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expand: Stop using artificial ast::Item for macros loaded from metadata

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This commit is contained in:
Vadim Petrochenkov 2024-10-26 18:51:15 +03:00
parent 9260be36b2
commit b93a2dd0ef
8 changed files with 94 additions and 120 deletions
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98
compiler/rustc_expand/src/mbe/macro_rules.rs
View File

@ -3,12 +3,11 @@ use std::collections::hash_map::Entry;
use std::{mem, slice};
use ast::token::IdentIsRaw;
use rustc_ast as ast;
use rustc_ast::token::NtPatKind::*;
use rustc_ast::token::TokenKind::*;
use rustc_ast::token::{self, Delimiter, NonterminalKind, Token, TokenKind};
use rustc_ast::tokenstream::{DelimSpan, TokenStream};
use rustc_ast::{DUMMY_NODE_ID, NodeId};
use rustc_ast::{self as ast, DUMMY_NODE_ID, NodeId};
use rustc_ast_pretty::pprust;
use rustc_attr::{self as attr, TransparencyError};
use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
@ -370,34 +369,32 @@ pub(super) fn try_match_macro<'matcher, T: Tracker<'matcher>>(
pub fn compile_declarative_macro(
sess: &Session,
features: &Features,
def: &ast::Item,
macro_def: &ast::MacroDef,
ident: Ident,
attrs: &[ast::Attribute],
span: Span,
node_id: NodeId,
edition: Edition,
) -> (SyntaxExtension, Vec<(usize, Span)>) {
debug!("compile_declarative_macro: {:?}", def);
let mk_syn_ext = |expander| {
SyntaxExtension::new(
sess,
features,
SyntaxExtensionKind::LegacyBang(expander),
def.span,
span,
Vec::new(),
edition,
def.ident.name,
&def.attrs,
def.id != DUMMY_NODE_ID,
ident.name,
attrs,
node_id != DUMMY_NODE_ID,
)
};
let dummy_syn_ext = |guar| (mk_syn_ext(Box::new(DummyExpander(guar))), Vec::new());
let dcx = sess.dcx();
let lhs_nm = Ident::new(sym::lhs, def.span);
let rhs_nm = Ident::new(sym::rhs, def.span);
let lhs_nm = Ident::new(sym::lhs, span);
let rhs_nm = Ident::new(sym::rhs, span);
let tt_spec = Some(NonterminalKind::TT);
let macro_def = match &def.kind {
ast::ItemKind::MacroDef(def) => def,
_ => unreachable!(),
};
let macro_rules = macro_def.macro_rules;
// Parse the macro_rules! invocation
@ -410,25 +407,22 @@ pub fn compile_declarative_macro(
let argument_gram = vec![
mbe::TokenTree::Sequence(DelimSpan::dummy(), mbe::SequenceRepetition {
tts: vec![
mbe::TokenTree::MetaVarDecl(def.span, lhs_nm, tt_spec),
mbe::TokenTree::token(token::FatArrow, def.span),
mbe::TokenTree::MetaVarDecl(def.span, rhs_nm, tt_spec),
mbe::TokenTree::MetaVarDecl(span, lhs_nm, tt_spec),
mbe::TokenTree::token(token::FatArrow, span),
mbe::TokenTree::MetaVarDecl(span, rhs_nm, tt_spec),
],
separator: Some(Token::new(
if macro_rules { token::Semi } else { token::Comma },
def.span,
)),
kleene: mbe::KleeneToken::new(mbe::KleeneOp::OneOrMore, def.span),
separator: Some(Token::new(if macro_rules { token::Semi } else { token::Comma }, span)),
kleene: mbe::KleeneToken::new(mbe::KleeneOp::OneOrMore, span),
num_captures: 2,
}),
// to phase into semicolon-termination instead of semicolon-separation
