1242 lines
48 KiB
Rust
1242 lines
48 KiB
Rust
//! Lookup hir elements using positions in the source code. This is a lossy
|
|
//! transformation: in general, a single source might correspond to several
|
|
//! modules, functions, etc, due to macros, cfgs and `#[path=]` attributes on
|
|
//! modules.
|
|
//!
|
|
//! So, this modules should not be used during hir construction, it exists
|
|
//! purely for "IDE needs".
|
|
use std::iter::{self, once};
|
|
|
|
use either::Either;
|
|
use hir_def::{
|
|
body::{
|
|
scope::{ExprScopes, ScopeId},
|
|
Body, BodySourceMap,
|
|
},
|
|
hir::{BindingId, ExprId, Pat, PatId},
|
|
lang_item::LangItem,
|
|
lower::LowerCtx,
|
|
nameres::MacroSubNs,
|
|
path::{ModPath, Path, PathKind},
|
|
resolver::{resolver_for_scope, Resolver, TypeNs, ValueNs},
|
|
type_ref::Mutability,
|
|
AsMacroCall, AssocItemId, ConstId, DefWithBodyId, FieldId, FunctionId, ItemContainerId,
|
|
LocalFieldId, Lookup, ModuleDefId, TraitId, VariantId,
|
|
};
|
|
use hir_expand::{
|
|
builtin_fn_macro::BuiltinFnLikeExpander,
|
|
mod_path::path,
|
|
name,
|
|
name::{AsName, Name},
|
|
HirFileId, InFile, MacroFileId, MacroFileIdExt,
|
|
};
|
|
use hir_ty::{
|
|
diagnostics::{
|
|
record_literal_missing_fields, record_pattern_missing_fields, unsafe_expressions,
|
|
UnsafeExpr,
|
|
},
|
|
lang_items::lang_items_for_bin_op,
|
|
method_resolution, Adjustment, InferenceResult, Interner, Substitution, Ty, TyExt, TyKind,
|
|
TyLoweringContext,
|
|
};
|
|
use itertools::Itertools;
|
|
use smallvec::SmallVec;
|
|
use syntax::{
|
|
ast::{self, AstNode},
|
|
SyntaxKind, SyntaxNode, TextRange, TextSize,
|
|
};
|
|
use triomphe::Arc;
|
|
|
|
use crate::{
|
|
db::HirDatabase, semantics::PathResolution, Adt, AssocItem, BindingMode, BuiltinAttr,
|
|
BuiltinType, Callable, Const, DeriveHelper, Field, Function, Local, Macro, ModuleDef, Static,
|
|
Struct, ToolModule, Trait, TraitAlias, TupleField, Type, TypeAlias, Variant,
|
|
};
|
|
|
|
/// `SourceAnalyzer` is a convenience wrapper which exposes HIR API in terms of
|
|
/// original source files. It should not be used inside the HIR itself.
|
|
#[derive(Debug)]
|
|
pub(crate) struct SourceAnalyzer {
|
|
pub(crate) file_id: HirFileId,
|
|
pub(crate) resolver: Resolver,
|
|
def: Option<(DefWithBodyId, Arc<Body>, Arc<BodySourceMap>)>,
|
|
infer: Option<Arc<InferenceResult>>,
|
|
}
|
|
|
|
impl SourceAnalyzer {
|
|
pub(crate) fn new_for_body(
|
|
db: &dyn HirDatabase,
|
|
def: DefWithBodyId,
|
|
node @ InFile { file_id, .. }: InFile<&SyntaxNode>,
|
|
offset: Option<TextSize>,
|
|
) -> SourceAnalyzer {
|
|
let (body, source_map) = db.body_with_source_map(def);
|
|
let scopes = db.expr_scopes(def);
|
|
let scope = match offset {
|
|
None => scope_for(&scopes, &source_map, node),
|
|
Some(offset) => scope_for_offset(db, &scopes, &source_map, node.file_id, offset),
|
|
};
|
|
let resolver = resolver_for_scope(db.upcast(), def, scope);
|
|
SourceAnalyzer {
|
|
resolver,
|
|
def: Some((def, body, source_map)),
|
|
infer: Some(db.infer(def)),
|
|
file_id,
|
|
}
|
|
}
|
|
|
|
pub(crate) fn new_for_body_no_infer(
|
|
db: &dyn HirDatabase,
|
|
def: DefWithBodyId,
|
|
node @ InFile { file_id, .. }: InFile<&SyntaxNode>,
|
|
offset: Option<TextSize>,
|
|
) -> SourceAnalyzer {
|
|
let (body, source_map) = db.body_with_source_map(def);
|
|
let scopes = db.expr_scopes(def);
|
|
let scope = match offset {
|
|
None => scope_for(&scopes, &source_map, node),
|
|
Some(offset) => scope_for_offset(db, &scopes, &source_map, node.file_id, offset),
|
|
};
|
|
let resolver = resolver_for_scope(db.upcast(), def, scope);
|
|
SourceAnalyzer { resolver, def: Some((def, body, source_map)), infer: None, file_id }
|
|
}
|
|
|
|
pub(crate) fn new_for_resolver(
|
|
resolver: Resolver,
|
|
node: InFile<&SyntaxNode>,
|
|
) -> SourceAnalyzer {
|
|
SourceAnalyzer { resolver, def: None, infer: None, file_id: node.file_id }
|
|
}
|
|
|
|
fn body_source_map(&self) -> Option<&BodySourceMap> {
|
|
self.def.as_ref().map(|(.., source_map)| &**source_map)
|
|
}
|
|
fn body(&self) -> Option<&Body> {
|
|
self.def.as_ref().map(|(_, body, _)| &**body)
|
|
}
|
|
|
|
fn expr_id(&self, db: &dyn HirDatabase, expr: &ast::Expr) -> Option<ExprId> {
|
|
let src = match expr {
|
|
ast::Expr::MacroExpr(expr) => {
|
|
self.expand_expr(db, InFile::new(self.file_id, expr.macro_call()?))?
|
|
}
|
|
_ => InFile::new(self.file_id, expr.clone()),
|
|
};
|
|
let sm = self.body_source_map()?;
|
|
sm.node_expr(src.as_ref())
|
|
}
|
|
|
|
fn pat_id(&self, pat: &ast::Pat) -> Option<PatId> {
|
|
// FIXME: macros, see `expr_id`
|
|
let src = InFile { file_id: self.file_id, value: pat };
|
|
self.body_source_map()?.node_pat(src)
|
|
}
|
|
|
|
fn binding_id_of_pat(&self, pat: &ast::IdentPat) -> Option<BindingId> {
|
|
let pat_id = self.pat_id(&pat.clone().into())?;
|
|
if let Pat::Bind { id, .. } = self.body()?.pats[pat_id] {
|
|
Some(id)
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
|
|
fn expand_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
expr: InFile<ast::MacroCall>,
|
|
) -> Option<InFile<ast::Expr>> {
|
|
let macro_file = self.body_source_map()?.node_macro_file(expr.as_ref())?;
|
|
let expanded = db.parse_or_expand(macro_file);
|
|
let res = if let Some(stmts) = ast::MacroStmts::cast(expanded.clone()) {
|
|
match stmts.expr()? {
|
|
ast::Expr::MacroExpr(mac) => {
|
|
self.expand_expr(db, InFile::new(macro_file, mac.macro_call()?))?
