1686 lines
67 KiB
Rust
1686 lines
67 KiB
Rust
//! See `Semantics`.
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mod source_to_def;
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use std::{
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cell::RefCell,
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fmt, iter, mem,
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ops::{self, ControlFlow, Not},
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};
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use base_db::{FileId, FileRange};
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use either::Either;
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use hir_def::{
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hir::Expr,
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lower::LowerCtx,
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nameres::MacroSubNs,
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resolver::{self, HasResolver, Resolver, TypeNs},
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type_ref::Mutability,
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AsMacroCall, DefWithBodyId, FunctionId, MacroId, TraitId, VariantId,
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};
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use hir_expand::{
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attrs::collect_attrs, db::ExpandDatabase, files::InRealFile, name::AsName, ExpansionInfo,
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InMacroFile, MacroCallId, MacroFileId, MacroFileIdExt,
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};
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use itertools::Itertools;
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use rustc_hash::{FxHashMap, FxHashSet};
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use smallvec::{smallvec, SmallVec};
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use span::{Span, SyntaxContextId, ROOT_ERASED_FILE_AST_ID};
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use stdx::TupleExt;
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use syntax::{
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algo::skip_trivia_token,
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ast::{self, HasAttrs as _, HasGenericParams, HasLoopBody, IsString as _},
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match_ast, AstNode, AstToken, Direction, SyntaxKind, SyntaxNode, SyntaxNodePtr, SyntaxToken,
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TextRange, TextSize,
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};
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use crate::{
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db::HirDatabase,
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semantics::source_to_def::{ChildContainer, SourceToDefCache, SourceToDefCtx},
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source_analyzer::{resolve_hir_path, SourceAnalyzer},
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Access, Adjust, Adjustment, AutoBorrow, BindingMode, BuiltinAttr, Callable, ConstParam, Crate,
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DeriveHelper, Field, Function, HasSource, HirFileId, Impl, InFile, Label, LifetimeParam, Local,
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Macro, Module, ModuleDef, Name, OverloadedDeref, Path, ScopeDef, Struct, ToolModule, Trait,
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TupleField, Type, TypeAlias, TypeParam, VariantDef,
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};
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pub enum DescendPreference {
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SameText,
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SameKind,
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None,
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}
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#[derive(Debug, Copy, Clone, PartialEq, Eq)]
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pub enum PathResolution {
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/// An item
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Def(ModuleDef),
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/// A local binding (only value namespace)
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Local(Local),
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/// A type parameter
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TypeParam(TypeParam),
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/// A const parameter
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ConstParam(ConstParam),
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SelfType(Impl),
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BuiltinAttr(BuiltinAttr),
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ToolModule(ToolModule),
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DeriveHelper(DeriveHelper),
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}
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impl PathResolution {
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pub(crate) fn in_type_ns(&self) -> Option<TypeNs> {
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match self {
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PathResolution::Def(ModuleDef::Adt(adt)) => Some(TypeNs::AdtId((*adt).into())),
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PathResolution::Def(ModuleDef::BuiltinType(builtin)) => {
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Some(TypeNs::BuiltinType((*builtin).into()))
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}
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PathResolution::Def(
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ModuleDef::Const(_)
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| ModuleDef::Variant(_)
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| ModuleDef::Macro(_)
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| ModuleDef::Function(_)
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| ModuleDef::Module(_)
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| ModuleDef::Static(_)
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| ModuleDef::Trait(_)
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| ModuleDef::TraitAlias(_),
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) => None,
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PathResolution::Def(ModuleDef::TypeAlias(alias)) => {
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Some(TypeNs::TypeAliasId((*alias).into()))
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}
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PathResolution::BuiltinAttr(_)
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| PathResolution::ToolModule(_)
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| PathResolution::Local(_)
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| PathResolution::DeriveHelper(_)
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| PathResolution::ConstParam(_) => None,
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PathResolution::TypeParam(param) => Some(TypeNs::GenericParam((*param).into())),
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PathResolution::SelfType(impl_def) => Some(TypeNs::SelfType((*impl_def).into())),
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}
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}
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}
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#[derive(Debug)]
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pub struct TypeInfo {
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/// The original type of the expression or pattern.
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pub original: Type,
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/// The adjusted type, if an adjustment happened.
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pub adjusted: Option<Type>,
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}
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impl TypeInfo {
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pub fn original(self) -> Type {
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self.original
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}
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pub fn has_adjustment(&self) -> bool {
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self.adjusted.is_some()
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}
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/// The adjusted type, or the original in case no adjustments occurred.
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pub fn adjusted(self) -> Type {
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self.adjusted.unwrap_or(self.original)
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}
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}
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/// Primary API to get semantic information, like types, from syntax trees.
