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Support RFC 2396

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AKA. target_feature 1.1, or non unsafe target_feature.
This commit is contained in:
Chayim Refael Friedman 2025-01-26 23:31:58 +02:00
parent 2df4ecfc74
commit 791b1ebfd4
14 changed files with 132 additions and 24 deletions
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8
crates/hir-def/src/data.rs
View file

@ -101,6 +101,10 @@ impl FunctionData {
flags.remove(FnFlags::HAS_UNSAFE_KW);
}
if attrs.by_key(&sym::target_feature).exists() {
flags.insert(FnFlags::HAS_TARGET_FEATURE);
}
Arc::new(FunctionData {
name: func.name.clone(),
params: func
@ -155,6 +159,10 @@ impl FunctionData {
pub fn is_varargs(&self) -> bool {
self.flags.contains(FnFlags::IS_VARARGS)
}
pub fn has_target_feature(&self) -> bool {
self.flags.contains(FnFlags::HAS_TARGET_FEATURE)
}
}
fn parse_rustc_legacy_const_generics(tt: &crate::tt::TopSubtree) -> Box<[u32]> {

7
crates/hir-def/src/item_tree.rs
View file

@ -937,7 +937,7 @@ pub struct Param {
bitflags::bitflags! {
#[derive(Debug, Clone, Copy, Eq, PartialEq, Default)]
pub(crate) struct FnFlags: u8 {
pub(crate) struct FnFlags: u16 {
const HAS_SELF_PARAM = 1 << 0;
const HAS_BODY = 1 << 1;
const HAS_DEFAULT_KW = 1 << 2;
@ -946,6 +946,11 @@ bitflags::bitflags! {
const HAS_UNSAFE_KW = 1 << 5;
const IS_VARARGS = 1 << 6;
const HAS_SAFE_KW = 1 << 7;
/// The `#[target_feature]` attribute is necessary to check safety (with RFC 2396),
/// but keeping it for all functions will consume a lot of memory when there are
/// only very few functions with it. So we only encode its existence here, and lookup
/// it if needed.
const HAS_TARGET_FEATURE = 1 << 8;
}
}