|
|
}
|
|
expr => InFile::new(macro_file, expr),
|
|
}
|
|
} else if let Some(call) = ast::MacroCall::cast(expanded.clone()) {
|
|
self.expand_expr(db, InFile::new(macro_file, call))?
|
|
} else {
|
|
InFile::new(macro_file, ast::Expr::cast(expanded)?)
|
|
};
|
|
|
|
Some(res)
|
|
}
|
|
|
|
pub(crate) fn expr_adjustments(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
expr: &ast::Expr,
|
|
) -> Option<&[Adjustment]> {
|
|
let expr_id = self.expr_id(db, expr)?;
|
|
let infer = self.infer.as_ref()?;
|
|
infer.expr_adjustments.get(&expr_id).map(|v| &**v)
|
|
}
|
|
|
|
pub(crate) fn type_of_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
expr: &ast::Expr,
|
|
) -> Option<(Type, Option<Type>)> {
|
|
let expr_id = self.expr_id(db, expr)?;
|
|
let infer = self.infer.as_ref()?;
|
|
let coerced = infer
|
|
.expr_adjustments
|
|
.get(&expr_id)
|
|
.and_then(|adjusts| adjusts.last().map(|adjust| adjust.target.clone()));
|
|
let ty = infer[expr_id].clone();
|
|
let mk_ty = |ty| Type::new_with_resolver(db, &self.resolver, ty);
|
|
Some((mk_ty(ty), coerced.map(mk_ty)))
|
|
}
|
|
|
|
pub(crate) fn type_of_pat(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
pat: &ast::Pat,
|
|
) -> Option<(Type, Option<Type>)> {
|
|
let pat_id = self.pat_id(pat)?;
|
|
let infer = self.infer.as_ref()?;
|
|
let coerced =
|
|
infer.pat_adjustments.get(&pat_id).and_then(|adjusts| adjusts.last().cloned());
|
|
let ty = infer[pat_id].clone();
|
|
let mk_ty = |ty| Type::new_with_resolver(db, &self.resolver, ty);
|
|
Some((mk_ty(ty), coerced.map(mk_ty)))
|
|
}
|
|
|
|
pub(crate) fn type_of_binding_in_pat(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
pat: &ast::IdentPat,
|
|
) -> Option<Type> {
|
|
let binding_id = self.binding_id_of_pat(pat)?;
|
|
let infer = self.infer.as_ref()?;
|
|
let ty = infer[binding_id].clone();
|
|
let mk_ty = |ty| Type::new_with_resolver(db, &self.resolver, ty);
|
|
Some(mk_ty(ty))
|
|
}
|
|
|
|
pub(crate) fn type_of_self(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
param: &ast::SelfParam,
|
|
) -> Option<Type> {
|
|
let src = InFile { file_id: self.file_id, value: param };
|
|
let pat_id = self.body_source_map()?.node_self_param(src)?;
|
|
let ty = self.infer.as_ref()?[pat_id].clone();
|
|
Some(Type::new_with_resolver(db, &self.resolver, ty))
|
|
}
|
|
|
|
pub(crate) fn binding_mode_of_pat(
|
|
&self,
|
|
_db: &dyn HirDatabase,
|
|
pat: &ast::IdentPat,
|
|
) -> Option<BindingMode> {
|
|
let id = self.pat_id(&pat.clone().into())?;
|
|
let infer = self.infer.as_ref()?;
|
|
infer.binding_modes.get(id).map(|bm| match bm {
|
|
hir_ty::BindingMode::Move => BindingMode::Move,
|
|
hir_ty::BindingMode::Ref(hir_ty::Mutability::Mut) => BindingMode::Ref(Mutability::Mut),
|
|
hir_ty::BindingMode::Ref(hir_ty::Mutability::Not) => {
|
|
BindingMode::Ref(Mutability::Shared)
|
|
}
|
|
})
|
|
}
|
|
pub(crate) fn pattern_adjustments(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
pat: &ast::Pat,
|
|
) -> Option<SmallVec<[Type; 1]>> {
|
|
let pat_id = self.pat_id(pat)?;
|
|
let infer = self.infer.as_ref()?;
|
|
Some(
|
|
infer
|
|
.pat_adjustments
|
|
.get(&pat_id)?