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pub struct Semantics<'db, DB> {
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pub db: &'db DB,
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imp: SemanticsImpl<'db>,
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}
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pub struct SemanticsImpl<'db> {
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pub db: &'db dyn HirDatabase,
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s2d_cache: RefCell<SourceToDefCache>,
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/// Rootnode to HirFileId cache
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cache: RefCell<FxHashMap<SyntaxNode, HirFileId>>,
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// These 2 caches are mainly useful for semantic highlighting as nothing else descends a lot of tokens
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// So we might wanna move them out into something specific for semantic highlighting
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expansion_info_cache: RefCell<FxHashMap<MacroFileId, ExpansionInfo>>,
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/// MacroCall to its expansion's MacroFileId cache
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macro_call_cache: RefCell<FxHashMap<InFile<ast::MacroCall>, MacroFileId>>,
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}
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impl<DB> fmt::Debug for Semantics<'_, DB> {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(f, "Semantics {{ ... }}")
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}
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}
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impl<'db, DB> ops::Deref for Semantics<'db, DB> {
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type Target = SemanticsImpl<'db>;
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fn deref(&self) -> &Self::Target {
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&self.imp
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}
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}
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impl<'db, DB: HirDatabase> Semantics<'db, DB> {
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pub fn new(db: &DB) -> Semantics<'_, DB> {
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let impl_ = SemanticsImpl::new(db);
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Semantics { db, imp: impl_ }
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}
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pub fn hir_file_for(&self, syntax_node: &SyntaxNode) -> HirFileId {
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self.imp.find_file(syntax_node).file_id
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}
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pub fn token_ancestors_with_macros(
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&self,
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token: SyntaxToken,
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) -> impl Iterator<Item = SyntaxNode> + '_ {
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token.parent().into_iter().flat_map(move |it| self.ancestors_with_macros(it))
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}
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/// Find an AstNode by offset inside SyntaxNode, if it is inside *Macrofile*,
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/// search up until it is of the target AstNode type
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pub fn find_node_at_offset_with_macros<N: AstNode>(
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&self,
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node: &SyntaxNode,
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offset: TextSize,
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) -> Option<N> {
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self.imp.ancestors_at_offset_with_macros(node, offset).find_map(N::cast)
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}
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/// Find an AstNode by offset inside SyntaxNode, if it is inside *MacroCall*,
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/// descend it and find again
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pub fn find_node_at_offset_with_descend<N: AstNode>(
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&self,
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node: &SyntaxNode,
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offset: TextSize,
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) -> Option<N> {
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self.imp.descend_node_at_offset(node, offset).flatten().find_map(N::cast)
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}
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/// Find an AstNode by offset inside SyntaxNode, if it is inside *MacroCall*,
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/// descend it and find again
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pub fn find_nodes_at_offset_with_descend<'slf, N: AstNode + 'slf>(
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&'slf self,
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node: &SyntaxNode,
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offset: TextSize,
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) -> impl Iterator<Item = N> + 'slf {
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self.imp.descend_node_at_offset(node, offset).filter_map(|mut it| it.find_map(N::cast))
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}
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pub fn resolve_await_to_poll(&self, await_expr: &ast::AwaitExpr) -> Option<Function> {
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self.imp.resolve_await_to_poll(await_expr).map(Function::from)
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}
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pub fn resolve_prefix_expr(&self, prefix_expr: &ast::PrefixExpr) -> Option<Function> {
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self.imp.resolve_prefix_expr(prefix_expr).map(Function::from)
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}
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pub fn resolve_index_expr(&self, index_expr: &ast::IndexExpr) -> Option<Function> {
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self.imp.resolve_index_expr(index_expr).map(Function::from)
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}
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pub fn resolve_bin_expr(&self, bin_expr: &ast::BinExpr) -> Option<Function> {
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self.imp.resolve_bin_expr(bin_expr).map(Function::from)
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}
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pub fn resolve_try_expr(&self, try_expr: &ast::TryExpr) -> Option<Function> {
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self.imp.resolve_try_expr(try_expr).map(Function::from)
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}
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pub fn resolve_variant(&self, record_lit: ast::RecordExpr) -> Option<VariantDef> {
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self.imp.resolve_variant(record_lit).map(VariantDef::from)
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}
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pub fn to_module_def(&self, file: FileId) -> Option<Module> {
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self.imp.to_module_def(file).next()
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}
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pub fn to_module_defs(&self, file: FileId) -> impl Iterator<Item = Module> {
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self.imp.to_module_def(file)
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}
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pub fn to_struct_def(&self, s: &ast::Struct) -> Option<Struct> {
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self.imp.to_def(s).map(Struct::from)
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}
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pub fn to_impl_def(&self, i: &ast::Impl) -> Option<Impl> {
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self.imp.to_def(i).map(Impl::from)
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}
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}
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impl<'db> SemanticsImpl<'db> {
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fn new(db: &'db dyn HirDatabase) -> Self {
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SemanticsImpl {
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db,
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s2d_cache: Default::default(),
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cache: Default::default(),
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expansion_info_cache: Default::default(),
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macro_call_cache: Default::default(),
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}
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}
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pub fn parse(&self, file_id: FileId) -> ast::SourceFile {
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let tree = self.db.parse(file_id).tree();
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self.cache(tree.syntax().clone(), file_id.into());
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tree
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}
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pub fn parse_or_expand(&self, file_id: HirFileId) -> SyntaxNode {
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let node = self.db.parse_or_expand(file_id);
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self.cache(node.clone(), file_id);
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node
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}
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pub fn expand(&self, macro_call: &ast::MacroCall) -> Option<SyntaxNode> {
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let sa = self.analyze_no_infer(macro_call.syntax())?;
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let file_id = sa.expand(self.db, InFile::new(sa.file_id, macro_call))?;
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let node = self.parse_or_expand(file_id.into());
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Some(node)
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}
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/// If `item` has an attribute macro attached to it, expands it.
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pub fn expand_attr_macro(&self, item: &ast::Item) -> Option<SyntaxNode> {
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let src = self.wrap_node_infile(item.clone());
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let macro_call_id = self.with_ctx(|ctx| ctx.item_to_macro_call(src))?;
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Some(self.parse_or_expand(macro_call_id.as_file()))
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}
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pub fn expand_derive_as_pseudo_attr_macro(&self, attr: &ast::Attr) -> Option<SyntaxNode> {
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let adt = attr.syntax().parent().and_then(ast::Adt::cast)?;
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let src = self.wrap_node_infile(attr.clone());
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let call_id = self.with_ctx(|ctx| {
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ctx.attr_to_derive_macro_call(src.with_value(&adt), src).map(|(_, it, _)| it)
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})?;
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Some(self.parse_or_expand(call_id.as_file()))
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}
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pub fn resolve_derive_macro(&self, attr: &ast::Attr) -> Option<Vec<Option<Macro>>> {
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let calls = self.derive_macro_calls(attr)?;
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self.with_ctx(|ctx| {
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Some(
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calls
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.into_iter()
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.map(|call| {
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macro_call_to_macro_id(ctx, self.db.upcast(), call?).map(|id| Macro { id })
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})
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.collect(),
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)
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})
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}
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pub fn expand_derive_macro(&self, attr: &ast::Attr) -> Option<Vec<SyntaxNode>> {
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let res: Vec<_> = self
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.derive_macro_calls(attr)?
