pub mod proc_macro;
pub mod quote;
pub mod eager;
+pub mod mod_path;
+mod fixup;
-use base_db::ProcMacroKind;
-use either::Either;
-
-pub use mbe::{ExpandError, ExpandResult};
+pub use mbe::{Origin, ValueResult};
-use std::{hash::Hash, iter, sync::Arc};
+use std::{fmt, hash::Hash, iter, sync::Arc};
-use base_db::{impl_intern_key, salsa, CrateId, FileId, FileRange};
+use base_db::{impl_intern_key, salsa, CrateId, FileId, FileRange, ProcMacroKind};
+use either::Either;
use syntax::{
algo::{self, skip_trivia_token},
- ast::{self, AstNode, HasAttrs},
+ ast::{self, AstNode, HasDocComments},
Direction, SyntaxNode, SyntaxToken,
};
builtin_derive_macro::BuiltinDeriveExpander,
builtin_fn_macro::{BuiltinFnLikeExpander, EagerExpander},
db::TokenExpander,
+ mod_path::ModPath,
proc_macro::ProcMacroExpander,
};
+pub type ExpandResult<T> = ValueResult<T, ExpandError>;
+
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub enum ExpandError {
+ UnresolvedProcMacro,
+ Mbe(mbe::ExpandError),
+ Other(Box<str>),
+}
+
+impl From<mbe::ExpandError> for ExpandError {
+ fn from(mbe: mbe::ExpandError) -> Self {
+ Self::Mbe(mbe)
+ }
+}
+
+impl fmt::Display for ExpandError {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ match self {
+ ExpandError::UnresolvedProcMacro => f.write_str("unresolved proc-macro"),
+ ExpandError::Mbe(it) => it.fmt(f),
+ ExpandError::Other(it) => f.write_str(it),
+ }
+ }
+}
+
/// Input to the analyzer is a set of files, where each file is identified by
/// `FileId` and contains source code. However, another source of source code in
/// Rust are macros: each macro can be thought of as producing a "temporary
FileId(FileId),
MacroFile(MacroFile),
}
+
impl From<FileId> for HirFileId {
fn from(id: FileId) -> Self {
HirFileId(HirFileIdRepr::FileId(id))
}
}
+
impl From<MacroFile> for HirFileId {
fn from(id: MacroFile) -> Self {
HirFileId(HirFileIdRepr::MacroFile(id))
expand_to: ExpandTo,
},
Derive {
- ast_id: AstId<ast::Item>,
- derive_name: Box<str>,
+ ast_id: AstId<ast::Adt>,
/// Syntactical index of the invoking `#[derive]` attribute.
///
/// 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,
+ /// Index of the derive macro in the derive attribute
+ derive_index: u32,
},
Attr {
ast_id: AstId<ast::Item>,
- attr_name: Box<str>,
- attr_args: (tt::Subtree, mbe::TokenMap),
+ attr_args: Arc<(tt::Subtree, mbe::TokenMap)>,
/// Syntactical index of the invoking `#[attribute]`.
///
/// 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,
+ /// Whether this attribute is the `#[derive]` attribute.
+ is_derive: bool,
},
}
match self.0 {
HirFileIdRepr::FileId(file_id) => file_id,
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
- let file_id = match &loc.eager {
- Some(EagerCallInfo { included_file: Some(file), .. }) => (*file).into(),
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
+ let file_id = match loc.eager {
+ Some(EagerCallInfo { included_file: Some(file), .. }) => file.into(),
_ => loc.kind.file_id(),
};
file_id.original_file(db)
let mut level = 0;
let mut curr = self;
while let HirFileIdRepr::MacroFile(macro_file) = curr.0 {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
level += 1;
curr = loc.kind.file_id();
match self.0 {
HirFileIdRepr::FileId(_) => None,
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
Some(loc.kind.to_node(db))
}
}
match self.0 {
HirFileIdRepr::FileId(_) => None,
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
let arg_tt = loc.kind.arg(db)?;
+ let macro_def = db.macro_def(loc.def).ok()?;
+ let (parse, exp_map) = db.parse_macro_expansion(macro_file).value?;
+ let macro_arg = db.macro_arg(macro_file.macro_call_id)?;
+
let def = loc.def.ast_id().left().and_then(|id| {
let def_tt = match id.to_node(db) {
ast::Macro::MacroRules(mac) => mac.token_tree()?,
+ ast::Macro::MacroDef(_)
+ if matches!(*macro_def, TokenExpander::BuiltinAttr(_)) =>
+ {
+ return None
+ }
ast::Macro::MacroDef(mac) => mac.body()?,
};
Some(InFile::new(id.file_id, def_tt))
MacroCallKind::Attr { ast_id, invoc_attr_index, .. } => {
let tt = ast_id
.to_node(db)
- .attrs()
- .nth(invoc_attr_index as usize)?
