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Auto merge of #15367 - Veykril:eager-macro-inputs, r=Veykril

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fix: Strip unused token ids from eager macro input token maps
This commit is contained in:
bors 2023-08-01 11:23:02 +00:00
commit 151c750dac
10 changed files with 123 additions and 47 deletions
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23
crates/hir-def/src/lib.rs
View file

@ -1083,7 +1083,7 @@ pub trait AsMacroCall {
&self,
db: &dyn ExpandDatabase,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId> + Copy,
) -> Option<MacroCallId> {
self.as_call_id_with_errors(db, krate, resolver).ok()?.value
}
@ -1092,7 +1092,7 @@ pub trait AsMacroCall {
&self,
db: &dyn ExpandDatabase,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId> + Copy,
) -> Result<ExpandResult<Option<MacroCallId>>, UnresolvedMacro>;
}
@ -1101,7 +1101,7 @@ impl AsMacroCall for InFile<&ast::MacroCall> {
&self,
db: &dyn ExpandDatabase,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId> + Copy,
) -> Result<ExpandResult<Option<MacroCallId>>, UnresolvedMacro> {
let expands_to = hir_expand::ExpandTo::from_call_site(self.value);
let ast_id = AstId::new(self.file_id, db.ast_id_map(self.file_id).ast_id(self.value));
@ -1112,12 +1112,13 @@ impl AsMacroCall for InFile<&ast::MacroCall> {
return Ok(ExpandResult::only_err(ExpandError::other("malformed macro invocation")));
};
macro_call_as_call_id_(
macro_call_as_call_id_with_eager(
db,
&AstIdWithPath::new(ast_id.file_id, ast_id.value, path),
expands_to,
krate,
resolver,
resolver,
)
}
}
@ -1140,17 +1141,19 @@ fn macro_call_as_call_id(
call: &AstIdWithPath<ast::MacroCall>,
expand_to: ExpandTo,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId> + Copy,
) -> Result<Option<MacroCallId>, UnresolvedMacro> {
macro_call_as_call_id_(db, call, expand_to, krate, resolver).map(|res| res.value)
macro_call_as_call_id_with_eager(db, call, expand_to, krate, resolver, resolver)
.map(|res| res.value)
}
fn macro_call_as_call_id_(
fn macro_call_as_call_id_with_eager(
db: &dyn ExpandDatabase,
call: &AstIdWithPath<ast::MacroCall>,
expand_to: ExpandTo,
krate: CrateId,
resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
resolver: impl FnOnce(path::ModPath) -> Option<MacroDefId>,
eager_resolver: impl Fn(path::ModPath) -> Option<MacroDefId>,
) -> Result<ExpandResult<Option<MacroCallId>>, UnresolvedMacro> {
let def =
resolver(call.path.clone()).ok_or_else(|| UnresolvedMacro { path: call.path.clone() })?;
@ -1159,8 +1162,8 @@ fn macro_call_as_call_id_(
MacroDefKind::BuiltInEager(..) => {
let macro_call = InFile::new(call.ast_id.file_id, call.ast_id.to_node(db));
expand_eager_macro_input(db, krate, macro_call, def, &|path| {
resolver(path).filter(MacroDefId::is_fn_like)
})?
eager_resolver(path).filter(MacroDefId::is_fn_like)
})
}
_ if def.is_fn_like() => ExpandResult {
value: Some(def.as_lazy_macro(

24
crates/hir-def/src/macro_expansion_tests/mbe.rs
View file

@ -99,6 +99,30 @@ fn#19 main#20(#21)#21 {#22
);
}
#[test]
fn eager_expands_with_unresolved_within() {
check(
r#"
#[rustc_builtin_macro]
#[macro_export]
macro_rules! format_args {}
fn main(foo: ()) {
format_args!("{} {} {}", format_args!("{}", 0), foo, identity!(10), "bar")
}
"#,
expect![[r##"
#[rustc_builtin_macro]
#[macro_export]
macro_rules! format_args {}
fn main(foo: ()) {
/* error: unresolved macro identity */::core::fmt::Arguments::new_v1(&["", " ", " ", ], &[::core::fmt::ArgumentV1::new(&(::core::fmt::Arguments::new_v1(&["", ], &[::core::fmt::ArgumentV1::new(&(0), ::core::fmt::Display::fmt), ])), ::core::fmt::Display::fmt), ::core::fmt::ArgumentV1::new(&(foo), ::core::fmt::Display::fmt), ::core::fmt::ArgumentV1::new(&(identity!(10)), ::core::fmt::Display::fmt), ])
}
"##]],
);
}
#[test]
fn token_mapping_eager() {
check(