|
|
.iter()
|
|
.map(|ty| Type::new_with_resolver(db, &self.resolver, ty.clone()))
|
|
.collect(),
|
|
)
|
|
}
|
|
|
|
pub(crate) fn resolve_method_call_as_callable(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
call: &ast::MethodCallExpr,
|
|
) -> Option<Callable> {
|
|
let expr_id = self.expr_id(db, &call.clone().into())?;
|
|
let (func, substs) = self.infer.as_ref()?.method_resolution(expr_id)?;
|
|
let ty = db.value_ty(func.into())?.substitute(Interner, &substs);
|
|
let ty = Type::new_with_resolver(db, &self.resolver, ty);
|
|
let mut res = ty.as_callable(db)?;
|
|
res.is_bound_method = true;
|
|
Some(res)
|
|
}
|
|
|
|
pub(crate) fn resolve_method_call(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
call: &ast::MethodCallExpr,
|
|
) -> Option<Function> {
|
|
let expr_id = self.expr_id(db, &call.clone().into())?;
|
|
let (f_in_trait, substs) = self.infer.as_ref()?.method_resolution(expr_id)?;
|
|
|
|
Some(self.resolve_impl_method_or_trait_def(db, f_in_trait, substs).into())
|
|
}
|
|
|
|
pub(crate) fn resolve_method_call_fallback(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
call: &ast::MethodCallExpr,
|
|
) -> Option<Either<Function, Field>> {
|
|
let expr_id = self.expr_id(db, &call.clone().into())?;
|
|
let inference_result = self.infer.as_ref()?;
|
|
match inference_result.method_resolution(expr_id) {
|
|
Some((f_in_trait, substs)) => Some(Either::Left(
|
|
self.resolve_impl_method_or_trait_def(db, f_in_trait, substs).into(),
|
|
)),
|
|
None => inference_result
|
|
.field_resolution(expr_id)
|
|
.and_then(Either::left)
|
|
.map(Into::into)
|
|
.map(Either::Right),
|
|
}
|
|
}
|
|
|
|
pub(crate) fn resolve_field(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
field: &ast::FieldExpr,
|
|
) -> Option<Either<Field, TupleField>> {
|
|
let &(def, ..) = self.def.as_ref()?;
|
|
let expr_id = self.expr_id(db, &field.clone().into())?;
|
|
self.infer.as_ref()?.field_resolution(expr_id).map(|it| {
|
|
it.map_either(Into::into, |f| TupleField { owner: def, tuple: f.tuple, index: f.index })
|
|
})
|
|
}
|
|
|
|
pub(crate) fn resolve_field_fallback(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
field: &ast::FieldExpr,
|
|
) -> Option<Either<Either<Field, TupleField>, Function>> {
|
|
let &(def, ..) = self.def.as_ref()?;
|
|
let expr_id = self.expr_id(db, &field.clone().into())?;
|
|
let inference_result = self.infer.as_ref()?;
|
|
match inference_result.field_resolution(expr_id) {
|
|
Some(field) => Some(Either::Left(field.map_either(Into::into, |f| TupleField {
|
|
owner: def,
|
|
tuple: f.tuple,
|
|
index: f.index,
|
|
}))),
|
|
None => inference_result.method_resolution(expr_id).map(|(f, substs)| {
|
|
Either::Right(self.resolve_impl_method_or_trait_def(db, f, substs).into())
|
|
}),
|
|
}
|
|
}
|
|
|
|
pub(crate) fn resolve_await_to_poll(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
await_expr: &ast::AwaitExpr,
|
|
) -> Option<FunctionId> {
|
|
let mut ty = self.ty_of_expr(db, &await_expr.expr()?)?.clone();
|
|
|
|
let into_future_trait = self
|
|
.resolver
|
|
.resolve_known_trait(db.upcast(), &path![core::future::IntoFuture])
|
|
.map(Trait::from);
|
|
|
|
if let Some(into_future_trait) = into_future_trait {
|
|
let type_ = Type::new_with_resolver(db, &self.resolver, ty.clone());
|
|
if type_.impls_trait(db, into_future_trait, &[]) {
|
|
let items = into_future_trait.items(db);
|
|
let into_future_type = items.into_iter().find_map(|item| match item {
|
|
AssocItem::TypeAlias(alias)
|
|
if alias.name(db) == hir_expand::name![IntoFuture] =>
|
|
{
|
|
Some(alias)
|
|
}
|
|
_ => None,
|
|
})?;
|
|
let future_trait = type_.normalize_trait_assoc_type(db, &[], into_future_type)?;
|
|
ty = future_trait.ty;
|
|
}
|
|
}
|
|
|
|
let future_trait = db.lang_item(self.resolver.krate(), LangItem::Future)?.as_trait()?;
|
|
let poll_fn = db.lang_item(self.resolver.krate(), LangItem::FuturePoll)?.as_function()?;
|
|
// HACK: subst for `poll()` coincides with that for `Future` because `poll()` itself
|
|
// doesn't have any generic parameters, so we skip building another subst for `poll()`.
|
|
let substs = hir_ty::TyBuilder::subst_for_def(db, future_trait, None).push(ty).build();
|
|
Some(self.resolve_impl_method_or_trait_def(db, poll_fn, substs))
|
|
}
|
|
|
|
pub(crate) fn resolve_prefix_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
prefix_expr: &ast::PrefixExpr,
|
|
) -> Option<FunctionId> {
|
|
let (lang_item, fn_name) = match prefix_expr.op_kind()? {
|
|
ast::UnaryOp::Deref => (LangItem::Deref, name![deref]),
|
|
ast::UnaryOp::Not => (LangItem::Not, name![not]),
|
|
ast::UnaryOp::Neg => (LangItem::Neg, name![neg]),
|
|
};
|
|
let ty = self.ty_of_expr(db, &prefix_expr.expr()?)?;
|
|
|
|
let (op_trait, op_fn) = self.lang_trait_fn(db, lang_item, &fn_name)?;
|
|
// HACK: subst for all methods coincides with that for their trait because the methods
|
|
// don't have any generic parameters, so we skip building another subst for the methods.
|
|
let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None).push(ty.clone()).build();
|
|
|
|
Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
|
|
}
|
|
|
|
pub(crate) fn resolve_index_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
index_expr: &ast::IndexExpr,
|
|
) -> Option<FunctionId> {
|
|
let base_ty = self.ty_of_expr(db, &index_expr.base()?)?;
|
|
let index_ty = self.ty_of_expr(db, &index_expr.index()?)?;
|
|
|
|
let (op_trait, op_fn) = self.lang_trait_fn(db, LangItem::Index, &name![index])?;
|
|
// HACK: subst for all methods coincides with that for their trait because the methods
|
|
// don't have any generic parameters, so we skip building another subst for the methods.
|
|
let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None)
|
|
.push(base_ty.clone())
|
|
.push(index_ty.clone())
|
|
.build();
|
|
Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
|
|
}
|
|
|
|
pub(crate) fn resolve_bin_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
binop_expr: &ast::BinExpr,
|
|
) -> Option<FunctionId> {
|
|
let op = binop_expr.op_kind()?;
|
|
let lhs = self.ty_of_expr(db, &binop_expr.lhs()?)?;
|
|
let rhs = self.ty_of_expr(db, &binop_expr.rhs()?)?;
|
|
|
|
let (op_trait, op_fn) = lang_items_for_bin_op(op)
|
|
.and_then(|(name, lang_item)| self.lang_trait_fn(db, lang_item, &name))?;
|
|
// HACK: subst for `index()` coincides with that for `Index` because `index()` itself
|
|
// doesn't have any generic parameters, so we skip building another subst for `index()`.
|
|
let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None)
|
|
.push(lhs.clone())
|
|
.push(rhs.clone())
|
|
.build();
|
|
|
|
Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
|
|
}
|
|
|
|
pub(crate) fn resolve_try_expr(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
try_expr: &ast::TryExpr,
|
|
) -> Option<FunctionId> {
|
|
let ty = self.ty_of_expr(db, &try_expr.expr()?)?;
|
|
|
|
let op_fn = db.lang_item(self.resolver.krate(), LangItem::TryTraitBranch)?.as_function()?;
|
|
let op_trait = match op_fn.lookup(db.upcast()).container {
|
|
ItemContainerId::TraitId(id) => id,
|
|
_ => return None,
|
|
};
|
|
// HACK: subst for `branch()` coincides with that for `Try` because `branch()` itself
|
|
// doesn't have any generic parameters, so we skip building another subst for `branch()`.