+ .doc_comments_and_attrs()
+ .nth(invoc_attr_index as usize)
+ .and_then(Either::left)?
.token_tree()?;
Some(InFile::new(ast_id.file_id, tt))
}
_ => None,
});
- let macro_def = db.macro_def(loc.def).ok()?;
- let (parse, exp_map) = db.parse_macro_expansion(macro_file).value?;
- let macro_arg = db.macro_arg(macro_file.macro_call_id)?;
-
Some(ExpansionInfo {
expanded: InFile::new(self, parse.syntax_node()),
arg: InFile::new(loc.kind.file_id(), arg_tt),
}
/// Indicate it is macro file generated for builtin derive
- pub fn is_builtin_derive(&self, db: &dyn db::AstDatabase) -> Option<InFile<ast::Item>> {
+ pub fn is_builtin_derive(&self, db: &dyn db::AstDatabase) -> Option<InFile<ast::Attr>> {
match self.0 {
HirFileIdRepr::FileId(_) => None,
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
- let item = match loc.def.kind {
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
+ let attr = match loc.def.kind {
MacroDefKind::BuiltInDerive(..) => loc.kind.to_node(db),
_ => return None,
};
- Some(item.with_value(ast::Item::cast(item.value.clone())?))
+ Some(attr.with_value(ast::Attr::cast(attr.value.clone())?))
}
}
}
match self.0 {
HirFileIdRepr::FileId(_) => false,
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
- match loc.def.kind {
- MacroDefKind::ProcMacro(_, ProcMacroKind::CustomDerive, _) => true,
- _ => false,
- }
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
+ matches!(loc.def.kind, MacroDefKind::ProcMacro(_, ProcMacroKind::CustomDerive, _))
}
}
}
pub fn is_include_macro(&self, db: &dyn db::AstDatabase) -> bool {
match self.0 {
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
matches!(loc.eager, Some(EagerCallInfo { included_file: Some(_), .. }))
}
_ => false,
}
}
- /// Return whether this file is an include macro
+ /// Return whether this file is an attr macro
pub fn is_attr_macro(&self, db: &dyn db::AstDatabase) -> bool {
match self.0 {
HirFileIdRepr::MacroFile(macro_file) => {
- let loc: MacroCallLoc = db.lookup_intern_macro(macro_file.macro_call_id);
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
matches!(loc.kind, MacroCallKind::Attr { .. })
}
_ => false,
}
}
+ /// Return whether this file is the pseudo expansion of the derive attribute.
+ /// See [`crate::builtin_attr_macro::derive_attr_expand`].
+ pub fn is_derive_attr_pseudo_expansion(&self, db: &dyn db::AstDatabase) -> bool {
+ match self.0 {
+ HirFileIdRepr::MacroFile(macro_file) => {
+ let loc: MacroCallLoc = db.lookup_intern_macro_call(macro_file.macro_call_id);
+ matches!(loc.kind, MacroCallKind::Attr { is_derive: true, .. })
+ }
+ _ => false,
+ }
+ }
+
pub fn is_macro(self) -> bool {
matches!(self.0, HirFileIdRepr::MacroFile(_))
}
+
+ pub fn macro_file(self) -> Option<MacroFile> {
+ match self.0 {
+ HirFileIdRepr::FileId(_) => None,
+ HirFileIdRepr::MacroFile(m) => Some(m),
+ }
+ }
}
impl MacroDefId {
krate: CrateId,
kind: MacroCallKind,
) -> MacroCallId {
- db.intern_macro(MacroCallLoc { def: self, krate, eager: None, kind })
+ db.intern_macro_call(MacroCallLoc { def: self, krate, eager: None, kind })
}
pub fn ast_id(&self) -> Either<AstId<ast::Macro>, AstId<ast::Fn>> {
- let id = match &self.kind {
- MacroDefKind::ProcMacro(.., id) => return Either::Right(*id),
+ let id = match self.kind {
+ MacroDefKind::ProcMacro(.., id) => return Either::Right(id),
MacroDefKind::Declarative(id)
| MacroDefKind::BuiltIn(_, id)
| MacroDefKind::BuiltInAttr(_, id)
| MacroDefKind::BuiltInDerive(_, id)
| MacroDefKind::BuiltInEager(_, id) => id,
};
- Either::Left(*id)
+ Either::Left(id)
}
pub fn is_proc_macro(&self) -> bool {
impl MacroCallKind {
/// Returns the file containing the macro invocation.