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.into_iter()
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.flat_map(|call| {
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let file_id = call?.as_file();
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let node = self.db.parse_or_expand(file_id);
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self.cache(node.clone(), file_id);
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Some(node)
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})
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.collect();
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Some(res)
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}
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fn derive_macro_calls(&self, attr: &ast::Attr) -> Option<Vec<Option<MacroCallId>>> {
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let adt = attr.syntax().parent().and_then(ast::Adt::cast)?;
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let file_id = self.find_file(adt.syntax()).file_id;
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let adt = InFile::new(file_id, &adt);
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let src = InFile::new(file_id, attr.clone());
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self.with_ctx(|ctx| {
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let (.., res) = ctx.attr_to_derive_macro_call(adt, src)?;
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Some(res.to_vec())
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})
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}
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pub fn is_derive_annotated(&self, adt: &ast::Adt) -> bool {
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let file_id = self.find_file(adt.syntax()).file_id;
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let adt = InFile::new(file_id, adt);
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self.with_ctx(|ctx| ctx.has_derives(adt))
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}
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pub fn is_attr_macro_call(&self, item: &ast::Item) -> bool {
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let file_id = self.find_file(item.syntax()).file_id;
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let src = InFile::new(file_id, item.clone());
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self.with_ctx(|ctx| ctx.item_to_macro_call(src).is_some())
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}
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/// Expand the macro call with a different token tree, mapping the `token_to_map` down into the
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/// expansion. `token_to_map` should be a token from the `speculative args` node.
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pub fn speculative_expand(
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&self,
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actual_macro_call: &ast::MacroCall,
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speculative_args: &ast::TokenTree,
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token_to_map: SyntaxToken,
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) -> Option<(SyntaxNode, SyntaxToken)> {
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let SourceAnalyzer { file_id, resolver, .. } =
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self.analyze_no_infer(actual_macro_call.syntax())?;
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let macro_call = InFile::new(file_id, actual_macro_call);
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let krate = resolver.krate();
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let macro_call_id = macro_call.as_call_id(self.db.upcast(), krate, |path| {
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resolver.resolve_path_as_macro_def(self.db.upcast(), &path, Some(MacroSubNs::Bang))
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})?;
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hir_expand::db::expand_speculative(
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self.db.upcast(),
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macro_call_id,
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speculative_args.syntax(),
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token_to_map,
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)
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}
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/// Expand the macro call with a different item as the input, mapping the `token_to_map` down into the
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/// expansion. `token_to_map` should be a token from the `speculative args` node.
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pub fn speculative_expand_attr_macro(
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&self,
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actual_macro_call: &ast::Item,
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speculative_args: &ast::Item,
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token_to_map: SyntaxToken,
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) -> Option<(SyntaxNode, SyntaxToken)> {
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let macro_call = self.wrap_node_infile(actual_macro_call.clone());
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let macro_call_id = self.with_ctx(|ctx| ctx.item_to_macro_call(macro_call))?;
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hir_expand::db::expand_speculative(
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self.db.upcast(),
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macro_call_id,
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speculative_args.syntax(),
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token_to_map,
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)
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}
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pub fn speculative_expand_derive_as_pseudo_attr_macro(
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&self,
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actual_macro_call: &ast::Attr,
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speculative_args: &ast::Attr,
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token_to_map: SyntaxToken,
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) -> Option<(SyntaxNode, SyntaxToken)> {
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let attr = self.wrap_node_infile(actual_macro_call.clone());
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let adt = actual_macro_call.syntax().parent().and_then(ast::Adt::cast)?;
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let macro_call_id = self.with_ctx(|ctx| {
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ctx.attr_to_derive_macro_call(attr.with_value(&adt), attr).map(|(_, it, _)| it)
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})?;
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hir_expand::db::expand_speculative(
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self.db.upcast(),
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macro_call_id,
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speculative_args.syntax(),
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token_to_map,
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)
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}
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pub fn as_format_args_parts(
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&self,
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string: &ast::String,
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) -> Option<Vec<(TextRange, Option<PathResolution>)>> {
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if let Some(quote) = string.open_quote_text_range() {
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return self
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.descend_into_macros(DescendPreference::SameText, string.syntax().clone())
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.into_iter()
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.find_map(|token| {
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let string = ast::String::cast(token)?;
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let literal =
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string.syntax().parent().filter(|it| it.kind() == SyntaxKind::LITERAL)?;
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let format_args = ast::FormatArgsExpr::cast(literal.parent()?)?;
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let source_analyzer = self.analyze_no_infer(format_args.syntax())?;
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let format_args = self.wrap_node_infile(format_args);
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let res = source_analyzer
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.as_format_args_parts(self.db, format_args.as_ref())?