|
|
let substs = hir_ty::TyBuilder::subst_for_def(db, op_trait, None).push(ty.clone()).build();
|
|
|
|
Some(self.resolve_impl_method_or_trait_def(db, op_fn, substs))
|
|
}
|
|
|
|
pub(crate) fn resolve_record_field(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
field: &ast::RecordExprField,
|
|
) -> Option<(Field, Option<Local>, Type)> {
|
|
let record_expr = ast::RecordExpr::cast(field.syntax().parent().and_then(|p| p.parent())?)?;
|
|
let expr = ast::Expr::from(record_expr);
|
|
let expr_id = self.body_source_map()?.node_expr(InFile::new(self.file_id, &expr))?;
|
|
|
|
let local_name = field.field_name()?.as_name();
|
|
let local = if field.name_ref().is_some() {
|
|
None
|
|
} else {
|
|
// Shorthand syntax, resolve to the local
|
|
let path = Path::from_known_path_with_no_generic(ModPath::from_segments(
|
|
PathKind::Plain,
|
|
once(local_name.clone()),
|
|
));
|
|
match self.resolver.resolve_path_in_value_ns_fully(db.upcast(), &path) {
|
|
Some(ValueNs::LocalBinding(binding_id)) => {
|
|
Some(Local { binding_id, parent: self.resolver.body_owner()? })
|
|
}
|
|
_ => None,
|
|
}
|
|
};
|
|
let (_, subst) = self.infer.as_ref()?.type_of_expr.get(expr_id)?.as_adt()?;
|
|
let variant = self.infer.as_ref()?.variant_resolution_for_expr(expr_id)?;
|
|
let variant_data = variant.variant_data(db.upcast());
|
|
let field = FieldId { parent: variant, local_id: variant_data.field(&local_name)? };
|
|
let field_ty =
|
|
db.field_types(variant).get(field.local_id)?.clone().substitute(Interner, subst);
|
|
Some((field.into(), local, Type::new_with_resolver(db, &self.resolver, field_ty)))
|
|
}
|
|
|
|
pub(crate) fn resolve_record_pat_field(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
field: &ast::RecordPatField,
|
|
) -> Option<(Field, Type)> {
|
|
let field_name = field.field_name()?.as_name();
|
|
let record_pat = ast::RecordPat::cast(field.syntax().parent().and_then(|p| p.parent())?)?;
|
|
let pat_id = self.pat_id(&record_pat.into())?;
|
|
let variant = self.infer.as_ref()?.variant_resolution_for_pat(pat_id)?;
|
|
let variant_data = variant.variant_data(db.upcast());
|
|
let field = FieldId { parent: variant, local_id: variant_data.field(&field_name)? };
|
|
let (_, subst) = self.infer.as_ref()?.type_of_pat.get(pat_id)?.as_adt()?;
|
|
let field_ty =
|
|
db.field_types(variant).get(field.local_id)?.clone().substitute(Interner, subst);
|
|
Some((field.into(), Type::new_with_resolver(db, &self.resolver, field_ty)))
|
|
}
|
|
|
|
pub(crate) fn resolve_macro_call(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
macro_call: InFile<&ast::MacroCall>,
|
|
) -> Option<Macro> {
|
|
let ctx = LowerCtx::with_file_id(db.upcast(), macro_call.file_id);
|
|
let path = macro_call.value.path().and_then(|ast| Path::from_src(&ctx, ast))?;
|
|
self.resolver
|
|
.resolve_path_as_macro(db.upcast(), path.mod_path()?, Some(MacroSubNs::Bang))
|
|
.map(|(it, _)| it.into())
|
|
}
|
|
|
|
pub(crate) fn resolve_bind_pat_to_const(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
pat: &ast::IdentPat,
|
|
) -> Option<ModuleDef> {
|
|
let pat_id = self.pat_id(&pat.clone().into())?;
|
|
let body = self.body()?;
|
|
let path = match &body[pat_id] {
|
|
Pat::Path(path) => path,
|
|
_ => return None,
|
|
};
|
|
let res = resolve_hir_path(db, &self.resolver, path)?;
|
|
match res {
|
|
PathResolution::Def(def) => Some(def),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub(crate) fn resolve_path(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
path: &ast::Path,
|
|
) -> Option<PathResolution> {
|
|
let parent = path.syntax().parent();
|
|
let parent = || parent.clone();
|
|
|
|
let mut prefer_value_ns = false;
|
|
let resolved = (|| {
|
|
let infer = self.infer.as_deref()?;
|
|
if let Some(path_expr) = parent().and_then(ast::PathExpr::cast) {
|
|
let expr_id = self.expr_id(db, &path_expr.into())?;
|
|
if let Some((assoc, subs)) = infer.assoc_resolutions_for_expr(expr_id) {
|
|
let assoc = match assoc {
|
|
AssocItemId::FunctionId(f_in_trait) => {
|
|
match infer.type_of_expr.get(expr_id) {
|
|
None => assoc,
|
|
Some(func_ty) => {
|
|
if let TyKind::FnDef(_fn_def, subs) = func_ty.kind(Interner) {
|
|
self.resolve_impl_method_or_trait_def(
|
|
db,
|
|
f_in_trait,
|
|
subs.clone(),
|
|
)
|
|
.into()
|
|
} else {
|
|
assoc
|
|
}
|
|
}
|
|
}
|
|
}
|
|
AssocItemId::ConstId(const_id) => {
|
|
self.resolve_impl_const_or_trait_def(db, const_id, subs).into()
|
|
}
|
|
assoc => assoc,
|
|
};
|
|
|
|
return Some(PathResolution::Def(AssocItem::from(assoc).into()));
|
|
}
|
|
if let Some(VariantId::EnumVariantId(variant)) =
|
|
infer.variant_resolution_for_expr(expr_id)
|
|
{
|
|
return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
|
|
}
|
|
prefer_value_ns = true;
|
|
} else if let Some(path_pat) = parent().and_then(ast::PathPat::cast) {
|
|
let pat_id = self.pat_id(&path_pat.into())?;
|
|
if let Some((assoc, subs)) = infer.assoc_resolutions_for_pat(pat_id) {
|
|
let assoc = match assoc {
|
|
AssocItemId::ConstId(const_id) => {
|
|
self.resolve_impl_const_or_trait_def(db, const_id, subs).into()
|
|
}
|
|
assoc => assoc,
|
|
};
|
|
return Some(PathResolution::Def(AssocItem::from(assoc).into()));
|
|
}
|
|
if let Some(VariantId::EnumVariantId(variant)) =
|
|
infer.variant_resolution_for_pat(pat_id)
|
|
{
|
|
return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
|
|
}
|
|
} else if let Some(rec_lit) = parent().and_then(ast::RecordExpr::cast) {
|
|
let expr_id = self.expr_id(db, &rec_lit.into())?;
|
|
if let Some(VariantId::EnumVariantId(variant)) =
|
|
infer.variant_resolution_for_expr(expr_id)
|
|
{
|
|
return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
|
|
}
|
|
} else {
|
|
let record_pat = parent().and_then(ast::RecordPat::cast).map(ast::Pat::from);
|
|
let tuple_struct_pat =
|
|
|| parent().and_then(ast::TupleStructPat::cast).map(ast::Pat::from);
|
|
if let Some(pat) = record_pat.or_else(tuple_struct_pat) {
|
|
let pat_id = self.pat_id(&pat)?;
|
|
let variant_res_for_pat = infer.variant_resolution_for_pat(pat_id);
|
|
if let Some(VariantId::EnumVariantId(variant)) = variant_res_for_pat {
|
|
return Some(PathResolution::Def(ModuleDef::Variant(variant.into())));
|
|
}
|
|
}
|
|
}
|
|
None
|
|
})();
|
|
if resolved.is_some() {
|
|
return resolved;
|
|
}
|
|
|
|
// This must be a normal source file rather than macro file.