fn file_id(&self) -> HirFileId {
- match self {
- MacroCallKind::FnLike { ast_id, .. } => ast_id.file_id,
- MacroCallKind::Derive { ast_id, .. } | MacroCallKind::Attr { ast_id, .. } => {
- ast_id.file_id
- }
+ match *self {
+ MacroCallKind::FnLike { ast_id: InFile { file_id, .. }, .. }
+ | MacroCallKind::Derive { ast_id: InFile { file_id, .. }, .. }
+ | MacroCallKind::Attr { ast_id: InFile { file_id, .. }, .. } => file_id,
}
}
MacroCallKind::FnLike { ast_id, .. } => {
ast_id.with_value(ast_id.to_node(db).syntax().clone())
}
- MacroCallKind::Derive { ast_id, .. } | MacroCallKind::Attr { ast_id, .. } => {
+ MacroCallKind::Derive { ast_id, derive_attr_index, .. } => {
+ // 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)
+ .and_then(|it| match it {
+ Either::Left(attr) => Some(attr.syntax().clone()),
+ Either::Right(_) => None,
+ })
+ .unwrap_or_else(|| it.syntax().clone())
+ })
+ }
+ MacroCallKind::Attr { ast_id, is_derive: true, invoc_attr_index, .. } => {
+ // 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)
+ .and_then(|it| match it {
+ Either::Left(attr) => Some(attr.syntax().clone()),
+ Either::Right(_) => None,
+ })
+ .unwrap_or_else(|| it.syntax().clone())
+ })
+ }
+ MacroCallKind::Attr { ast_id, .. } => {
ast_id.with_value(ast_id.to_node(db).syntax().clone())
}
}
}
+ /// Returns the original file range that best describes the location of this macro call.
+ ///
+ /// Here we try to roughly match what rustc does to improve diagnostics: fn-like macros
+ /// get the whole `ast::MacroCall`, attribute macros get the attribute's range, and derives
+ /// get only the specific derive that is being referred to.
+ pub fn original_call_range(self, db: &dyn db::AstDatabase) -> FileRange {
+ let mut kind = self;
+ let file_id = loop {
+ match kind.file_id().0 {
+ HirFileIdRepr::MacroFile(file) => {
+ kind = db.lookup_intern_macro_call(file.macro_call_id).kind;
+ }
+ HirFileIdRepr::FileId(file_id) => break file_id,
+ }
+ };
+
+ let range = match kind {
+ 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
+ ast_id
+ .to_node(db)
+ .doc_comments_and_attrs()
+ .nth(derive_attr_index as usize)
+ .expect("missing derive")
+ .expect_left("derive is a doc comment?")
+ .syntax()
+ .text_range()
+ }
+ MacroCallKind::Attr { ast_id, invoc_attr_index, .. } => ast_id
+ .to_node(db)
+ .doc_comments_and_attrs()
+ .nth(invoc_attr_index as usize)
+ .expect("missing attribute")
+ .expect_left("attribute macro is a doc comment?")
+ .syntax()
+ .text_range(),
+ };
+
+ FileRange { range, file_id }
+ }
+
fn arg(&self, db: &dyn db::AstDatabase) -> Option<SyntaxNode> {
match self {
MacroCallKind::FnLike { ast_id, .. } => {
Some(ast_id.to_node(db).token_tree()?.syntax().clone())
}
- MacroCallKind::Derive { ast_id, .. } | MacroCallKind::Attr { ast_id, .. } => {
- Some(ast_id.to_node(db).syntax().clone())
- }
+ MacroCallKind::Derive { ast_id, .. } => Some(ast_id.to_node(db).syntax().clone()),
+ MacroCallKind::Attr { ast_id, .. } => Some(ast_id.to_node(db).syntax().clone()),
}
}
match self {
MacroCallKind::FnLike { expand_to, .. } => *expand_to,
MacroCallKind::Derive { .. } => ExpandTo::Items,
+ MacroCallKind::Attr { is_derive: true, .. } => ExpandTo::Statements,
MacroCallKind::Attr { .. } => ExpandTo::Items, // is this always correct?
