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Unify attributes retrieval for JSON and HTML rendering

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This commit is contained in:
Guillaume Gomez 2023-04-29 23:36:48 +02:00
parent 2693e20aa3
commit b778688f91
3 changed files with 76 additions and 79 deletions
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75
src/librustdoc/html/render/mod.rs
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@ -48,7 +48,6 @@ use std::str;
use std::string::ToString;
use askama::Template;
use rustc_ast_pretty::pprust;
use rustc_attr::{ConstStability, Deprecation, StabilityLevel};
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
@ -1021,76 +1020,6 @@ fn render_assoc_item(
}
}
const ALLOWED_ATTRIBUTES: &[Symbol] =
&[sym::export_name, sym::link_section, sym::no_mangle, sym::repr, sym::non_exhaustive];
fn attributes(it: &clean::Item, tcx: TyCtxt<'_>) -> Vec<String> {
use rustc_abi::IntegerType;
use rustc_middle::ty::ReprFlags;
let mut attrs: Vec<String> = it
.attrs
.other_attrs
.iter()
.filter_map(|attr| {
if ALLOWED_ATTRIBUTES.contains(&attr.name_or_empty()) {
Some(
pprust::attribute_to_string(attr)
.replace("\\\n", "")
.replace('\n', "")
.replace(" ", " "),
)
} else {
None
}
})
.collect();
if let Some(def_id) = it.item_id.as_def_id() &&
!def_id.is_local() &&
// This check is needed because `adt_def` will panic if not a compatible type otherwise...
matches!(it.type_(), ItemType::Struct | ItemType::Enum | ItemType::Union)
{
let repr = tcx.adt_def(def_id).repr();
let mut out = Vec::new();
if repr.flags.contains(ReprFlags::IS_C) {
out.push("C");
}
if repr.flags.contains(ReprFlags::IS_TRANSPARENT) {
out.push("transparent");
}
if repr.flags.contains(ReprFlags::IS_SIMD) {
out.push("simd");
}
let pack_s;
if let Some(pack) = repr.pack {
pack_s = format!("packed({})", pack.bytes());
out.push(&pack_s);
}
let align_s;
if let Some(align) = repr.align {
align_s = format!("align({})", align.bytes());
out.push(&align_s);
}
let int_s;
if let Some(int) = repr.int {
int_s = match int {
IntegerType::Pointer(is_signed) => {
format!("{}size", if is_signed { 'i' } else { 'u' })
}
IntegerType::Fixed(size, is_signed) => {
format!("{}{}", if is_signed { 'i' } else { 'u' }, size.size().bytes() * 8)
}
};
out.push(&int_s);
}
if out.is_empty() {
return Vec::new();
}
attrs.push(format!("#[repr({})]", out.join(", ")));
}
attrs
}
// When an attribute is rendered inside a `<pre>` tag, it is formatted using
// a whitespace prefix and newline.
fn render_attributes_in_pre<'a, 'b: 'a>(
@ -1099,7 +1028,7 @@ fn render_attributes_in_pre<'a, 'b: 'a>(
tcx: TyCtxt<'b>,
) -> impl fmt::Display + Captures<'a> + Captures<'b> {
crate::html::format::display_fn(move |f| {
for a in attributes(it, tcx) {
for a in it.attributes(tcx, false) {
writeln!(f, "{}{}", prefix, a)?;
}
Ok(())
@ -1109,7 +1038,7 @@ fn render_attributes_in_pre<'a, 'b: 'a>(
// When an attribute is rendered inside a <code> tag, it is formatted using
// a div to produce a newline after it.
fn render_attributes_in_code(w: &mut Buffer, it: &clean::Item, tcx: TyCtxt<'_>) {
for a in attributes(it, tcx) {
for a in it.attributes(tcx, false) {
write!(w, "<div class=\"code-attribute\">{}</div>", a);
}
}