mbe::TokenTree::Sequence(DelimSpan::dummy(), mbe::SequenceRepetition {
tts: vec![mbe::TokenTree::token(
if macro_rules { token::Semi } else { token::Comma },
def.span,
span,
)],
separator: None,
kleene: mbe::KleeneToken::new(mbe::KleeneOp::ZeroOrMore, def.span),
kleene: mbe::KleeneToken::new(mbe::KleeneOp::ZeroOrMore, span),
num_captures: 0,
}),
];
@ -460,7 +454,7 @@ pub fn compile_declarative_macro(
};
let s = parse_failure_msg(&token, track.get_expected_token());
let sp = token.span.substitute_dummy(def.span);
let sp = token.span.substitute_dummy(span);
let mut err = sess.dcx().struct_span_err(sp, s);
err.span_label(sp, msg);
annotate_doc_comment(&mut err, sess.source_map(), sp);
@ -468,7 +462,7 @@ pub fn compile_declarative_macro(
return dummy_syn_ext(guar);
}
Error(sp, msg) => {
let guar = sess.dcx().span_err(sp.substitute_dummy(def.span), msg);
let guar = sess.dcx().span_err(sp.substitute_dummy(span), msg);
return dummy_syn_ext(guar);
}
ErrorReported(guar) => {
@ -489,7 +483,7 @@ pub fn compile_declarative_macro(
&TokenStream::new(vec![tt.clone()]),
true,
sess,
def.id,
node_id,
features,
edition,
)
@ -497,13 +491,13 @@ pub fn compile_declarative_macro(
.unwrap();
// We don't handle errors here, the driver will abort
// after parsing/expansion. We can report every error in every macro this way.
check_emission(check_lhs_nt_follows(sess, def, &tt));
check_emission(check_lhs_nt_follows(sess, node_id, &tt));
return tt;
}
sess.dcx().span_bug(def.span, "wrong-structured lhs")
sess.dcx().span_bug(span, "wrong-structured lhs")
})
.collect::<Vec<mbe::TokenTree>>(),
_ => sess.dcx().span_bug(def.span, "wrong-structured lhs"),
_ => sess.dcx().span_bug(span, "wrong-structured lhs"),
};
let rhses = match &argument_map[&MacroRulesNormalizedIdent::new(rhs_nm)] {
@ -515,17 +509,17 @@ pub fn compile_declarative_macro(
&TokenStream::new(vec![tt.clone()]),
false,
sess,
def.id,
node_id,
features,
edition,
)
.pop()
.unwrap();
}
sess.dcx().span_bug(def.span, "wrong-structured rhs")
sess.dcx().span_bug(span, "wrong-structured rhs")
})
.collect::<Vec<mbe::TokenTree>>(),
_ => sess.dcx().span_bug(def.span, "wrong-structured rhs"),
_ => sess.dcx().span_bug(span, "wrong-structured rhs"),
};
for rhs in &rhses {
@ -537,15 +531,9 @@ pub fn compile_declarative_macro(
check_emission(check_lhs_no_empty_seq(sess, slice::from_ref(lhs)));
}
check_emission(macro_check::check_meta_variables(
&sess.psess,
def.id,
def.span,
&lhses,
&rhses,
));
check_emission(macro_check::check_meta_variables(&sess.psess, node_id, span, &lhses, &rhses));
let (transparency, transparency_error) = attr::find_transparency(&def.attrs, macro_rules);
let (transparency, transparency_error) = attr::find_transparency(attrs, macro_rules);
match transparency_error {
Some(TransparencyError::UnknownTransparency(value, span)) => {
dcx.span_err(span, format!("unknown macro transparency: `{value}`"));
@ -564,7 +552,7 @@ pub fn compile_declarative_macro(