39
crates/hir-def/src/nameres/collector.rs
View file

@ -38,7 +38,7 @@ use crate::{
self, ExternCrate, Fields, FileItemTreeId, ImportKind, ItemTree, ItemTreeId, ItemTreeNode,
MacroCall, MacroDef, MacroRules, Mod, ModItem, ModKind, TreeId,
},
macro_call_as_call_id, macro_id_to_def_id,
macro_call_as_call_id, macro_call_as_call_id_with_eager, macro_id_to_def_id,
nameres::{
diagnostics::DefDiagnostic,
mod_resolution::ModDir,
@ -2187,7 +2187,7 @@ impl ModCollector<'_, '_> {
// scopes without eager expansion.
// Case 1: try to resolve macro calls with single-segment name and expand macro_rules
if let Ok(res) = macro_call_as_call_id(
if let Ok(res) = macro_call_as_call_id_with_eager(
db.upcast(),
&ast_id,
mac.expand_to,
@ -2210,19 +2210,34 @@ impl ModCollector<'_, '_> {
.map(|it| macro_id_to_def_id(self.def_collector.db, it))
})
},
) {
// Legacy macros need to be expanded immediately, so that any macros they produce
// are in scope.
if let Some(val) = res {
self.def_collector.collect_macro_expansion(
|path| {
let resolved_res = self.def_collector.def_map.resolve_path_fp_with_macro(
db,
ResolveMode::Other,
self.module_id,
val,
self.macro_depth + 1,
container,
&path,
BuiltinShadowMode::Module,
Some(MacroSubNs::Bang),
);
}
resolved_res.resolved_def.take_macros().map(|it| macro_id_to_def_id(db, it))
},
) {
// FIXME: if there were errors, this mightve been in the eager expansion from an
// unresolved macro, so we need to push this into late macro resolution. see fixme above
if res.err.is_none() {
// Legacy macros need to be expanded immediately, so that any macros they produce
// are in scope.
if let Some(val) = res.value {
self.def_collector.collect_macro_expansion(
self.module_id,
val,
self.macro_depth + 1,
container,
);
}
return;
return;
}
}
// Case 2: resolve in module scope, expand during name resolution.

