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Encode one level of cfg_attr in attr_id

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This commit is contained in:
Lukas Wirth 2023-01-09 20:47:51 +01:00
parent 68723043db
commit 621e96bd6a
11 changed files with 99 additions and 52 deletions
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2
crates/hir-def/src/attr.rs
View file

@ -546,7 +546,7 @@ impl AttrSourceMap {
}
fn source_of_id(&self, id: AttrId) -> InFile<&Either<ast::Attr, ast::Comment>> {
let ast_idx = id.ast_index as usize;
let ast_idx = id.ast_index();
let file_id = match self.mod_def_site_file_id {
Some((file_id, def_site_cut)) if def_site_cut <= ast_idx => file_id,
_ => self.file_id,

2
crates/hir-def/src/child_by_source.rs
View file

@ -117,7 +117,7 @@ impl ChildBySource for ItemScope {
let adt = ast_id.to_node(db.upcast());
calls.for_each(|(attr_id, call_id, calls)| {
if let Some(Either::Left(attr)) =
adt.doc_comments_and_attrs().nth(attr_id.ast_index as usize)
adt.doc_comments_and_attrs().nth(attr_id.ast_index())
{
res[keys::DERIVE_MACRO_CALL].insert(attr, (attr_id, call_id, calls.into()));
}

6
crates/hir-def/src/lib.rs
View file

@ -941,7 +941,7 @@ pub fn macro_id_to_def_id(db: &dyn db::DefDatabase, id: MacroId) -> MacroDefId {
fn derive_macro_as_call_id(
db: &dyn db::DefDatabase,
item_attr: &AstIdWithPath<ast::Adt>,
derive_attr: AttrId,
derive_attr_index: AttrId,
derive_pos: u32,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<(MacroId, MacroDefId)>,
@ -954,7 +954,7 @@ fn derive_macro_as_call_id(
MacroCallKind::Derive {
ast_id: item_attr.ast_id,
derive_index: derive_pos,
derive_attr_index: derive_attr.ast_index,
derive_attr_index,
},
);
Ok((macro_id, def_id, call_id))
@ -982,7 +982,7 @@ fn attr_macro_as_call_id(
MacroCallKind::Attr {
ast_id: item_attr.ast_id,
attr_args: Arc::new(arg),
invoc_attr_index: macro_attr.id.ast_index,
invoc_attr_index: macro_attr.id,
is_derive,
},
);

4
crates/hir-def/src/nameres/collector.rs
View file

@ -452,7 +452,7 @@ impl DefCollector<'_> {
MacroCallKind::Attr {
ast_id: ast_id.ast_id,
attr_args: Default::default(),
invoc_attr_index: attr.id.ast_index,
invoc_attr_index: attr.id,
is_derive: false,
},
attr.path().clone(),
@ -1407,7 +1407,7 @@ impl DefCollector<'_> {
directive.module_id,
MacroCallKind::Derive {
ast_id: ast_id.ast_id,
derive_attr_index: derive_attr.ast_index,
derive_attr_index: *derive_attr,
derive_index: *derive_pos as u32,
},
ast_id.path.clone(),

8
crates/hir-def/src/nameres/diagnostics.rs
View file

@ -31,9 +31,9 @@ pub enum DefDiagnosticKind {
UnimplementedBuiltinMacro { ast: AstId<ast::Macro> },
InvalidDeriveTarget { ast: AstId<ast::Item>, id: u32 },
InvalidDeriveTarget { ast: AstId<ast::Item>, id: usize },
MalformedDerive { ast: AstId<ast::Adt>, id: u32 },
MalformedDerive { ast: AstId<ast::Adt>, id: usize },
}
#[derive(Debug, PartialEq, Eq)]
@ -119,7 +119,7 @@ impl DefDiagnostic {
) -> Self {
Self {
in_module: container,
kind: DefDiagnosticKind::InvalidDeriveTarget { ast, id: id.ast_index },
kind: DefDiagnosticKind::InvalidDeriveTarget { ast, id: id.ast_index() },
}
}
@ -130,7 +130,7 @@ impl DefDiagnostic {
) -> Self {
Self {
in_module: container,
kind: DefDiagnosticKind::MalformedDerive { ast, id: id.ast_index },
kind: DefDiagnosticKind::MalformedDerive { ast, id: id.ast_index() },
}
}
}