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.map(|(range, res)| (range + quote.end(), res))
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.collect();
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Some(res)
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});
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}
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None
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}
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|
|
pub fn check_for_format_args_template(
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&self,
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original_token: SyntaxToken,
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offset: TextSize,
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) -> Option<(TextRange, Option<PathResolution>)> {
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if let Some(original_string) = ast::String::cast(original_token.clone()) {
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if let Some(quote) = original_string.open_quote_text_range() {
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return self
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.descend_into_macros(DescendPreference::SameText, original_token)
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.into_iter()
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.find_map(|token| {
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self.resolve_offset_in_format_args(
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ast::String::cast(token)?,
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offset.checked_sub(quote.end())?,
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)
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})
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.map(|(range, res)| (range + quote.end(), res));
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}
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}
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None
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}
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|
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fn resolve_offset_in_format_args(
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&self,
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string: ast::String,
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offset: TextSize,
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) -> Option<(TextRange, Option<PathResolution>)> {
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debug_assert!(offset <= string.syntax().text_range().len());
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let literal = string.syntax().parent().filter(|it| it.kind() == SyntaxKind::LITERAL)?;
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let format_args = ast::FormatArgsExpr::cast(literal.parent()?)?;
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let source_analyzer = &self.analyze_no_infer(format_args.syntax())?;
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let format_args = self.wrap_node_infile(format_args);
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source_analyzer.resolve_offset_in_format_args(self.db, format_args.as_ref(), offset)
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}
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|
|
/// Maps a node down by mapping its first and last token down.
|
|
pub fn descend_node_into_attributes<N: AstNode>(&self, node: N) -> SmallVec<[N; 1]> {
|
|
// This might not be the correct way to do this, but it works for now
|
|
let mut res = smallvec![];
|
|
let tokens = (|| {
|
|
// FIXME: the trivia skipping should not be necessary
|
|
let first = skip_trivia_token(node.syntax().first_token()?, Direction::Next)?;
|
|
let last = skip_trivia_token(node.syntax().last_token()?, Direction::Prev)?;
|
|
Some((first, last))
|
|
})();
|
|
let (first, last) = match tokens {
|
|
Some(it) => it,
|
|
None => return res,
|
|
};
|
|
|
|
if first == last {
|
|
// node is just the token, so descend the token
|
|
self.descend_into_macros_impl(first, &mut |InFile { value, .. }| {
|
|
if let Some(node) = value
|
|
.parent_ancestors()
|
|
.take_while(|it| it.text_range() == value.text_range())
|
|
.find_map(N::cast)
|
|
{
|
|
res.push(node)
|
|
}
|
|
ControlFlow::Continue(())
|
|
});
|
|
} else {
|
|
// Descend first and last token, then zip them to look for the node they belong to
|
|
let mut scratch: SmallVec<[_; 1]> = smallvec![];
|
|
self.descend_into_macros_impl(first, &mut |token| {
|
|
scratch.push(token);
|
|
ControlFlow::Continue(())
|
|
});
|
|
|
|
let mut scratch = scratch.into_iter();
|
|
self.descend_into_macros_impl(
|
|
last,
|
|
&mut |InFile { value: last, file_id: last_fid }| {
|
|
if let Some(InFile { value: first, file_id: first_fid }) = scratch.next() {
|
|
if first_fid == last_fid {
|
|
if let Some(p) = first.parent() {
|
|
let range = first.text_range().cover(last.text_range());
|
|
let node = find_root(&p)
|
|
.covering_element(range)
|
|
.ancestors()
|
|
.take_while(|it| it.text_range() == range)
|
|
.find_map(N::cast);
|
|
if let Some(node) = node {
|
|
res.push(node);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ControlFlow::Continue(())
|
|
},
|
|
);
|
|
}
|
|
res
|
|
}
|
|
|
|
/// Descend the token into its macro call if it is part of one, returning the tokens in the
|
|
/// expansion that it is associated with.
|
|
pub fn descend_into_macros(
|
|
&self,
|
|
mode: DescendPreference,
|
|
token: SyntaxToken,
|
|
) -> SmallVec<[SyntaxToken; 1]> {
|
|
enum Dp<'t> {
|
|
SameText(&'t str),
|
|
SameKind(SyntaxKind),
|
|
None,
|
|
}
|
|
let fetch_kind = |token: &SyntaxToken| match token.parent() {
|
|
Some(node) => match node.kind() {
|
|
kind @ (SyntaxKind::NAME | SyntaxKind::NAME_REF) => kind,
|
|
_ => token.kind(),
|
|
},
|
|
None => token.kind(),
|
|
};
|
|
let mode = match mode {
|
|
DescendPreference::SameText => Dp::SameText(token.text()),
|
|
DescendPreference::SameKind => Dp::SameKind(fetch_kind(&token)),
|
|
DescendPreference::None => Dp::None,
|
|
};
|
|
let mut res = smallvec![];
|
|
self.descend_into_macros_impl(token.clone(), &mut |InFile { value, .. }| {
|
|
let is_a_match = match mode {
|
|
Dp::SameText(text) => value.text() == text,
|
|
Dp::SameKind(preferred_kind) => {
|
|
let kind = fetch_kind(&value);
|
|
kind == preferred_kind
|
|
// special case for derive macros
|
|
|| (preferred_kind == SyntaxKind::IDENT && kind == SyntaxKind::NAME_REF)
|
|
}
|
|
Dp::None => true,
|
|
};
|
|
if is_a_match {
|
|
res.push(value);
|
|
}
|
|
ControlFlow::Continue(())
|
|
});
|
|
if res.is_empty() {
|
|
res.push(token);
|
|
}
|
|
res
|
|
}
|
|
|
|
pub fn descend_into_macros_single(
|
|
&self,
|
|
mode: DescendPreference,
|
|
token: SyntaxToken,
|
|
) -> SyntaxToken {
|
|
enum Dp<'t> {
|
|
SameText(&'t str),
|
|
SameKind(SyntaxKind),
|
|
None,
|
|
}
|
|
let fetch_kind = |token: &SyntaxToken| match token.parent() {
|
|
Some(node) => match node.kind() {
|
|
kind @ (SyntaxKind::NAME | SyntaxKind::NAME_REF) => kind,
|
|
_ => token.kind(),
|
|
},
|
|
None => token.kind(),
|
|
};
|
|
let mode = match mode {
|
|
DescendPreference::SameText => Dp::SameText(token.text()),
|
|
DescendPreference::SameKind => Dp::SameKind(fetch_kind(&token)),
|
|
DescendPreference::None => Dp::None,
|
|
};
|
|
let mut res = token.clone();
|
|
self.descend_into_macros_impl(token.clone(), &mut |InFile { value, .. }| {
|
|
let is_a_match = match mode {
|
|
Dp::SameText(text) => value.text() == text,
|
|
Dp::SameKind(preferred_kind) => {
|
|
let kind = fetch_kind(&value);
|
|
kind == preferred_kind
|
|
// special case for derive macros
|
|
|| (preferred_kind == SyntaxKind::IDENT && kind == SyntaxKind::NAME_REF)
|
|
}
|
|
Dp::None => true,
|
|
};
|
|
res = value;
|
|
if is_a_match {
|
|
ControlFlow::Break(())
|
|
} else {
|
|
ControlFlow::Continue(())
|
|
}
|
|
});
|
|
res
|
|
}
|
|
|
|
// return:
|
|
// SourceAnalyzer(file_id that original call include!)