|
|
let ctx = LowerCtx::with_span_map(db.upcast(), db.span_map(self.file_id));
|
|
let hir_path = Path::from_src(&ctx, path.clone())?;
|
|
|
|
// Case where path is a qualifier of a use tree, e.g. foo::bar::{Baz, Qux} where we are
|
|
// trying to resolve foo::bar.
|
|
if let Some(use_tree) = parent().and_then(ast::UseTree::cast) {
|
|
if use_tree.coloncolon_token().is_some() {
|
|
return resolve_hir_path_qualifier(db, &self.resolver, &hir_path);
|
|
}
|
|
}
|
|
|
|
let meta_path = path
|
|
.syntax()
|
|
.ancestors()
|
|
.take_while(|it| {
|
|
let kind = it.kind();
|
|
ast::Path::can_cast(kind) || ast::Meta::can_cast(kind)
|
|
})
|
|
.last()
|
|
.and_then(ast::Meta::cast);
|
|
|
|
// Case where path is a qualifier of another path, e.g. foo::bar::Baz where we are
|
|
// trying to resolve foo::bar.
|
|
if path.parent_path().is_some() {
|
|
return match resolve_hir_path_qualifier(db, &self.resolver, &hir_path) {
|
|
None if meta_path.is_some() => {
|
|
path.first_segment().and_then(|it| it.name_ref()).and_then(|name_ref| {
|
|
ToolModule::by_name(db, self.resolver.krate().into(), &name_ref.text())
|
|
.map(PathResolution::ToolModule)
|
|
})
|
|
}
|
|
res => res,
|
|
};
|
|
} else if let Some(meta_path) = meta_path {
|
|
// Case where we are resolving the final path segment of a path in an attribute
|
|
// in this case we have to check for inert/builtin attributes and tools and prioritize
|
|
// resolution of attributes over other namespaces
|
|
if let Some(name_ref) = path.as_single_name_ref() {
|
|
let builtin =
|
|
BuiltinAttr::by_name(db, self.resolver.krate().into(), &name_ref.text());
|
|
if builtin.is_some() {
|
|
return builtin.map(PathResolution::BuiltinAttr);
|
|
}
|
|
|
|
if let Some(attr) = meta_path.parent_attr() {
|
|
let adt = if let Some(field) =
|
|
attr.syntax().parent().and_then(ast::RecordField::cast)
|
|
{
|
|
field.syntax().ancestors().take(4).find_map(ast::Adt::cast)
|
|
} else if let Some(field) =
|
|
attr.syntax().parent().and_then(ast::TupleField::cast)
|
|
{
|
|
field.syntax().ancestors().take(4).find_map(ast::Adt::cast)
|
|
} else if let Some(variant) =
|
|
attr.syntax().parent().and_then(ast::Variant::cast)
|
|
{
|
|
variant.syntax().ancestors().nth(2).and_then(ast::Adt::cast)
|
|
} else {
|
|
None
|
|
};
|
|
if let Some(adt) = adt {
|
|
let ast_id = db.ast_id_map(self.file_id).ast_id(&adt);
|
|
if let Some(helpers) = self
|
|
.resolver
|
|
.def_map()
|
|
.derive_helpers_in_scope(InFile::new(self.file_id, ast_id))
|
|
{
|
|
// FIXME: Multiple derives can have the same helper
|
|
let name_ref = name_ref.as_name();
|
|
for (macro_id, mut helpers) in
|
|
helpers.iter().group_by(|(_, macro_id, ..)| macro_id).into_iter()
|
|
{
|
|
if let Some(idx) = helpers.position(|(name, ..)| *name == name_ref)
|
|
{
|
|
return Some(PathResolution::DeriveHelper(DeriveHelper {
|
|
derive: *macro_id,
|
|
idx: idx as u32,
|
|
}));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return match resolve_hir_path_as_attr_macro(db, &self.resolver, &hir_path) {
|
|
Some(m) => Some(PathResolution::Def(ModuleDef::Macro(m))),
|
|
// this labels any path that starts with a tool module as the tool itself, this is technically wrong
|
|
// but there is no benefit in differentiating these two cases for the time being
|
|
None => path.first_segment().and_then(|it| it.name_ref()).and_then(|name_ref| {
|
|
ToolModule::by_name(db, self.resolver.krate().into(), &name_ref.text())
|
|
.map(PathResolution::ToolModule)
|
|
}),
|
|
};
|
|
}
|
|
if parent().map_or(false, |it| ast::Visibility::can_cast(it.kind())) {
|
|
resolve_hir_path_qualifier(db, &self.resolver, &hir_path)
|
|
} else {
|
|
resolve_hir_path_(db, &self.resolver, &hir_path, prefer_value_ns)
|
|
}
|
|
}
|
|
|
|
pub(crate) fn record_literal_missing_fields(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
literal: &ast::RecordExpr,
|
|
) -> Option<Vec<(Field, Type)>> {
|
|
let body = self.body()?;
|
|
let infer = self.infer.as_ref()?;
|
|
|
|
let expr_id = self.expr_id(db, &literal.clone().into())?;
|
|
let substs = infer.type_of_expr[expr_id].as_adt()?.1;
|
|
|
|
let (variant, missing_fields, _exhaustive) =
|
|
record_literal_missing_fields(db, infer, expr_id, &body[expr_id])?;
|
|
let res = self.missing_fields(db, substs, variant, missing_fields);
|
|
Some(res)
|
|
}
|
|
|
|
pub(crate) fn record_pattern_missing_fields(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
pattern: &ast::RecordPat,
|
|
) -> Option<Vec<(Field, Type)>> {
|
|
let body = self.body()?;
|
|
let infer = self.infer.as_ref()?;
|
|
|
|
let pat_id = self.pat_id(&pattern.clone().into())?;
|
|
let substs = infer.type_of_pat[pat_id].as_adt()?.1;
|
|
|
|
let (variant, missing_fields, _exhaustive) =
|
|
record_pattern_missing_fields(db, infer, pat_id, &body[pat_id])?;
|
|
let res = self.missing_fields(db, substs, variant, missing_fields);
|
|
Some(res)
|
|
}
|
|
|
|
fn missing_fields(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
substs: &Substitution,
|
|
variant: VariantId,
|
|
missing_fields: Vec<LocalFieldId>,
|
|
) -> Vec<(Field, Type)> {
|
|
let field_types = db.field_types(variant);
|
|
|
|
missing_fields
|
|
.into_iter()
|
|
.map(|local_id| {
|
|
let field = FieldId { parent: variant, local_id };
|
|
let ty = field_types[local_id].clone().substitute(Interner, substs);
|
|
(field.into(), Type::new_with_resolver_inner(db, &self.resolver, ty))
|
|
})
|
|
.collect()
|
|
}
|
|
|
|
pub(crate) fn expand(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
macro_call: InFile<&ast::MacroCall>,
|
|
) -> Option<MacroFileId> {
|
|
let krate = self.resolver.krate();
|
|
let macro_call_id = macro_call.as_call_id(db.upcast(), krate, |path| {
|
|
self.resolver.resolve_path_as_macro_def(db.upcast(), &path, Some(MacroSubNs::Bang))
|
|
})?;
|
|
// why the 64?
