::sym;
4
5use crate::attributes::diagnostic::*;
6use crate::attributes::prelude::*;
7use crate::context::{AcceptContext, Stage};
8use crate::parser::ArgParser;
9use crate::target_checking::{ALL_TARGETS, AllowedTargets};
10
11#[derive(#[automatically_derived]
impl ::core::default::Default for OnMoveParser {
    #[inline]
    fn default() -> OnMoveParser {
        OnMoveParser {
            span: ::core::default::Default::default(),
            directive: ::core::default::Default::default(),
        }
    }
}Default)]
12pub(crate) struct OnMoveParser {
13    span: Option<Span>,
14    directive: Option<(Span, Directive)>,
15}
16
17impl OnMoveParser {
18    fn parse<'sess, S: Stage>(
19        &mut self,
20        cx: &mut AcceptContext<'_, 'sess, S>,
21        args: &ArgParser,
22        mode: Mode,
23    ) {
24        if !cx.features().diagnostic_on_move() {
25            // `UnknownDiagnosticAttribute` is emitted in rustc_resolve/macros.rs
26            return;
27        }
28
29        let span = cx.attr_span;
30        self.span = Some(span);
31
32        let Some(items) = parse_list(cx, args, mode) else { return };
33
34        if let Some(directive) = parse_directive_items(cx, mode, items.mixed(), true) {
35            merge_directives(cx, &mut self.directive, (span, directive));
36        }
37    }
38}
39impl<S: Stage> AttributeParser<S> for OnMoveParser {
40    const ATTRIBUTES: AcceptMapping<Self, S> = &[(
41        &[sym::diagnostic, sym::on_move],
42        ::rustc_feature::AttributeTemplate {
    word: false,
    list: Some(&[r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#]),
    one_of: &[],
    name_value_str: None,
    docs: None,
}template!(List: &[r#"/*opt*/ message = "...", /*opt*/ label = "...", /*opt*/ note = "...""#]),
43        |this, cx, args| {
44            this.parse(cx, args, Mode::DiagnosticOnMove);
45        },
46    )];
47    const ALLOWED_TARGETS: AllowedTargets = AllowedTargets::AllowList(ALL_TARGETS);
48
49    fn finalize(self, _cx: &FinalizeContext<'_, '_, S>) -> Option<AttributeKind> {
50        if let Some(span) = self.span {
51            Some(AttributeKind::OnMove { span, directive: self.directive.map(|d| Box::new(d.1)) })
52        } else {
53            None
54        }
55    }
56}
rustc_attr_parsing/attributes/diagnostic/on_move.rs

rustc_attr_parsing/attributes/diagnostic/
on_move.rs
