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use rustc_attr_data_structures::{AttributeKind, OptimizeAttr};
use rustc_feature::{AttributeTemplate, template};
use rustc_span::sym;
use super::{AttributeOrder, OnDuplicate, SingleAttributeParser};
use crate::context::{AcceptContext, Stage};
use crate::parser::ArgParser;
pub(crate) struct OptimizeParser;
impl<S: Stage> SingleAttributeParser<S> for OptimizeParser {
const PATH: &[rustc_span::Symbol] = &[sym::optimize];
const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepLast;
const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::WarnButFutureError;
const TEMPLATE: AttributeTemplate = template!(List: "size|speed|none");
fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
let Some(list) = args.list() else {
cx.expected_list(cx.attr_span);
return None;
};
let Some(single) = list.single() else {
cx.expected_single_argument(list.span);
return None;
};
let res = match single.meta_item().and_then(|i| i.path().word().map(|i| i.name)) {
Some(sym::size) => OptimizeAttr::Size,
Some(sym::speed) => OptimizeAttr::Speed,
Some(sym::none) => OptimizeAttr::DoNotOptimize,
_ => {
cx.expected_specific_argument(single.span(), vec!["size", "speed", "none"]);
OptimizeAttr::Default
}
};
Some(AttributeKind::Optimize(res, cx.attr_span))
}
}
pub(crate) struct ColdParser;
impl<S: Stage> SingleAttributeParser<S> for ColdParser {
const PATH: &[rustc_span::Symbol] = &[sym::cold];
const ATTRIBUTE_ORDER: AttributeOrder = AttributeOrder::KeepLast;
const ON_DUPLICATE: OnDuplicate<S> = OnDuplicate::Warn;
const TEMPLATE: AttributeTemplate = template!(Word);
fn convert(cx: &mut AcceptContext<'_, '_, S>, args: &ArgParser<'_>) -> Option<AttributeKind> {
if !args.no_args() {
cx.expected_no_args(args.span().unwrap_or(cx.attr_span));
return None;
};
Some(AttributeKind::Cold(cx.attr_span))
}
}
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