// Compute the spans of the macro rules for unused rule linting.
// Also, we are only interested in non-foreign macros.
let rule_spans = if def.id != DUMMY_NODE_ID {
let rule_spans = if node_id != DUMMY_NODE_ID {
lhses
.iter()
.zip(rhses.iter())
@ -590,15 +578,15 @@ pub fn compile_declarative_macro(
mbe::TokenTree::Delimited(.., delimited) => {
mbe::macro_parser::compute_locs(&delimited.tts)
}
_ => sess.dcx().span_bug(def.span, "malformed macro lhs"),
_ => sess.dcx().span_bug(span, "malformed macro lhs"),
}
})
.collect();
let expander = Box::new(MacroRulesMacroExpander {
name: def.ident,
span: def.span,
node_id: def.id,
name: ident,
span,
node_id,
transparency,
lhses,
rhses,
@ -608,13 +596,13 @@ pub fn compile_declarative_macro(
fn check_lhs_nt_follows(
sess: &Session,
def: &ast::Item,
node_id: NodeId,
lhs: &mbe::TokenTree,
) -> Result<(), ErrorGuaranteed> {
// lhs is going to be like TokenTree::Delimited(...), where the
// entire lhs is those tts. Or, it can be a "bare sequence", not wrapped in parens.
if let mbe::TokenTree::Delimited(.., delimited) = lhs {
check_matcher(sess, def, &delimited.tts)
check_matcher(sess, node_id, &delimited.tts)
} else {
let msg = "invalid macro matcher; matchers must be contained in balanced delimiters";
Err(sess.dcx().span_err(lhs.span(), msg))
@ -686,12 +674,12 @@ fn check_rhs(sess: &Session, rhs: &mbe::TokenTree) -> Result<(), ErrorGuaranteed
fn check_matcher(
sess: &Session,
def: &ast::Item,
node_id: NodeId,
matcher: &[mbe::TokenTree],
) -> Result<(), ErrorGuaranteed> {
let first_sets = FirstSets::new(matcher);
let empty_suffix = TokenSet::empty();
check_matcher_core(sess, def, &first_sets, matcher, &empty_suffix)?;
check_matcher_core(sess, node_id, &first_sets, matcher, &empty_suffix)?;
Ok(())
}
@ -1028,7 +1016,7 @@ impl<'tt> TokenSet<'tt> {
// see `FirstSets::new`.
fn check_matcher_core<'tt>(
sess: &Session,
def: &ast::Item,
node_id: NodeId,
first_sets: &FirstSets<'tt>,
matcher: &'tt [mbe::TokenTree],
follow: &TokenSet<'tt>,
@ -1082,7 +1070,7 @@ fn check_matcher_core<'tt>(
token::CloseDelim(d.delim),
span.close,
));
check_matcher_core(sess, def, first_sets, &d.tts, &my_suffix)?;
check_matcher_core(sess, node_id, first_sets, &d.tts, &my_suffix)?;
// don't track non NT tokens
last.replace_with_irrelevant();
@ -1114,7 +1102,7 @@ fn check_matcher_core<'tt>(
// At this point, `suffix_first` is built, and
// `my_suffix` is some TokenSet that we can use
// for checking the interior of `seq_rep`.
let next = check_matcher_core(sess, def, first_sets, &seq_rep.tts, my_suffix)?;
let next = check_matcher_core(sess, node_id, first_sets, &seq_rep.tts, my_suffix)?;
if next.maybe_empty {
last.add_all(&next);
} else {
@ -1144,7 +1132,7 @@ fn check_matcher_core<'tt>(
// macro. (See #86567.)
// Macros defined in the current crate have a real node id,
// whereas macros from an external crate have a dummy id.
if def.id != DUMMY_NODE_ID
if node_id != DUMMY_NODE_ID
&& matches!(kind, NonterminalKind::Pat(PatParam { inferred: true }))
&& matches!(
next_token,