79
crates/hir-expand/src/attrs.rs
View file

@ -1,3 +1,4 @@
//! A higher level attributes based on TokenTree, with also some shortcuts.
use std::{fmt, ops, sync::Arc};
use base_db::CrateId;
@ -65,14 +66,16 @@ impl RawAttrs {
(None, entries @ Some(_)) => Self { entries },
(Some(entries), None) => Self { entries: Some(entries.clone()) },
(Some(a), Some(b)) => {
let last_ast_index = a.last().map_or(0, |it| it.id.ast_index + 1);
let last_ast_index = a.last().map_or(0, |it| it.id.ast_index() + 1) as u32;
Self {
entries: Some(
a.iter()
.cloned()
.chain(b.iter().map(|it| {
let mut it = it.clone();
it.id.ast_index += last_ast_index;
it.id.id = it.id.ast_index() as u32 + last_ast_index
| (it.id.cfg_attr_index().unwrap_or(0) as u32)
<< AttrId::AST_INDEX_BITS;
it
}))
.collect(),
@ -83,6 +86,7 @@ impl RawAttrs {
}
/// Processes `cfg_attr`s, returning the resulting semantic `Attrs`.
// FIXME: This should return a different type
pub fn filter(self, db: &dyn AstDatabase, krate: CrateId) -> RawAttrs {
let has_cfg_attrs = self
.iter()
@ -106,27 +110,22 @@ impl RawAttrs {
_ => return smallvec![attr.clone()],
};
// Input subtree is: `(cfg, $(attr),+)`
// Split it up into a `cfg` subtree and the `attr` subtrees.
// FIXME: There should be a common API for this.
let mut parts = subtree.token_trees.split(|tt| {
matches!(tt, tt::TokenTree::Leaf(tt::Leaf::Punct(Punct { char: ',', .. })))
});
let cfg = match parts.next() {
let (cfg, parts) = match parse_cfg_attr_input(subtree) {
Some(it) => it,
None => return smallvec![],
None => return smallvec![attr.clone()],
};
let cfg = Subtree { delimiter: subtree.delimiter, token_trees: cfg.to_vec() };
let cfg = CfgExpr::parse(&cfg);
let index = attr.id;
let attrs = parts.filter(|a| !a.is_empty()).filter_map(|attr| {
let tree = Subtree { delimiter: None, token_trees: attr.to_vec() };
// FIXME hygiene
let hygiene = Hygiene::new_unhygienic();
Attr::from_tt(db, &tree, &hygiene, index)
});
let attrs =
parts.enumerate().take(1 << AttrId::CFG_ATTR_BITS).filter_map(|(idx, attr)| {
let tree = Subtree { delimiter: None, token_trees: attr.to_vec() };
// FIXME hygiene
let hygiene = Hygiene::new_unhygienic();
Attr::from_tt(db, &tree, &hygiene, index.with_cfg_attr(idx))
});
let cfg_options = &crate_graph[krate].cfg_options;
let cfg = Subtree { delimiter: subtree.delimiter, token_trees: cfg.to_vec() };
let cfg = CfgExpr::parse(&cfg);
if cfg_options.check(&cfg) == Some(false) {
smallvec![]
} else {
@ -143,7 +142,32 @@ impl RawAttrs {
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
pub struct AttrId {
pub ast_index: u32,
id: u32,
}
// FIXME: This only handles a single level of cfg_attr nesting
// that is `#[cfg_attr(all(), cfg_attr(all(), cfg(any())))]` breaks again
impl AttrId {
const CFG_ATTR_BITS: usize = 7;
const AST_INDEX_MASK: usize = 0x00FF_FFFF;
const AST_INDEX_BITS: usize = Self::AST_INDEX_MASK.count_ones() as usize;
const CFG_ATTR_SET_BITS: u32 = 1 << 31;
pub fn ast_index(&self) -> usize {
self.id as usize & Self::AST_INDEX_MASK
}
pub fn cfg_attr_index(&self) -> Option<usize> {
if self.id & Self::CFG_ATTR_SET_BITS == 0 {
None
} else {
Some(self.id as usize >> Self::AST_INDEX_BITS)
}
}
pub fn with_cfg_attr(self, idx: usize) -> AttrId {
AttrId { id: self.id | (idx as u32) << Self::AST_INDEX_BITS | Self::CFG_ATTR_SET_BITS }
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
@ -272,10 +296,7 @@ pub fn collect_attrs(
Either::Left(attr) => attr.kind().is_outer(),
Either::Right(comment) => comment.is_outer(),
});
outer_attrs
.chain(inner_attrs)
.enumerate()
.map(|(id, attr)| (AttrId { ast_index: id as u32 }, attr))
outer_attrs.chain(inner_attrs).enumerate().map(|(id, attr)| (AttrId { id: id as u32 }, attr))
}
fn inner_attributes(
@ -311,3 +332,15 @@ fn inner_attributes(
});
Some(attrs)
}
// Input subtree is: `(cfg, $(attr),+)`
// Split it up into a `cfg` subtree and the `attr` subtrees.
pub fn parse_cfg_attr_input(
subtree: &Subtree,
) -> Option<(&[tt::TokenTree], impl Iterator<Item = &[tt::TokenTree]>)> {
let mut parts = subtree
.token_trees
.split(|tt| matches!(tt, tt::TokenTree::Leaf(tt::Leaf::Punct(Punct { char: ',', .. }))));
let cfg = parts.next()?;
Some((cfg, parts.filter(|it| !it.is_empty())))
}