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct ExpansionInfo {
expanded: InFile<SyntaxNode>,
+ /// The argument TokenTree or item for attributes
arg: InFile<SyntaxNode>,
- /// The `macro_rules!` arguments or attribute input.
+ /// The `macro_rules!` or attribute input.
attr_input_or_mac_def: Option<InFile<ast::TokenTree>>,
macro_def: Arc<TokenExpander>,
- macro_arg: Arc<(tt::Subtree, mbe::TokenMap)>,
+ macro_arg: Arc<(tt::Subtree, mbe::TokenMap, fixup::SyntaxFixupUndoInfo)>,
+ /// A shift built from `macro_arg`'s subtree, relevant for attributes as the item is the macro arg
+ /// and as such we need to shift tokens if they are part of an attributes input instead of their item.
macro_arg_shift: mbe::Shift,
exp_map: Arc<mbe::TokenMap>,
}
-pub use mbe::Origin;
-
impl ExpansionInfo {
+ pub fn expanded(&self) -> InFile<SyntaxNode> {
+ self.expanded.clone()
+ }
+
pub fn call_node(&self) -> Option<InFile<SyntaxNode>> {
Some(self.arg.with_value(self.arg.value.parent()?))
}
+ /// Map a token down from macro input into the macro expansion.
+ ///
+ /// The inner workings of this function differ slightly depending on the type of macro we are dealing with:
+ /// - declarative:
+ /// For declarative macros, we need to accommodate for the macro definition site(which acts as a second unchanging input)
+ /// , as tokens can mapped in and out of it.
+ /// To do this we shift all ids in the expansion by the maximum id of the definition site giving us an easy
+ /// way to map all the tokens.
+ /// - attribute:
+ /// Attributes have two different inputs, the input tokentree in the attribute node and the item
+ /// the attribute is annotating. Similarly as for declarative macros we need to do a shift here
+ /// as well. Currently this is done by shifting the attribute input by the maximum id of the item.
+ /// - function-like and derives:
+ /// Both of these only have one simple call site input so no special handling is required here.
pub fn map_token_down(
&self,
db: &dyn db::AstDatabase,
token: InFile<&SyntaxToken>,
) -> Option<impl Iterator<Item = InFile<SyntaxToken>> + '_> {
assert_eq!(token.file_id, self.arg.file_id);
- let token_id = if let Some(item) = item {
+ let token_id_in_attr_input = if let Some(item) = item {
// check if we are mapping down in an attribute input
- let call_id = match self.expanded.file_id.0 {
- HirFileIdRepr::FileId(_) => return None,
- HirFileIdRepr::MacroFile(macro_file) => macro_file.macro_call_id,
- };
- let loc = db.lookup_intern_macro(call_id);
+ // this is a special case as attributes can have two inputs
+ let call_id = self.expanded.file_id.macro_file()?.macro_call_id;
+ let loc = db.lookup_intern_macro_call(call_id);
let token_range = token.value.text_range();
match &loc.kind {
- MacroCallKind::Attr { attr_args, invoc_attr_index, .. } => {
- let attr = item.attrs().nth(*invoc_attr_index as usize)?;
+ MacroCallKind::Attr { attr_args, invoc_attr_index, is_derive, .. } => {
+ let attr = item
+ .doc_comments_and_attrs()
+ .nth(*invoc_attr_index as usize)
+ .and_then(Either::left)?;
match attr.token_tree() {
Some(token_tree)
if token_tree.syntax().text_range().contains_range(token_range) =>
{
let attr_input_start =
token_tree.left_delimiter_token()?.text_range().start();
- let range = token.value.text_range().checked_sub(attr_input_start)?;
- let token_id =
- self.macro_arg_shift.shift(attr_args.1.token_by_range(range)?);
+ let relative_range =
+ token.value.text_range().checked_sub(attr_input_start)?;
+ // shift by the item's tree's max id
+ let token_id = attr_args.1.token_by_range(relative_range)?;
+ let token_id = if *is_derive {
+ // we do not shift for `#[derive]`, as we only need to downmap the derive attribute tokens
+ token_id
+ } else {
+ self.macro_arg_shift.shift(token_id)
+ };
Some(token_id)
}
_ => None,
None
};
- let token_id = match token_id {
+ let token_id = match token_id_in_attr_input {
Some(token_id) => token_id,
+ // the token is not inside an attribute's input so do the lookup in the macro_arg as ususal
None => {
- let range =
+ let relative_range =
token.value.text_range().checked_sub(self.arg.value.text_range().start())?;
- let token_id = self.macro_arg.1.token_by_range(range)?;
+ let token_id = self.macro_arg.1.token_by_range(relative_range)?;
+ // conditionally shift the id by a declaratives macro definition
self.macro_def.map_id_down(token_id)
}
};
Some(tokens.map(move |token| self.expanded.with_value(token)))
}
+ /// Map a token up out of the expansion it resides in into the arguments of the macro call of the expansion.