|
|
// macro file id
|
|
// token in include! macro mapped from token in params
|
|
// span for the mapped token
|
|
fn is_from_include_file(
|
|
&self,
|
|
token: SyntaxToken,
|
|
) -> Option<(SourceAnalyzer, HirFileId, SyntaxToken, Span)> {
|
|
let parent = token.parent()?;
|
|
let file_id = self.find_file(&parent).file_id.file_id()?;
|
|
|
|
let mut cache = self.expansion_info_cache.borrow_mut();
|
|
|
|
// iterate related crates and find all include! invocations that include_file_id matches
|
|
for (invoc, _) in self
|
|
.db
|
|
.relevant_crates(file_id)
|
|
.iter()
|
|
.flat_map(|krate| self.db.include_macro_invoc(*krate))
|
|
.filter(|&(_, include_file_id)| include_file_id == file_id)
|
|
{
|
|
let macro_file = invoc.as_macro_file();
|
|
let expansion_info = cache
|
|
.entry(macro_file)
|
|
.or_insert_with(|| macro_file.expansion_info(self.db.upcast()));
|
|
|
|
// Create the source analyzer for the macro call scope
|
|
let Some(sa) = self.analyze_no_infer(&self.parse_or_expand(expansion_info.call_file()))
|
|
else {
|
|
continue;
|
|
};
|
|
{
|
|
let InMacroFile { file_id: macro_file, value } = expansion_info.expanded();
|
|
self.cache(value, macro_file.into());
|
|
}
|
|
|
|
// get mapped token in the include! macro file
|
|
let span = span::SpanData {
|
|
range: token.text_range(),
|
|
anchor: span::SpanAnchor { file_id, ast_id: ROOT_ERASED_FILE_AST_ID },
|
|
ctx: SyntaxContextId::ROOT,
|
|
};
|
|
let Some(InMacroFile { file_id, value: mut mapped_tokens }) =
|
|
expansion_info.map_range_down(span)
|
|
else {
|
|
continue;
|
|
};
|
|
|
|
// if we find one, then return
|
|
if let Some(t) = mapped_tokens.next() {
|
|
return Some((sa, file_id.into(), t, span));
|
|
}
|
|
}
|
|
|
|
None
|
|
}
|
|
|
|
fn descend_into_macros_impl(
|
|
&self,
|
|
mut token: SyntaxToken,
|
|
f: &mut dyn FnMut(InFile<SyntaxToken>) -> ControlFlow<()>,
|
|
) {
|
|
let _p = tracing::span!(tracing::Level::INFO, "descend_into_macros");
|
|
let (sa, span, file_id) =
|
|
match token.parent().and_then(|parent| self.analyze_no_infer(&parent)) {
|
|
Some(sa) => match sa.file_id.file_id() {
|
|
Some(file_id) => (
|
|
sa,
|
|
self.db.real_span_map(file_id).span_for_range(token.text_range()),
|
|
file_id.into(),
|
|
),
|
|
None => {
|
|
stdx::never!();
|
|
return;
|
|
}
|
|
},
|
|
None => {
|
|
// if we cannot find a source analyzer for this token, then we try to find out
|
|
// whether this file is an included file and treat that as the include input
|
|
let Some((it, macro_file_id, mapped_token, s)) =
|
|
self.is_from_include_file(token)
|
|
else {
|
|
return;
|
|
};
|
|
token = mapped_token;
|
|
(it, s, macro_file_id)
|
|
}
|
|
};
|
|
|
|
let mut cache = self.expansion_info_cache.borrow_mut();
|
|
let mut mcache = self.macro_call_cache.borrow_mut();
|
|
let def_map = sa.resolver.def_map();
|
|
|
|
let mut stack: Vec<(_, SmallVec<[_; 2]>)> = vec![(file_id, smallvec![token])];
|
|
|
|
let mut process_expansion_for_token = |stack: &mut Vec<_>, macro_file| {
|
|
let expansion_info = cache
|
|
.entry(macro_file)
|
|
.or_insert_with(|| macro_file.expansion_info(self.db.upcast()));
|
|
|
|
{
|
|
let InMacroFile { file_id, value } = expansion_info.expanded();
|
|
self.cache(value, file_id.into());
|
|
}
|
|
|
|
let InMacroFile { file_id, value: mapped_tokens } =
|
|
expansion_info.map_range_down(span)?;
|
|
let mapped_tokens: SmallVec<[_; 2]> = mapped_tokens.collect();
|
|
|
|
// if the length changed we have found a mapping for the token
|
|
let res = mapped_tokens.is_empty().not().then_some(());
|
|
// requeue the tokens we got from mapping our current token down
|
|
stack.push((HirFileId::from(file_id), mapped_tokens));
|
|
res
|
|
};
|
|
|
|
while let Some((file_id, mut tokens)) = stack.pop() {
|
|
while let Some(token) = tokens.pop() {
|
|
let was_not_remapped = (|| {
|
|
// First expand into attribute invocations
|
|
let containing_attribute_macro_call = self.with_ctx(|ctx| {
|
|
token.parent_ancestors().filter_map(ast::Item::cast).find_map(|item| {
|
|
// Don't force populate the dyn cache for items that don't have an attribute anyways
|
|
item.attrs().next()?;
|
|
Some((
|
|
ctx.item_to_macro_call(InFile::new(file_id, item.clone()))?,
|
|
item,
|
|
))
|
|
})
|
|
});
|
|
if let Some((call_id, item)) = containing_attribute_macro_call {
|
|
let file_id = call_id.as_macro_file();
|
|
let attr_id = match self.db.lookup_intern_macro_call(call_id).kind {
|
|
hir_expand::MacroCallKind::Attr { invoc_attr_index, .. } => {
|
|
invoc_attr_index.ast_index()
|
|