45
crates/hir-expand/src/eager.rs
View file

@ -19,7 +19,7 @@
//!
//! See the full discussion : <https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Eager.20expansion.20of.20built-in.20macros>
use base_db::CrateId;
use rustc_hash::FxHashMap;
use rustc_hash::{FxHashMap, FxHashSet};
use syntax::{ted, Parse, SyntaxNode, TextRange, TextSize, WalkEvent};
use triomphe::Arc;
@ -29,7 +29,7 @@ use crate::{
hygiene::Hygiene,
mod_path::ModPath,
EagerCallInfo, ExpandError, ExpandResult, ExpandTo, InFile, MacroCallId, MacroCallKind,
MacroCallLoc, MacroDefId, MacroDefKind, UnresolvedMacro,
MacroCallLoc, MacroDefId, MacroDefKind,
};
pub fn expand_eager_macro_input(
@ -38,7 +38,7 @@ pub fn expand_eager_macro_input(
macro_call: InFile<ast::MacroCall>,
def: MacroDefId,
resolver: &dyn Fn(ModPath) -> Option<MacroDefId>,
) -> Result<ExpandResult<Option<MacroCallId>>, UnresolvedMacro> {
) -> ExpandResult<Option<MacroCallId>> {
let ast_map = db.ast_id_map(macro_call.file_id);
// the expansion which the ast id map is built upon has no whitespace, so the offsets are wrong as macro_call is from the token tree that has whitespace!
let call_id = InFile::new(macro_call.file_id, ast_map.ast_id(&macro_call.value));
@ -71,22 +71,23 @@ pub fn expand_eager_macro_input(
InFile::new(arg_id.as_file(), arg_exp.syntax_node()),
krate,
resolver,
)?
)
};
let err = parse_err.or(err);
let Some((expanded_eager_input, mapping)) = expanded_eager_input else {
return Ok(ExpandResult { value: None, err });
return ExpandResult { value: None, err };
};
let (mut subtree, expanded_eager_input_token_map) =
mbe::syntax_node_to_token_tree(&expanded_eager_input);
let og_tmap = if let Some(tt) = macro_call.value.token_tree() {
let og_tmap = mbe::syntax_node_to_token_map(tt.syntax());
let mut ids_used = FxHashSet::default();
let mut og_tmap = mbe::syntax_node_to_token_map(tt.syntax());
// The tokenmap and ids of subtree point into the expanded syntax node, but that is inaccessible from the outside
// so we need to remap them to the original input of the eager macro.
subtree.visit_ids(&|id| {
subtree.visit_ids(&mut |id| {
// Note: we discard all token ids of braces and the like here, but that's not too bad and only a temporary fix
if let Some(range) = expanded_eager_input_token_map
@ -97,6 +98,7 @@ pub fn expand_eager_macro_input(
// remap from eager input expansion to original eager input
if let Some(&og_range) = ws_mapping.get(og_range) {
if let Some(og_token) = og_tmap.token_by_range(og_range) {
ids_used.insert(og_token);
return og_token;
}
}
@ -104,6 +106,7 @@ pub fn expand_eager_macro_input(
}
tt::TokenId::UNSPECIFIED
});
og_tmap.filter(|id| ids_used.contains(&id));
og_tmap
} else {
Default::default()
@ -121,7 +124,7 @@ pub fn expand_eager_macro_input(
kind: MacroCallKind::FnLike { ast_id: call_id, expand_to },
};
Ok(ExpandResult { value: Some(db.intern_macro_call(loc)), err })
ExpandResult { value: Some(db.intern_macro_call(loc)), err }
}
fn lazy_expand(
@ -147,13 +150,13 @@ fn eager_macro_recur(
curr: InFile<SyntaxNode>,
krate: CrateId,
macro_resolver: &dyn Fn(ModPath) -> Option<MacroDefId>,
) -> Result<ExpandResult<Option<(SyntaxNode, FxHashMap<TextRange, TextRange>)>>, UnresolvedMacro> {
) -> ExpandResult<Option<(SyntaxNode, FxHashMap<TextRange, TextRange>)>> {
let original = curr.value.clone_for_update();
let mut mapping = FxHashMap::default();
let mut replacements = Vec::new();
// Note: We only report a single error inside of eager expansions
// FIXME: We only report a single error inside of eager expansions
let mut error = None;
let mut offset = 0i32;
let apply_offset = |it: TextSize, offset: i32| {
@ -184,7 +187,14 @@ fn eager_macro_recur(
}
};
let def = match call.path().and_then(|path| ModPath::from_src(db, path, hygiene)) {
Some(path) => macro_resolver(path.clone()).ok_or(UnresolvedMacro { path })?,
Some(path) => match macro_resolver(path.clone()) {
Some(def) => def,
None => {
error =
Some(ExpandError::other(format!("unresolved macro {}", path.display(db))));
continue;
}
},
None => {
error = Some(ExpandError::other("malformed macro invocation"));
continue;
@ -192,16 +202,13 @@ fn eager_macro_recur(
};
let ExpandResult { value, err } = match def.kind {
MacroDefKind::BuiltInEager(..) => {
let ExpandResult { value, err } = match expand_eager_macro_input(
let ExpandResult { value, err } = expand_eager_macro_input(
db,
krate,
curr.with_value(call.clone()),
def,
macro_resolver,
) {
Ok(it) => it,
Err(err) => return Err(err),
};
);
match value {
Some(call_id) => {
let ExpandResult { value, err: err2 } =
@ -251,7 +258,7 @@ fn eager_macro_recur(
parse.as_ref().map(|it| it.syntax_node()),
krate,
macro_resolver,
)?;
);
let err = err.or(error);
if let Some(tt) = call.token_tree() {
@ -281,7 +288,7 @@ fn eager_macro_recur(
}
// check if the whole original syntax is replaced
if call.syntax() == &original {
return Ok(ExpandResult { value: value.zip(Some(mapping)), err: error });
return ExpandResult { value: value.zip(Some(mapping)), err: error };
}
if let Some(insert) = value {
@ -292,5 +299,5 @@ fn eager_macro_recur(
}
replacements.into_iter().rev().for_each(|(old, new)| ted::replace(old.syntax(), new));
Ok(ExpandResult { value: Some((original, mapping)), err: error })
ExpandResult { value: Some((original, mapping)), err: error }
}

2
crates/ide-diagnostics/src/handlers/macro_error.rs
View file

@ -80,7 +80,7 @@ macro_rules! m {
fn f() {
m!();
//^^^^ error: unresolved macro `$crate::private::concat!`
//^^^^ error: unresolved macro $crate::private::concat
}
//- /core.rs crate:core