pub fn map_token_up(
&self,
db: &dyn db::AstDatabase,
token: InFile<&SyntaxToken>,
) -> Option<(InFile<SyntaxToken>, Origin)> {
+ // Fetch the id through its text range,
let token_id = self.exp_map.token_by_range(token.value.text_range())?;
+ // conditionally unshifting the id to accommodate for macro-rules def site
let (mut token_id, origin) = self.macro_def.map_id_up(token_id);
- let call_id = match self.expanded.file_id.0 {
- HirFileIdRepr::FileId(_) => return None,
- HirFileIdRepr::MacroFile(macro_file) => macro_file.macro_call_id,
- };
- let loc = db.lookup_intern_macro(call_id);
+ let call_id = self.expanded.file_id.macro_file()?.macro_call_id;
+ let loc = db.lookup_intern_macro_call(call_id);
+ // Attributes are a bit special for us, they have two inputs, the input tokentree and the annotated item.
let (token_map, tt) = match &loc.kind {
- MacroCallKind::Attr { attr_args, .. } => match self.macro_arg_shift.unshift(token_id) {
- Some(unshifted) => {
- token_id = unshifted;
- (&attr_args.1, self.attr_input_or_mac_def.clone()?.syntax().cloned())
+ MacroCallKind::Attr { attr_args, is_derive: true, .. } => {
+ (&attr_args.1, self.attr_input_or_mac_def.clone()?.syntax().cloned())
+ }
+ MacroCallKind::Attr { attr_args, .. } => {
+ // try unshifting the the token id, if unshifting fails, the token resides in the non-item attribute input
+ // note that the `TokenExpander::map_id_up` earlier only unshifts for declarative macros, so we don't double unshift with this
+ match self.macro_arg_shift.unshift(token_id) {
+ Some(unshifted) => {
+ token_id = unshifted;
+ (&attr_args.1, self.attr_input_or_mac_def.clone()?.syntax().cloned())
+ }
+ None => (&self.macro_arg.1, self.arg.clone()),
}
- None => (&self.macro_arg.1, self.arg.clone()),
- },
+ }
_ => match origin {
mbe::Origin::Call => (&self.macro_arg.1, self.arg.clone()),
mbe::Origin::Def => match (&*self.macro_def, &self.attr_input_or_mac_def) {
/// `AstId` points to an AST node in any file.
///
/// It is stable across reparses, and can be used as salsa key/value.
-// FIXME: isn't this just a `Source<FileAstId<N>>` ?
pub type AstId<N> = InFile<FileAstId<N>>;
impl<N: AstNode> AstId<N> {
InFile { file_id, value }
}
- // Similarly, naming here is stupid...