}
|
|
_ => 0,
|
|
};
|
|
// FIXME: here, the attribute's text range is used to strip away all
|
|
// entries from the start of the attribute "list" up the invoking
|
|
// attribute. But in
|
|
// ```
|
|
// mod foo {
|
|
// #![inner]
|
|
// }
|
|
// ```
|
|
// we don't wanna strip away stuff in the `mod foo {` range, that is
|
|
// here if the id corresponds to an inner attribute we got strip all
|
|
// text ranges of the outer ones, and then all of the inner ones up
|
|
// to the invoking attribute so that the inbetween is ignored.
|
|
let text_range = item.syntax().text_range();
|
|
let start = collect_attrs(&item)
|
|
.nth(attr_id)
|
|
.map(|attr| match attr.1 {
|
|
Either::Left(it) => it.syntax().text_range().start(),
|
|
Either::Right(it) => it.syntax().text_range().start(),
|
|
})
|
|
.unwrap_or_else(|| text_range.start());
|
|
let text_range = TextRange::new(start, text_range.end());
|
|
// remove any other token in this macro input, all their mappings are the
|
|
// same as this one
|
|
tokens.retain(|t| !text_range.contains_range(t.text_range()));
|
|
return process_expansion_for_token(&mut stack, file_id);
|
|
}
|
|
|
|
// Then check for token trees, that means we are either in a function-like macro or
|
|
// secondary attribute inputs
|
|
let tt = token.parent_ancestors().map_while(ast::TokenTree::cast).last()?;
|
|
let parent = tt.syntax().parent()?;
|
|
|
|
if tt.left_delimiter_token().map_or(false, |it| it == token) {
|
|
return None;
|
|
}
|
|
if tt.right_delimiter_token().map_or(false, |it| it == token) {
|
|
return None;
|
|
}
|
|
|
|
if let Some(macro_call) = ast::MacroCall::cast(parent.clone()) {
|
|
let mcall: hir_expand::files::InFileWrapper<HirFileId, ast::MacroCall> =
|
|
InFile::new(file_id, macro_call);
|
|
let file_id = match mcache.get(&mcall) {
|
|
Some(&it) => it,
|
|
None => {
|
|
let it = sa.expand(self.db, mcall.as_ref())?;
|
|
mcache.insert(mcall, it);
|
|
it
|
|
}
|
|
};
|
|
let text_range = tt.syntax().text_range();
|
|
// remove any other token in this macro input, all their mappings are the
|
|
// same as this one
|
|
tokens.retain(|t| !text_range.contains_range(t.text_range()));
|
|
process_expansion_for_token(&mut stack, file_id)
|
|
} else if let Some(meta) = ast::Meta::cast(parent) {
|
|
// attribute we failed expansion for earlier, this might be a derive invocation
|
|
// or derive helper attribute
|
|
let attr = meta.parent_attr()?;
|
|
|
|
let adt = if let Some(adt) = attr.syntax().parent().and_then(ast::Adt::cast)
|
|
{
|
|
// this might be a derive, or a derive helper on an ADT
|
|
let derive_call = self.with_ctx(|ctx| {
|
|
// so try downmapping the token into the pseudo derive expansion
|
|
// see [hir_expand::builtin_attr_macro] for how the pseudo derive expansion works
|
|
ctx.attr_to_derive_macro_call(
|
|
InFile::new(file_id, &adt),
|
|
InFile::new(file_id, attr.clone()),
|
|
)
|
|
.map(|(_, call_id, _)| call_id)
|
|
});
|
|
|
|
match derive_call {
|
|
Some(call_id) => {
|
|
// resolved to a derive
|
|
let file_id = call_id.as_macro_file();
|
|
let text_range = attr.syntax().text_range();
|
|
// remove any other token in this macro input, all their mappings are the
|
|
// same as this one
|
|
tokens.retain(|t| !text_range.contains_range(t.text_range()));
|
|
return process_expansion_for_token(&mut stack, file_id);
|
|
}
|
|
None => Some(adt),
|
|
}
|
|
} else {
|
|
// Otherwise this could be a derive helper on a variant or field
|
|
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 !self.with_ctx(|ctx| ctx.has_derives(InFile::new(file_id, &adt))) {
|
|
return None;
|
|
}
|
|
// Not an attribute, nor a derive, so it's either a builtin or a derive helper
|
|
// Try to resolve to a derive helper and downmap
|
|
let attr_name =
|
|
attr.path().and_then(|it| it.as_single_name_ref())?.as_name();
|
|
let id = self.db.ast_id_map(file_id).ast_id(&adt);
|
|
let helpers = def_map.derive_helpers_in_scope(InFile::new(file_id, id))?;
|
|
let mut res = None;
|
|
for (.., derive) in
|
|
helpers.iter().filter(|(helper, ..)| *helper == attr_name)
|
|
{
|
|
res = res.or(process_expansion_for_token(
|
|
&mut stack,
|
|
derive.as_macro_file(),
|
|
));
|
|
}
|
|
res
|
|
} else {
|
|
None
|
|
}
|
|
})()
|
|
.is_none();
|
|
|
|
if was_not_remapped && f(InFile::new(file_id, token)).is_break() {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note this return type is deliberate as [`find_nodes_at_offset_with_descend`] wants to stop
|
|
// traversing the inner iterator when it finds a node.