|
|
Some(macro_call_id.as_macro_file()).filter(|it| it.expansion_level(db.upcast()) < 64)
|
|
}
|
|
|
|
pub(crate) fn resolve_variant(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
record_lit: ast::RecordExpr,
|
|
) -> Option<VariantId> {
|
|
let infer = self.infer.as_ref()?;
|
|
let expr_id = self.expr_id(db, &record_lit.into())?;
|
|
infer.variant_resolution_for_expr(expr_id)
|
|
}
|
|
|
|
pub(crate) fn is_unsafe_macro_call(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
macro_call: InFile<&ast::MacroCall>,
|
|
) -> bool {
|
|
// check for asm/global_asm
|
|
if let Some(mac) = self.resolve_macro_call(db, macro_call) {
|
|
let ex = match mac.id {
|
|
hir_def::MacroId::Macro2Id(it) => it.lookup(db.upcast()).expander,
|
|
hir_def::MacroId::MacroRulesId(it) => it.lookup(db.upcast()).expander,
|
|
_ => hir_def::MacroExpander::Declarative,
|
|
};
|
|
match ex {
|
|
hir_def::MacroExpander::BuiltIn(e)
|
|
if e == BuiltinFnLikeExpander::Asm || e == BuiltinFnLikeExpander::GlobalAsm =>
|
|
{
|
|
return true
|
|
}
|
|
_ => (),
|
|
}
|
|
}
|
|
let macro_expr = match macro_call
|
|
.map(|it| it.syntax().parent().and_then(ast::MacroExpr::cast))
|
|
.transpose()
|
|
{
|
|
Some(it) => it,
|
|
None => return false,
|
|
};
|
|
|
|
if let (Some((def, body, sm)), Some(infer)) = (&self.def, &self.infer) {
|
|
if let Some(expanded_expr) = sm.macro_expansion_expr(macro_expr.as_ref()) {
|
|
let mut is_unsafe = false;
|
|
unsafe_expressions(
|
|
db,
|
|
infer,
|
|
*def,
|
|
body,
|
|
expanded_expr,
|
|
&mut |UnsafeExpr { inside_unsafe_block, .. }| is_unsafe |= !inside_unsafe_block,
|
|
);
|
|
return is_unsafe;
|
|
}
|
|
}
|
|
false
|
|
}
|
|
|
|
pub(crate) fn resolve_offset_in_format_args(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
format_args: InFile<&ast::FormatArgsExpr>,
|
|
offset: TextSize,
|
|
) -> Option<(TextRange, Option<PathResolution>)> {
|
|
let implicits = self.body_source_map()?.implicit_format_args(format_args)?;
|
|
implicits.iter().find(|(range, _)| range.contains_inclusive(offset)).map(|(range, name)| {
|
|
(
|
|
*range,
|
|
resolve_hir_value_path(
|
|
db,
|
|
&self.resolver,
|
|
self.resolver.body_owner(),
|
|
&Path::from_known_path_with_no_generic(ModPath::from_segments(
|
|
PathKind::Plain,
|
|
Some(name.clone()),
|
|
)),
|
|
),
|
|
)
|
|
})
|
|
}
|
|
|
|
pub(crate) fn as_format_args_parts<'a>(
|
|
&'a self,
|
|
db: &'a dyn HirDatabase,
|
|
format_args: InFile<&ast::FormatArgsExpr>,
|
|
) -> Option<impl Iterator<Item = (TextRange, Option<PathResolution>)> + 'a> {
|
|
Some(self.body_source_map()?.implicit_format_args(format_args)?.iter().map(
|
|
move |(range, name)| {
|
|
(
|
|
*range,
|
|
resolve_hir_value_path(
|
|
db,
|
|
&self.resolver,
|
|
self.resolver.body_owner(),
|
|
&Path::from_known_path_with_no_generic(ModPath::from_segments(
|
|
PathKind::Plain,
|
|
Some(name.clone()),
|
|
)),
|
|
),
|
|
)
|
|
},
|
|
))
|
|
}
|
|
|
|
fn resolve_impl_method_or_trait_def(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
func: FunctionId,
|
|
substs: Substitution,
|
|
) -> FunctionId {
|
|
let owner = match self.resolver.body_owner() {
|
|
Some(it) => it,
|
|
None => return func,
|
|
};
|
|
let env = db.trait_environment_for_body(owner);
|
|
db.lookup_impl_method(env, func, substs).0
|
|
}
|
|
|
|
fn resolve_impl_const_or_trait_def(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
const_id: ConstId,
|
|
subs: Substitution,
|
|
) -> ConstId {
|
|
let owner = match self.resolver.body_owner() {
|
|
Some(it) => it,
|
|
None => return const_id,
|
|
};
|
|
let env = db.trait_environment_for_body(owner);
|
|
method_resolution::lookup_impl_const(db, env, const_id, subs).0
|
|
}
|
|
|
|
fn lang_trait_fn(
|
|
&self,
|
|
db: &dyn HirDatabase,
|
|
lang_trait: LangItem,
|
|
method_name: &Name,
|
|
) -> Option<(TraitId, FunctionId)> {
|
|
let trait_id = db.lang_item(self.resolver.krate(), lang_trait)?.as_trait()?;
|
|
let fn_id = db.trait_data(trait_id).method_by_name(method_name)?;
|
|
Some((trait_id, fn_id))
|
|
}
|
|
|
|
fn ty_of_expr(&self, db: &dyn HirDatabase, expr: &ast::Expr) -> Option<&Ty> {
|
|
self.infer.as_ref()?.type_of_expr.get(self.expr_id(db, expr)?)