4
compiler/rustc_metadata/src/creader.rs
View File

@ -28,7 +28,7 @@ use rustc_session::lint::{self, BuiltinLintDiag};
use rustc_session::output::validate_crate_name;
use rustc_session::search_paths::PathKind;
use rustc_span::edition::Edition;
use rustc_span::symbol::{Symbol, sym};
use rustc_span::symbol::{Ident, Symbol, sym};
use rustc_span::{DUMMY_SP, Span};
use rustc_target::spec::{PanicStrategy, Target, TargetTriple};
use tracing::{debug, info, trace};
@ -97,7 +97,7 @@ impl<'a, 'tcx> CrateLoader<'a, 'tcx> {
}
pub enum LoadedMacro {
MacroDef(ast::Item, Edition),
MacroDef { def: MacroDef, ident: Ident, attrs: AttrVec, span: Span, edition: Edition },
ProcMacro(SyntaxExtension),
}

28
compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs
View File

@ -1,7 +1,6 @@
use std::any::Any;
use std::mem;
use rustc_ast as ast;
use rustc_attr::Deprecation;
use rustc_data_structures::sync::Lrc;
use rustc_hir::def::{CtorKind, DefKind, Res};
@ -592,27 +591,16 @@ impl CStore {
let data = self.get_crate_data(id.krate);
if data.root.is_proc_macro_crate() {
return LoadedMacro::ProcMacro(data.load_proc_macro(id.index, tcx));
}
let span = data.get_span(id.index, sess);
LoadedMacro::MacroDef(
ast::Item {
LoadedMacro::ProcMacro(data.load_proc_macro(id.index, tcx))
} else {
LoadedMacro::MacroDef {
def: data.get_macro(id.index, sess),
ident: data.item_ident(id.index, sess),
id: ast::DUMMY_NODE_ID,
span,
attrs: data.get_item_attrs(id.index, sess).collect(),
kind: ast::ItemKind::MacroDef(data.get_macro(id.index, sess)),
vis: ast::Visibility {
span: span.shrink_to_lo(),
kind: ast::VisibilityKind::Inherited,
tokens: None,
},
tokens: None,
},
data.root.edition,
)
span: data.get_span(id.index, sess),
edition: data.root.edition,
}
}
}
pub fn def_span_untracked(&self, def_id: DefId, sess: &Session) -> Span {

4
compiler/rustc_resolve/src/build_reduced_graph.rs
View File

@ -177,7 +177,9 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
let loaded_macro = self.cstore().load_macro_untracked(def_id, self.tcx);
let macro_data = match loaded_macro {
LoadedMacro::MacroDef(item, edition) => self.compile_macro(&item, edition),
LoadedMacro::MacroDef { def, ident, attrs, span, edition } => {
self.compile_macro(&def, ident, &attrs, span, ast::DUMMY_NODE_ID, edition)
}
LoadedMacro::ProcMacro(ext) => MacroData::new(Lrc::new(ext)),
};

6
compiler/rustc_resolve/src/def_collector.rs
View File

@ -199,8 +199,10 @@ impl<'a, 'ra, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'ra, 'tcx> {
},
ItemKind::Const(..) => DefKind::Const,
ItemKind::Fn(..) | ItemKind::Delegation(..) => DefKind::Fn,
ItemKind::MacroDef(..) => {
let macro_data = self.resolver.compile_macro(i, self.resolver.tcx.sess.edition());
ItemKind::MacroDef(def) => {
let edition = self.resolver.tcx.sess.edition();
let macro_data =
self.resolver.compile_macro(def, i.ident, &i.attrs, i.span, i.id, edition);
let macro_kind = macro_data.ext.macro_kind();
opt_macro_data = Some(macro_data);
DefKind::Macro(macro_kind)

40
compiler/rustc_resolve/src/macros.rs
View File

@ -1122,9 +1122,25 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
/// Compile the macro into a `SyntaxExtension` and its rule spans.
///
/// Possibly replace its expander to a pre-defined one for built-in macros.
pub(crate) fn compile_macro(&mut self, item: &ast::Item, edition: Edition) -> MacroData {
let (mut ext, mut rule_spans) =
compile_declarative_macro(self.tcx.sess, self.tcx.features(), item, edition);
pub(crate) fn compile_macro(
&mut self,
macro_def: &ast::MacroDef,
ident: Ident,
attrs: &[ast::Attribute],
span: Span,
node_id: NodeId,
edition: Edition,
) -> MacroData {
let (mut ext, mut rule_spans) = compile_declarative_macro(
self.tcx.sess,
self.tcx.features(),
macro_def,
ident,
attrs,
span,
node_id,
edition,
);
if let Some(builtin_name) = ext.builtin_name {
// The macro was marked with `#[rustc_builtin_macro]`.
@ -1132,28 +1148,22 @@ impl<'ra, 'tcx> Resolver<'ra, 'tcx> {
// The macro is a built-in, replace its expander function
// while still taking everything else from the source code.
// If we already loaded this builtin macro, give a better error message than 'no such builtin macro'.
match mem::replace(builtin_macro, BuiltinMacroState::AlreadySeen(item.span)) {
match mem::replace(builtin_macro, BuiltinMacroState::AlreadySeen(span)) {
BuiltinMacroState::NotYetSeen(builtin_ext) => {
ext.kind = builtin_ext;
rule_spans = Vec::new();
}
BuiltinMacroState::AlreadySeen(span) => {
self.dcx().emit_err(errors::AttemptToDefineBuiltinMacroTwice {
span: item.span,
note_span: span,
});
BuiltinMacroState::AlreadySeen(note_span) => {
self.dcx()
.emit_err(errors::AttemptToDefineBuiltinMacroTwice { span, note_span });
}
}
} else {
self.dcx().emit_err(errors::CannotFindBuiltinMacroWithName {
span: item.span,
ident: item.ident,
});
self.dcx().emit_err(errors::CannotFindBuiltinMacroWithName { span, ident });
}
}
let ItemKind::MacroDef(def) = &item.kind else { unreachable!() };
MacroData { ext: Lrc::new(ext), rule_spans, macro_rules: def.macro_rules }
MacroData { ext: Lrc::new(ext), rule_spans, macro_rules: macro_def.macro_rules }
}
fn path_accessible(