9
crates/hir-expand/src/db.rs
View file

@ -168,7 +168,9 @@ pub fn expand_speculative(
// Attributes may have an input token tree, build the subtree and map for this as well
// then try finding a token id for our token if it is inside this input subtree.
let item = ast::Item::cast(speculative_args.clone())?;
item.doc_comments_and_attrs().nth(invoc_attr_index as usize).and_then(Either::left)
item.doc_comments_and_attrs()
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)
}?;
match attr.token_tree() {
Some(token_tree) => {
@ -321,6 +323,7 @@ fn macro_arg(
}
fn censor_for_macro_input(loc: &MacroCallLoc, node: &SyntaxNode) -> FxHashSet<SyntaxNode> {
// FIXME: handle `cfg_attr`
(|| {
let censor = match loc.kind {
MacroCallKind::FnLike { .. } => return None,
@ -328,7 +331,7 @@ fn censor_for_macro_input(loc: &MacroCallLoc, node: &SyntaxNode) -> FxHashSet<Sy
cov_mark::hit!(derive_censoring);
ast::Item::cast(node.clone())?
.attrs()
.take(derive_attr_index as usize + 1)
.take(derive_attr_index.ast_index() + 1)
// FIXME, this resolution should not be done syntactically
// derive is a proper macro now, no longer builtin
// But we do not have resolution at this stage, this means
@ -343,7 +346,7 @@ fn censor_for_macro_input(loc: &MacroCallLoc, node: &SyntaxNode) -> FxHashSet<Sy
cov_mark::hit!(attribute_macro_attr_censoring);
ast::Item::cast(node.clone())?
.doc_comments_and_attrs()
.nth(invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)
.map(|attr| attr.syntax().clone())
.into_iter()

2
crates/hir-expand/src/hygiene.rs
View file

@ -191,7 +191,7 @@ fn make_hygiene_info(
let tt = ast_id
.to_node(db)
.doc_comments_and_attrs()
.nth(invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)?
.token_tree()?;
Some(InFile::new(ast_id.file_id, tt))