|
|
}
|
|
}
|
|
|
|
fn scope_for(
|
|
scopes: &ExprScopes,
|
|
source_map: &BodySourceMap,
|
|
node: InFile<&SyntaxNode>,
|
|
) -> Option<ScopeId> {
|
|
node.value
|
|
.ancestors()
|
|
.filter_map(ast::Expr::cast)
|
|
.filter_map(|it| source_map.node_expr(InFile::new(node.file_id, &it)))
|
|
.find_map(|it| scopes.scope_for(it))
|
|
}
|
|
|
|
fn scope_for_offset(
|
|
db: &dyn HirDatabase,
|
|
scopes: &ExprScopes,
|
|
source_map: &BodySourceMap,
|
|
from_file: HirFileId,
|
|
offset: TextSize,
|
|
) -> Option<ScopeId> {
|
|
scopes
|
|
.scope_by_expr()
|
|
.iter()
|
|
.filter_map(|(id, scope)| {
|
|
let InFile { file_id, value } = source_map.expr_syntax(id).ok()?;
|
|
if from_file == file_id {
|
|
return Some((value.text_range(), scope));
|
|
}
|
|
|
|
// FIXME handle attribute expansion
|
|
let source =
|
|
iter::successors(file_id.macro_file().map(|it| it.call_node(db.upcast())), |it| {
|
|
Some(it.file_id.macro_file()?.call_node(db.upcast()))
|
|
})
|
|
.find(|it| it.file_id == from_file)
|
|
.filter(|it| it.value.kind() == SyntaxKind::MACRO_CALL)?;
|
|
Some((source.value.text_range(), scope))
|
|
})
|
|
.filter(|(expr_range, _scope)| expr_range.start() <= offset && offset <= expr_range.end())
|
|
// find containing scope
|
|
.min_by_key(|(expr_range, _scope)| expr_range.len())
|
|
.map(|(expr_range, scope)| {
|
|
adjust(db, scopes, source_map, expr_range, from_file, offset).unwrap_or(*scope)
|
|
})
|
|
}
|
|
|
|
// XXX: during completion, cursor might be outside of any particular
|
|
// expression. Try to figure out the correct scope...
|
|
fn adjust(
|
|
db: &dyn HirDatabase,
|
|
scopes: &ExprScopes,
|
|
source_map: &BodySourceMap,
|
|
expr_range: TextRange,
|
|
from_file: HirFileId,
|
|
offset: TextSize,
|
|
) -> Option<ScopeId> {
|
|
let child_scopes = scopes
|
|
.scope_by_expr()
|
|
.iter()
|
|
.filter_map(|(id, scope)| {
|
|
let source = source_map.expr_syntax(id).ok()?;
|
|
// FIXME: correctly handle macro expansion
|
|
if source.file_id != from_file {
|
|
return None;
|
|
}
|
|
let root = source.file_syntax(db.upcast());
|
|
let node = source.value.to_node(&root);
|
|
Some((node.syntax().text_range(), scope))
|
|
})
|
|
.filter(|&(range, _)| {
|
|
range.start() <= offset && expr_range.contains_range(range) && range != expr_range
|
|
});
|
|
|
|
child_scopes
|
|
.max_by(|&(r1, _), &(r2, _)| {
|
|
if r1.contains_range(r2) {
|
|
std::cmp::Ordering::Greater
|
|
} else if r2.contains_range(r1) {
|
|
std::cmp::Ordering::Less
|
|
} else {
|
|
r1.start().cmp(&r2.start())
|
|
}
|
|
})
|
|
.map(|(_ptr, scope)| *scope)
|
|
}
|
|
|
|
#[inline]
|
|
pub(crate) fn resolve_hir_path(
|
|
db: &dyn HirDatabase,
|
|
resolver: &Resolver,
|
|
path: &Path,
|
|
) -> Option<PathResolution> {
|
|
resolve_hir_path_(db, resolver, path, false)
|
|
}
|
|
|
|
#[inline]
|
|
pub(crate) fn resolve_hir_path_as_attr_macro(
|
|
db: &dyn HirDatabase,
|
|
resolver: &Resolver,
|
|
path: &Path,
|
|
) -> Option<Macro> {
|
|
resolver
|
|
.resolve_path_as_macro(db.upcast(), path.mod_path()?, Some(MacroSubNs::Attr))
|
|
.map(|(it, _)| it)
|
|
.map(Into::into)
|
|
}
|
|
|
|
fn resolve_hir_path_(
|
|
db: &dyn HirDatabase,
|
|
resolver: &Resolver,
|
|
path: &Path,
|
|
prefer_value_ns: bool,
|
|
) -> Option<PathResolution> {
|
|
let types = || {
|
|
let (ty, unresolved) = match path.type_anchor() {
|
|
Some(type_ref) => {
|
|
let (_, res) =
|
|
TyLoweringContext::new_maybe_unowned(db, resolver, resolver.type_owner())
|
|
.lower_ty_ext(type_ref);
|
|
res.map(|ty_ns| (ty_ns, path.segments().first()))
|
|
}
|
|
None => {
|
|
let (ty, remaining_idx, _) = resolver.resolve_path_in_type_ns(db.upcast(), path)?;
|
|
match remaining_idx {
|
|
Some(remaining_idx) => {
|
|
if remaining_idx + 1 == path.segments().len() {
|
|
Some((ty, path.segments().last()))
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
None => Some((ty, None)),
|
|
}
|
|
}
|
|
}?;
|
|
|
|
// If we are in a TypeNs for a Trait, and we have an unresolved name, try to resolve it as a type
|
|
// within the trait's associated types.