pub fn with_value<U>(&self, value: U) -> InFile<U> {
InFile::new(self.file_id, value)
}
}
}
-impl InFile<SyntaxNode> {
+impl<'a> InFile<&'a SyntaxNode> {
pub fn ancestors_with_macros(
self,
db: &dyn db::AstDatabase,
) -> impl Iterator<Item = InFile<SyntaxNode>> + Clone + '_ {
- iter::successors(Some(self), move |node| match node.value.parent() {
+ iter::successors(Some(self.cloned()), move |node| match node.value.parent() {
Some(parent) => Some(node.with_value(parent)),
- None => {
- let parent_node = node.file_id.call_node(db)?;
- Some(parent_node)
- }
+ None => node.file_id.call_node(db),
})
}
self,
db: &dyn db::AstDatabase,
) -> impl Iterator<Item = InFile<SyntaxNode>> + '_ {
- iter::successors(Some(self), move |node| match node.value.parent() {
+ iter::successors(Some(self.cloned()), move |node| match node.value.parent() {
Some(parent) => Some(node.with_value(parent)),
None => {
let parent_node = node.file_id.call_node(db)?;
}
})
}
-}
-impl<'a> InFile<&'a SyntaxNode> {
/// Falls back to the macro call range if the node cannot be mapped up fully.
pub fn original_file_range(self, db: &dyn db::AstDatabase) -> FileRange {
if let Some(res) = self.original_file_range_opt(db) {
}
// Fall back to whole macro call.
- let mut node = self.cloned();
- while let Some(call_node) = node.file_id.call_node(db) {
- node = call_node;
+ match self.file_id.0 {
+ HirFileIdRepr::FileId(file_id) => FileRange { file_id, range: self.value.text_range() },
+ HirFileIdRepr::MacroFile(mac_file) => {
+ let loc = db.lookup_intern_macro_call(mac_file.macro_call_id);
+ loc.kind.original_call_range(db)
+ }
}
-
- let orig_file = node.file_id.original_file(db);
- assert_eq!(node.file_id, orig_file.into());
-
- FileRange { file_id: orig_file, range: node.value.text_range() }
}
/// Attempts to map the syntax node back up its macro calls.
}
}
+impl InFile<SyntaxToken> {
+ pub fn upmap(self, db: &dyn db::AstDatabase) -> Option<InFile<SyntaxToken>> {
+ let expansion = self.file_id.expansion_info(db)?;
+ expansion.map_token_up(db, self.as_ref()).map(|(it, _)| it)
+ }
+}
+
fn ascend_node_border_tokens(
db: &dyn db::AstDatabase,
InFile { file_id, value: node }: InFile<&SyntaxNode>,
) -> Option<InFile<(SyntaxToken, SyntaxToken)>> {
let expansion = file_id.expansion_info(db)?;
- // the input node has only one token ?
- let first = skip_trivia_token(node.first_token()?, Direction::Next)?;
- let last = skip_trivia_token(node.last_token()?, Direction::Prev)?;
- let is_single_token = first == last;
+ let first_token = |node: &SyntaxNode| skip_trivia_token(node.first_token()?, Direction::Next);
+ let last_token = |node: &SyntaxNode| skip_trivia_token(node.last_token()?, Direction::Prev);
- node.descendants().find_map(|it| {
- let first = skip_trivia_token(it.first_token()?, Direction::Next)?;
- let first = ascend_call_token(db, &expansion, InFile::new(file_id, first))?;
-
- let last = skip_trivia_token(it.last_token()?, Direction::Prev)?;
- let last = ascend_call_token(db, &expansion, InFile::new(file_id, last))?;
-
- if (!is_single_token && first == last) || (first.file_id != last.file_id) {
- return None;
- }
-
- Some(InFile::new(first.file_id, (first.value, last.value)))
- })
+ let first = first_token(node)?;
+ let last = last_token(node)?;
+ let first = ascend_call_token(db, &expansion, InFile::new(file_id, first))?;
+ let last = ascend_call_token(db, &expansion, InFile::new(file_id, last))?;
+ (first.file_id == last.file_id).then(|| InFile::new(first.file_id, (first.value, last.value)))
}
fn ascend_call_token(
expansion: &ExpansionInfo,
token: InFile<SyntaxToken>,
) -> Option<InFile<SyntaxToken>> {
- let (mapped, origin) = expansion.map_token_up(db, token.as_ref())?;
- if origin != Origin::Call {
- return None;
- }
- if let Some(info) = mapped.file_id.expansion_info(db) {
- return ascend_call_token(db, &info, mapped);
+ let mut mapping = expansion.map_token_up(db, token.as_ref())?;
+ while let (mapped, Origin::Call) = mapping {
+ match mapped.file_id.expansion_info(db) {
+ Some(info) => mapping = info.map_token_up(db, mapped.as_ref())?,
+ None => return Some(mapped),
+ }
}
- Some(mapped)
+ None
}
impl InFile<SyntaxToken> {
) -> impl Iterator<Item = InFile<SyntaxNode>> + '_ {
self.value.parent().into_iter().flat_map({
let file_id = self.file_id;
- move |parent| InFile::new(file_id, parent).ancestors_with_macros(db)
+ move |parent| InFile::new(file_id, &parent).ancestors_with_macros(db)
})
}
}
}
pub fn original_ast_node(self, db: &dyn db::AstDatabase) -> Option<InFile<N>> {
- match ascend_node_border_tokens(db, self.syntax()) {
- Some(InFile { file_id, value: (first, last) }) => {
- let original_file = file_id.original_file(db);
- if file_id != original_file.into() {
- let range = first.text_range().cover(last.text_range());
- tracing::error!("Failed mapping up more for {:?}", range);
- return None;
- }
- let anc = algo::least_common_ancestor(&first.parent()?, &last.parent()?)?;
- Some(InFile::new(file_id, anc.ancestors().find_map(N::cast)?))