|
|
// The outer iterator is over the tokens descendants
|
|
// The inner iterator is the ancestors of a descendant
|
|
fn descend_node_at_offset(
|
|
&self,
|
|
node: &SyntaxNode,
|
|
offset: TextSize,
|
|
) -> impl Iterator<Item = impl Iterator<Item = SyntaxNode> + '_> + '_ {
|
|
node.token_at_offset(offset)
|
|
.map(move |token| self.descend_into_macros(DescendPreference::None, token))
|
|
.map(|descendants| {
|
|
descendants.into_iter().map(move |it| self.token_ancestors_with_macros(it))
|
|
})
|
|
// re-order the tokens from token_at_offset by returning the ancestors with the smaller first nodes first
|
|
// See algo::ancestors_at_offset, which uses the same approach
|
|
.kmerge_by(|left, right| {
|
|
left.clone()
|
|
.map(|node| node.text_range().len())
|
|
.lt(right.clone().map(|node| node.text_range().len()))
|
|
})
|
|
}
|
|
|
|
/// Attempts to map the node out of macro expanded files returning the original file range.
|
|
/// If upmapping is not possible, this will fall back to the range of the macro call of the
|
|
/// macro file the node resides in.
|
|
pub fn original_range(&self, node: &SyntaxNode) -> FileRange {
|
|
let node = self.find_file(node);
|
|
node.original_file_range(self.db.upcast())
|
|
}
|
|
|
|
/// Attempts to map the node out of macro expanded files returning the original file range.
|
|
pub fn original_range_opt(&self, node: &SyntaxNode) -> Option<FileRange> {
|
|
let node = self.find_file(node);
|
|
node.original_file_range_opt(self.db.upcast())
|
|
.filter(|(_, ctx)| ctx.is_root())
|
|
.map(TupleExt::head)
|
|
}
|
|
|
|
/// Attempts to map the node out of macro expanded files.
|
|
/// This only work for attribute expansions, as other ones do not have nodes as input.
|
|
pub fn original_ast_node<N: AstNode>(&self, node: N) -> Option<N> {
|
|
self.wrap_node_infile(node).original_ast_node_rooted(self.db.upcast()).map(
|
|
|InRealFile { file_id, value }| {
|
|
self.cache(find_root(value.syntax()), file_id.into());
|
|
value
|
|
},
|
|
)
|
|
}
|
|
|
|
/// Attempts to map the node out of macro expanded files.
|
|
/// This only work for attribute expansions, as other ones do not have nodes as input.
|
|
pub fn original_syntax_node(&self, node: &SyntaxNode) -> Option<SyntaxNode> {
|
|
let InFile { file_id, .. } = self.find_file(node);
|
|
InFile::new(file_id, node).original_syntax_node(self.db.upcast()).map(
|
|
|InRealFile { file_id, value }| {
|
|
self.cache(find_root(&value), file_id.into());
|
|
value
|
|
},
|
|
)
|
|
}
|
|
|
|
pub fn diagnostics_display_range(&self, src: InFile<SyntaxNodePtr>) -> FileRange {
|
|
let root = self.parse_or_expand(src.file_id);
|
|
let node = src.map(|it| it.to_node(&root));
|
|
node.as_ref().original_file_range(self.db.upcast())
|
|
}
|
|
|
|
fn token_ancestors_with_macros(
|
|
&self,
|
|
token: SyntaxToken,
|
|
) -> impl Iterator<Item = SyntaxNode> + Clone + '_ {
|
|
token.parent().into_iter().flat_map(move |parent| self.ancestors_with_macros(parent))
|
|
}
|
|
|
|
/// Iterates the ancestors of the given node, climbing up macro expansions while doing so.