26
src/librustdoc/clean/inline.rs
View File

@ -248,9 +248,7 @@ pub(crate) fn record_extern_fqn(cx: &mut DocContext<'_>, did: DefId, kind: ItemT
// Check to see if it is a macro 2.0 or built-in macro
if matches!(
CStore::from_tcx(cx.tcx).load_macro_untracked(did, cx.tcx),
LoadedMacro::MacroDef(def, _)
if matches!(&def.kind, ast::ItemKind::MacroDef(ast_def)
if !ast_def.macro_rules)
LoadedMacro::MacroDef { def, .. } if !def.macro_rules
) {
once(crate_name).chain(relative).collect()
} else {
@ -747,24 +745,12 @@ fn build_macro(
is_doc_hidden: bool,
) -> clean::ItemKind {
match CStore::from_tcx(cx.tcx).load_macro_untracked(def_id, cx.tcx) {
LoadedMacro::MacroDef(item_def, _) => match macro_kind {
LoadedMacro::MacroDef { def, .. } => match macro_kind {
MacroKind::Bang => {
if let ast::ItemKind::MacroDef(ref def) = item_def.kind {
let vis =
cx.tcx.visibility(import_def_id.map(|d| d.to_def_id()).unwrap_or(def_id));
clean::MacroItem(clean::Macro {
source: utils::display_macro_source(
cx,
name,
def,
def_id,
vis,
is_doc_hidden,
),
})
} else {
unreachable!()
}
let vis = cx.tcx.visibility(import_def_id.map(|d| d.to_def_id()).unwrap_or(def_id));
clean::MacroItem(clean::Macro {
source: utils::display_macro_source(cx, name, &def, def_id, vis, is_doc_hidden),
})
}
MacroKind::Derive | MacroKind::Attr => {
clean::ProcMacroItem(clean::ProcMacro { kind: macro_kind, helpers: Vec::new() })

8
src/librustdoc/html/format.rs
View File

@ -16,6 +16,7 @@ use itertools::Itertools;
use rustc_attr::{ConstStability, StabilityLevel, StableSince};
use rustc_data_structures::captures::Captures;
use rustc_data_structures::fx::FxHashSet;
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
use rustc_metadata::creader::{CStore, LoadedMacro};
@ -25,7 +26,6 @@ use rustc_span::symbol::kw;
use rustc_span::{Symbol, sym};
use rustc_target::spec::abi::Abi;
use tracing::{debug, trace};
use {rustc_ast as ast, rustc_hir as hir};
use super::url_parts_builder::{UrlPartsBuilder, estimate_item_path_byte_length};
use crate::clean::types::ExternalLocation;
@ -554,10 +554,8 @@ fn generate_macro_def_id_path(
// Check to see if it is a macro 2.0 or built-in macro.
// More information in <https://rust-lang.github.io/rfcs/1584-macros.html>.
let is_macro_2 = match cstore.load_macro_untracked(def_id, tcx) {
LoadedMacro::MacroDef(def, _) => {
// If `ast_def.macro_rules` is `true`, then it's not a macro 2.0.
matches!(&def.kind, ast::ItemKind::MacroDef(ast_def) if !ast_def.macro_rules)
}
// If `def.macro_rules` is `true`, then it's not a macro 2.0.
LoadedMacro::MacroDef { def, .. } => !def.macro_rules,
_ => false,
};