+ // This kind of upmapping can only be achieved in attribute expanded files,
+ // as we don't have node inputs otherwise and therefor can't find an `N` node in the input
+ if !self.file_id.is_macro() {
+ return Some(self);
+ } else if !self.file_id.is_attr_macro(db) {
+ return None;
+ }
+
+ if let Some(InFile { file_id, value: (first, last) }) =
+ ascend_node_border_tokens(db, self.syntax())
+ {
+ if file_id.is_macro() {
+ let range = first.text_range().cover(last.text_range());
+ tracing::error!("Failed mapping out of macro file for {:?}", range);
+ return None;
}
- _ if !self.file_id.is_macro() => Some(self),
- _ => None,
+ // FIXME: This heuristic is brittle and with the right macro may select completely unrelated nodes
+ let anc = algo::least_common_ancestor(&first.parent()?, &last.parent()?)?;
+ let value = anc.ancestors().find_map(N::cast)?;
+ return Some(InFile::new(file_id, value));
}
+ None
}
pub fn syntax(&self) -> InFile<&SyntaxNode> {
self.with_value(self.value.syntax())
}
-
- pub fn nodes_with_attributes<'db>(
- self,
- db: &'db dyn db::AstDatabase,
- ) -> impl Iterator<Item = InFile<N>> + 'db
- where
- N: 'db,
- {
- iter::successors(Some(self), move |node| {
- let InFile { file_id, value } = node.file_id.call_node(db)?;
- N::cast(value).map(|n| InFile::new(file_id, n))
- })
- }
-
- pub fn node_with_attributes(self, db: &dyn db::AstDatabase) -> InFile<N> {
- self.nodes_with_attributes(db).last().unwrap()
- }
}
/// In Rust, macros expand token trees to token trees. When we want to turn a
MACRO_TYPE => ExpandTo::Type,
ARG_LIST | TRY_EXPR | TUPLE_EXPR | PAREN_EXPR | ARRAY_EXPR | FOR_EXPR | PATH_EXPR
- | CLOSURE_EXPR | CONDITION | BREAK_EXPR | RETURN_EXPR | MATCH_EXPR | MATCH_ARM
- | MATCH_GUARD | RECORD_EXPR_FIELD | CALL_EXPR | INDEX_EXPR | METHOD_CALL_EXPR
- | FIELD_EXPR | AWAIT_EXPR | CAST_EXPR | REF_EXPR | PREFIX_EXPR | RANGE_EXPR
- | BIN_EXPR => ExpandTo::Expr,
+ | CLOSURE_EXPR | BREAK_EXPR | RETURN_EXPR | MATCH_EXPR | MATCH_ARM | MATCH_GUARD
+ | RECORD_EXPR_FIELD | CALL_EXPR | INDEX_EXPR | METHOD_CALL_EXPR | FIELD_EXPR
+ | AWAIT_EXPR | CAST_EXPR | REF_EXPR | PREFIX_EXPR | RANGE_EXPR | BIN_EXPR
+ | LET_EXPR => ExpandTo::Expr,
LET_STMT => {
// FIXME: Handle LHS Pattern
ExpandTo::Expr
}
}
}
+
+#[derive(Debug)]
+pub struct UnresolvedMacro {
+ pub path: ModPath,
+}
projects / rust.git / blobdiff