24
crates/hir-expand/src/lib.rs
View file

@ -38,6 +38,7 @@ use syntax::{
use crate::{
ast_id_map::FileAstId,
attrs::AttrId,
builtin_attr_macro::BuiltinAttrExpander,
builtin_derive_macro::BuiltinDeriveExpander,
builtin_fn_macro::{BuiltinFnLikeExpander, EagerExpander},
@ -146,7 +147,7 @@ pub enum MacroCallKind {
///
/// Outer attributes are counted first, then inner attributes. This does not support
/// out-of-line modules, which may have attributes spread across 2 files!
derive_attr_index: u32,
derive_attr_index: AttrId,
/// Index of the derive macro in the derive attribute
derive_index: u32,
},
@ -157,7 +158,7 @@ pub enum MacroCallKind {
///
/// Outer attributes are counted first, then inner attributes. This does not support
/// out-of-line modules, which may have attributes spread across 2 files!
invoc_attr_index: u32,
invoc_attr_index: AttrId,
/// Whether this attribute is the `#[derive]` attribute.
is_derive: bool,
},
@ -262,10 +263,11 @@ impl HirFileId {
});
let attr_input_or_mac_def = def.or_else(|| match loc.kind {
MacroCallKind::Attr { ast_id, invoc_attr_index, .. } => {
// FIXME: handle `cfg_attr`
let tt = ast_id
.to_node(db)
.doc_comments_and_attrs()
.nth(invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)?
.token_tree()?;
Some(InFile::new(ast_id.file_id, tt))
@ -398,8 +400,7 @@ impl MacroDefId {
}
}
// FIXME: attribute indices do not account for `cfg_attr`, which means that we'll strip the whole
// `cfg_attr` instead of just one of the attributes it expands to
// FIXME: attribute indices do not account for nested `cfg_attr`
impl MacroCallKind {
/// Returns the file containing the macro invocation.
@ -420,7 +421,7 @@ impl MacroCallKind {
// FIXME: handle `cfg_attr`
ast_id.with_value(ast_id.to_node(db)).map(|it| {
it.doc_comments_and_attrs()
.nth(*derive_attr_index as usize)
.nth(derive_attr_index.ast_index())
.and_then(|it| match it {
Either::Left(attr) => Some(attr.syntax().clone()),
Either::Right(_) => None,
@ -432,7 +433,7 @@ impl MacroCallKind {
// FIXME: handle `cfg_attr`
ast_id.with_value(ast_id.to_node(db)).map(|it| {
it.doc_comments_and_attrs()
.nth(*invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.and_then(|it| match it {
Either::Left(attr) => Some(attr.syntax().clone()),
Either::Right(_) => None,
@ -489,19 +490,21 @@ impl MacroCallKind {
MacroCallKind::FnLike { ast_id, .. } => ast_id.to_node(db).syntax().text_range(),
MacroCallKind::Derive { ast_id, derive_attr_index, .. } => {
// FIXME: should be the range of the macro name, not the whole derive
// FIXME: handle `cfg_attr`
ast_id
.to_node(db)
.doc_comments_and_attrs()
.nth(derive_attr_index as usize)
.nth(derive_attr_index.ast_index())
.expect("missing derive")
.expect_left("derive is a doc comment?")
.syntax()
.text_range()
}
// FIXME: handle `cfg_attr`
MacroCallKind::Attr { ast_id, invoc_attr_index, .. } => ast_id
.to_node(db)
.doc_comments_and_attrs()
.nth(invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.expect("missing attribute")
.expect_left("attribute macro is a doc comment?")
.syntax()
@ -593,9 +596,10 @@ impl ExpansionInfo {
let token_range = token.value.text_range();
match &loc.kind {
MacroCallKind::Attr { attr_args, invoc_attr_index, is_derive, .. } => {
// FIXME: handle `cfg_attr`
let attr = item
.doc_comments_and_attrs()
.nth(*invoc_attr_index as usize)
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)?;
match attr.token_tree() {
Some(token_tree)

8
crates/hir/src/lib.rs
View file

@ -785,7 +785,7 @@ fn precise_macro_call_location(
let token = (|| {
let derive_attr = node
.doc_comments_and_attrs()
.nth(*derive_attr_index as usize)
.nth(derive_attr_index.ast_index())
.and_then(Either::left)?;
let token_tree = derive_attr.meta()?.token_tree()?;
let group_by = token_tree
@ -813,9 +813,11 @@ fn precise_macro_call_location(
let node = ast_id.to_node(db.upcast());
let attr = node
.doc_comments_and_attrs()
.nth((*invoc_attr_index) as usize)
.nth(invoc_attr_index.ast_index())
.and_then(Either::left)
.unwrap_or_else(|| panic!("cannot find attribute #{invoc_attr_index}"));
.unwrap_or_else(|| {
panic!("cannot find attribute #{}", invoc_attr_index.ast_index())
});
(
ast_id.with_value(SyntaxNodePtr::from(AstPtr::new(&attr))),

7
crates/intern/Cargo.toml
View file

@ -1,9 +1,14 @@
[package]
name = "intern"
version = "0.0.0"
description = "TBD"
license = "MIT OR Apache-2.0"
edition = "2021"
rust-version = "1.65"
[lib]
doctest = false
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
# We need to freeze the version of the crate, as the raw-api feature is considered unstable