14
crates/ide/src/syntax_highlighting/test_data/highlight_macros.html
View file

@ -90,8 +90,18 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="brace">}</span>
<span class="brace">}</span>
<span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute library">rustc_builtin_macro</span><span class="attribute_bracket attribute">]</span>
<span class="keyword">macro_rules</span><span class="macro_bang">!</span> <span class="macro declaration">concat</span> <span class="brace">{</span><span class="brace">}</span>
<span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute library">rustc_builtin_macro</span><span class="attribute_bracket attribute">]</span>
<span class="keyword">macro_rules</span><span class="macro_bang">!</span> <span class="macro declaration">include</span> <span class="brace">{</span><span class="brace">}</span>
<span class="attribute_bracket attribute">#</span><span class="attribute_bracket attribute">[</span><span class="builtin_attr attribute library">rustc_builtin_macro</span><span class="attribute_bracket attribute">]</span>
<span class="keyword">macro_rules</span><span class="macro_bang">!</span> <span class="macro declaration">format_args</span> <span class="brace">{</span><span class="brace">}</span>
<span class="macro">include</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="none macro">concat</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"foo/"</span><span class="comma macro">,</span> <span class="string_literal macro">"foo.rs"</span><span class="parenthesis macro">)</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="keyword">fn</span> <span class="function declaration">main</span><span class="parenthesis">(</span><span class="parenthesis">)</span> <span class="brace">{</span>
<span class="unresolved_reference">println</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"Hello, {}!"</span><span class="comma macro">,</span> <span class="numeric_literal macro">92</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"Hello, </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">!"</span><span class="comma macro">,</span> <span class="numeric_literal macro">92</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">dont_color_me_braces</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">noop</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="macro macro">noop</span><span class="macro_bang macro">!</span><span class="parenthesis macro">(</span><span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="brace">}</span></code></pre>
<span class="brace">}</span>
</code></pre>

2
crates/ide/src/syntax_highlighting/test_data/highlight_strings.html
View file

@ -178,5 +178,5 @@ pre { color: #DCDCCC; background: #3F3F3F; font-size: 22px; padd
<span class="macro">toho</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">fmt"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro unsafe">asm</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"mov eax, </span><span class="format_specifier">{</span><span class="numeric_literal">0</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="none macro">concat</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="string_literal macro">"{}"</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="none macro">backslash</span><span class="comma macro">,</span> <span class="none macro">format_args</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="none macro">foo</span><span class="comma macro">,</span> <span class="string_literal macro">"bar"</span><span class="comma macro">,</span> <span class="none macro">toho</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="none macro">backslash</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="variable macro reference">backslash</span><span class="comma macro">,</span> <span class="none macro">format_args</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="unresolved_reference macro">foo</span><span class="comma macro">,</span> <span class="string_literal macro">"bar"</span><span class="comma macro">,</span> <span class="none macro">toho</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="variable macro reference">backslash</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
<span class="brace">}</span></code></pre>

15
crates/ide/src/syntax_highlighting/tests.rs
View file

@ -48,6 +48,7 @@ fn macros() {
check_highlighting(
r#"
//- proc_macros: mirror
//- /lib.rs crate:lib
proc_macros::mirror! {
{
,i32 :x pub
@ -95,11 +96,23 @@ macro without_args {
}
}
#[rustc_builtin_macro]
macro_rules! concat {}
#[rustc_builtin_macro]
macro_rules! include {}
#[rustc_builtin_macro]
macro_rules! format_args {}
include!(concat!("foo/", "foo.rs"));
fn main() {
println!("Hello, {}!", 92);
format_args!("Hello, {}!", 92);
dont_color_me_braces!();
noop!(noop!(1));
}
//- /foo/foo.rs crate:foo
mod foo {}
use self::foo as bar;
"#,
expect_file!["./test_data/highlight_macros.html"],
false,

4
crates/mbe/src/token_map.rs
View file

@ -117,4 +117,8 @@ impl TokenMap {
TokenTextRange::Delimiter(_) => None,
})
}
pub fn filter(&mut self, id: impl Fn(tt::TokenId) -> bool) {
self.entries.retain(|&(tid, _)| id(tid));
}
}

2
crates/tt/src/lib.rs
View file

@ -70,7 +70,7 @@ pub mod token_id {
}
impl Subtree {
pub fn visit_ids(&mut self, f: &impl Fn(TokenId) -> TokenId) {
pub fn visit_ids(&mut self, f: &mut impl FnMut(TokenId) -> TokenId) {
self.delimiter.open = f(self.delimiter.open);
self.delimiter.close = f(self.delimiter.close);
self.token_trees.iter_mut().for_each(|tt| match tt {