|
|
if let (Some(unresolved), &TypeNs::TraitId(trait_id)) = (&unresolved, &ty) {
|
|
if let Some(type_alias_id) =
|
|
db.trait_data(trait_id).associated_type_by_name(unresolved.name)
|
|
{
|
|
return Some(PathResolution::Def(ModuleDefId::from(type_alias_id).into()));
|
|
}
|
|
}
|
|
|
|
let res = match ty {
|
|
TypeNs::SelfType(it) => PathResolution::SelfType(it.into()),
|
|
TypeNs::GenericParam(id) => PathResolution::TypeParam(id.into()),
|
|
TypeNs::AdtSelfType(it) | TypeNs::AdtId(it) => {
|
|
PathResolution::Def(Adt::from(it).into())
|
|
}
|
|
TypeNs::EnumVariantId(it) => PathResolution::Def(Variant::from(it).into()),
|
|
TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()),
|
|
TypeNs::BuiltinType(it) => PathResolution::Def(BuiltinType::from(it).into()),
|
|
TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()),
|
|
TypeNs::TraitAliasId(it) => PathResolution::Def(TraitAlias::from(it).into()),
|
|
};
|
|
match unresolved {
|
|
Some(unresolved) => resolver
|
|
.generic_def()
|
|
.and_then(|def| {
|
|
hir_ty::associated_type_shorthand_candidates(
|
|
db,
|
|
def,
|
|
res.in_type_ns()?,
|
|
|name, id| (name == unresolved.name).then_some(id),
|
|
)
|
|
})
|
|
.map(TypeAlias::from)
|
|
.map(Into::into)
|
|
.map(PathResolution::Def),
|
|
None => Some(res),
|
|
}
|
|
};
|
|
|
|
let body_owner = resolver.body_owner();
|
|
let values = || resolve_hir_value_path(db, resolver, body_owner, path);
|
|
|
|
let items = || {
|
|
resolver
|
|
.resolve_module_path_in_items(db.upcast(), path.mod_path()?)
|
|
.take_types()
|
|
.map(|it| PathResolution::Def(it.into()))
|
|
};
|
|
|
|
let macros = || {
|
|
resolver
|
|
.resolve_path_as_macro(db.upcast(), path.mod_path()?, None)
|
|
.map(|(def, _)| PathResolution::Def(ModuleDef::Macro(def.into())))
|
|
};
|
|
|
|
if prefer_value_ns { values().or_else(types) } else { types().or_else(values) }
|
|
.or_else(items)
|
|
.or_else(macros)
|
|
}
|
|
|
|
fn resolve_hir_value_path(
|
|
db: &dyn HirDatabase,
|
|
resolver: &Resolver,
|
|
body_owner: Option<DefWithBodyId>,
|
|
path: &Path,
|
|
) -> Option<PathResolution> {
|
|
resolver.resolve_path_in_value_ns_fully(db.upcast(), path).and_then(|val| {
|
|
let res = match val {
|
|
ValueNs::LocalBinding(binding_id) => {
|
|
let var = Local { parent: body_owner?, binding_id };
|
|
PathResolution::Local(var)
|
|
}
|
|
ValueNs::FunctionId(it) => PathResolution::Def(Function::from(it).into()),
|
|
ValueNs::ConstId(it) => PathResolution::Def(Const::from(it).into()),
|
|
ValueNs::StaticId(it) => PathResolution::Def(Static::from(it).into()),
|
|
ValueNs::StructId(it) => PathResolution::Def(Struct::from(it).into()),
|
|
ValueNs::EnumVariantId(it) => PathResolution::Def(Variant::from(it).into()),
|
|
ValueNs::ImplSelf(impl_id) => PathResolution::SelfType(impl_id.into()),
|
|
ValueNs::GenericParam(id) => PathResolution::ConstParam(id.into()),
|
|
};
|
|
Some(res)
|
|
})
|
|
}
|
|
|
|
/// Resolves a path where we know it is a qualifier of another path.
|
|
///
|
|
/// For example, if we have:
|
|
/// ```
|
|
/// mod my {
|
|
/// pub mod foo {
|
|
/// struct Bar;
|
|
/// }
|
|
///
|
|
/// pub fn foo() {}
|
|
/// }
|
|
/// ```
|
|
/// then we know that `foo` in `my::foo::Bar` refers to the module, not the function.
|
|
fn resolve_hir_path_qualifier(
|
|
db: &dyn HirDatabase,
|
|
resolver: &Resolver,
|
|
path: &Path,
|
|
) -> Option<PathResolution> {
|
|
(|| {
|
|
let (ty, unresolved) = match path.type_anchor() {
|
|
Some(type_ref) => {
|
|
let (_, res) =
|
|
TyLoweringContext::new_maybe_unowned(db, resolver, resolver.type_owner())
|
|
.lower_ty_ext(type_ref);
|
|
res.map(|ty_ns| (ty_ns, path.segments().first()))
|
|
}
|
|
None => {
|
|
let (ty, remaining_idx, _) = resolver.resolve_path_in_type_ns(db.upcast(), path)?;
|
|
match remaining_idx {
|
|
Some(remaining_idx) => {
|
|
if remaining_idx + 1 == path.segments().len() {
|
|
Some((ty, path.segments().last()))
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
None => Some((ty, None)),
|
|
}
|
|
}
|
|
}?;
|
|
|
|
// If we are in a TypeNs for a Trait, and we have an unresolved name, try to resolve it as a type
|
|
// within the trait's associated types.
|
|
if let (Some(unresolved), &TypeNs::TraitId(trait_id)) = (&unresolved, &ty) {
|
|
if let Some(type_alias_id) =
|
|
db.trait_data(trait_id).associated_type_by_name(unresolved.name)
|
|
{
|
|
return Some(PathResolution::Def(ModuleDefId::from(type_alias_id).into()));
|
|
}
|
|
}
|
|
|
|
let res = match ty {
|
|
TypeNs::SelfType(it) => PathResolution::SelfType(it.into()),
|
|
TypeNs::GenericParam(id) => PathResolution::TypeParam(id.into()),
|
|
TypeNs::AdtSelfType(it) | TypeNs::AdtId(it) => {
|
|
PathResolution::Def(Adt::from(it).into())
|
|
}
|
|
TypeNs::EnumVariantId(it) => PathResolution::Def(Variant::from(it).into()),
|
|
TypeNs::TypeAliasId(it) => PathResolution::Def(TypeAlias::from(it).into()),
|
|
TypeNs::BuiltinType(it) => PathResolution::Def(BuiltinType::from(it).into()),
|
|
TypeNs::TraitId(it) => PathResolution::Def(Trait::from(it).into()),
|
|
TypeNs::TraitAliasId(it) => PathResolution::Def(TraitAlias::from(it).into()),
|
|
};
|
|
match unresolved {
|
|
Some(unresolved) => resolver
|
|
.generic_def()
|
|
.and_then(|def| {
|
|
hir_ty::associated_type_shorthand_candidates(
|
|
db,
|
|
def,
|
|
res.in_type_ns()?,
|
|
|name, id| (name == unresolved.name).then_some(id),
|
|
)
|
|
})
|
|
.map(TypeAlias::from)
|
|
.map(Into::into)
|
|
.map(PathResolution::Def),
|
|
None => Some(res),
|
|
}
|
|
})()
|
|
.or_else(|| {
|
|
resolver
|
|
.resolve_module_path_in_items(db.upcast(), path.mod_path()?)
|
|
.take_types()
|
|
.map(|it| PathResolution::Def(it.into()))
|
|
})
|
|
}
|