|
|
pub fn ancestors_with_macros(
|
|
&self,
|
|
node: SyntaxNode,
|
|
) -> impl Iterator<Item = SyntaxNode> + Clone + '_ {
|
|
let node = self.find_file(&node);
|
|
let db = self.db.upcast();
|
|
iter::successors(Some(node.cloned()), move |&InFile { file_id, ref value }| {
|
|
match value.parent() {
|
|
Some(parent) => Some(InFile::new(file_id, parent)),
|
|
None => {
|
|
self.cache(value.clone(), file_id);
|
|
Some(file_id.macro_file()?.call_node(db))
|
|
}
|
|
}
|
|
})
|
|
.map(|it| it.value)
|
|
}
|
|
|
|
pub fn ancestors_at_offset_with_macros(
|
|
&self,
|
|
node: &SyntaxNode,
|
|
offset: TextSize,
|
|
) -> impl Iterator<Item = SyntaxNode> + '_ {
|
|
node.token_at_offset(offset)
|
|
.map(|token| self.token_ancestors_with_macros(token))
|
|
.kmerge_by(|node1, node2| node1.text_range().len() < node2.text_range().len())
|
|
}
|
|
|
|
pub fn resolve_lifetime_param(&self, lifetime: &ast::Lifetime) -> Option<LifetimeParam> {
|
|
let text = lifetime.text();
|
|
let lifetime_param = lifetime.syntax().ancestors().find_map(|syn| {
|
|
let gpl = ast::AnyHasGenericParams::cast(syn)?.generic_param_list()?;
|
|
gpl.lifetime_params()
|
|
.find(|tp| tp.lifetime().as_ref().map(|lt| lt.text()).as_ref() == Some(&text))
|
|
})?;
|
|
let src = self.wrap_node_infile(lifetime_param);
|
|
ToDef::to_def(self, src)
|
|
}
|
|
|
|
pub fn resolve_label(&self, lifetime: &ast::Lifetime) -> Option<Label> {
|
|
let text = lifetime.text();
|
|
let label = lifetime.syntax().ancestors().find_map(|syn| {
|
|
let label = match_ast! {
|
|
match syn {
|
|
ast::ForExpr(it) => it.label(),
|
|
ast::WhileExpr(it) => it.label(),
|
|
ast::LoopExpr(it) => it.label(),
|
|
ast::BlockExpr(it) => it.label(),
|
|
_ => None,
|
|
}
|
|
};
|
|
label.filter(|l| {
|
|
l.lifetime()
|
|
.and_then(|lt| lt.lifetime_ident_token())
|
|
.map_or(false, |lt| lt.text() == text)
|
|
})
|
|
})?;
|
|
let src = self.wrap_node_infile(label);
|
|
ToDef::to_def(self, src)
|
|
}
|
|
|
|
pub fn resolve_type(&self, ty: &ast::Type) -> Option<Type> {
|
|
let analyze = self.analyze(ty.syntax())?;
|
|
let ctx = LowerCtx::with_file_id(self.db.upcast(), analyze.file_id);
|
|
let ty = hir_ty::TyLoweringContext::new_maybe_unowned(
|
|
self.db,
|
|
&analyze.resolver,
|
|
analyze.resolver.type_owner(),
|
|
)
|
|
.lower_ty(&crate::TypeRef::from_ast(&ctx, ty.clone()));
|
|
Some(Type::new_with_resolver(self.db, &analyze.resolver, ty))
|
|
}
|
|
|
|
pub fn resolve_trait(&self, path: &ast::Path) -> Option<Trait> {
|
|
let analyze = self.analyze(path.syntax())?;
|
|
let span_map = self.db.span_map(analyze.file_id);
|
|
let ctx = LowerCtx::with_span_map(self.db.upcast(), span_map);
|
|
let hir_path = Path::from_src(&ctx, path.clone())?;
|
|
match analyze.resolver.resolve_path_in_type_ns_fully(self.db.upcast(), &hir_path)? {
|
|
TypeNs::TraitId(id) => Some(Trait { id }),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn expr_adjustments(&self, expr: &ast::Expr) -> Option<Vec<Adjustment>> {
|
|
let mutability = |m| match m {
|
|
hir_ty::Mutability::Not => Mutability::Shared,
|
|
hir_ty::Mutability::Mut => Mutability::Mut,
|
|
};
|
|
|
|
let analyzer = self.analyze(expr.syntax())?;
|
|
|
|
let (mut source_ty, _) = analyzer.type_of_expr(self.db, expr)?;
|
|
|
|
analyzer.expr_adjustments(self.db, expr).map(|it| {
|
|
it.iter()
|
|
.map(|adjust| {
|
|
let target =
|
|
Type::new_with_resolver(self.db, &analyzer.resolver, adjust.target.clone());
|
|
let kind = match adjust.kind {
|
|
hir_ty::Adjust::NeverToAny => Adjust::NeverToAny,
|
|
hir_ty::Adjust::Deref(Some(hir_ty::OverloadedDeref(m))) => {
|
|
// FIXME: Should we handle unknown mutability better?
|
|
Adjust::Deref(Some(OverloadedDeref(
|
|
m.map(mutability).unwrap_or(Mutability::Shared),
|
|
)))
|
|
}
|
|
hir_ty::Adjust::Deref(None) => Adjust::Deref(None),
|
|
hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::RawPtr(m)) => {
|
|
Adjust::Borrow(AutoBorrow::RawPtr(mutability(m)))
|
|
}
|
|
hir_ty::Adjust::Borrow(hir_ty::AutoBorrow::Ref(m)) => {
|
|
Adjust::Borrow(AutoBorrow::Ref(mutability(m)))
|
|
}
|
|
hir_ty::Adjust::Pointer(pc) => Adjust::Pointer(pc),
|
|
};
|
|
|
|
// Update `source_ty` for the next adjustment
|
|
let source = mem::replace(&mut source_ty, target.clone());
|
|
|
|
Adjustment { source, target, kind }
|
|
})
|
|
.collect()
|
|
})
|
|
}
|
|
|
|
pub fn type_of_expr(&self, expr: &ast::Expr) -> Option<TypeInfo> {
|
|
self.analyze(expr.syntax())?
|
|
.type_of_expr(self.db, expr)
|
|
.map(|(ty, coerced)| TypeInfo { original: ty, adjusted: coerced })
|
|
}
|
|
|
|
pub fn type_of_pat(&self, pat: &ast::Pat) -> Option<TypeInfo> {
|
|
self.analyze(pat.syntax())?
|
|
.type_of_pat(self.db, pat)
|
|
.map(|(ty, coerced)| TypeInfo { original: ty, adjusted: coerced })
|
|
}
|
|
|
|
/// It also includes the changes that binding mode makes in the type. For example in
|
|
/// `let ref x @ Some(_) = None` the result of `type_of_pat` is `Option<T>` but the result
|
|
/// of this function is `&mut Option<T>`
|
|
pub fn type_of_binding_in_pat(&self, pat: &ast::IdentPat) -> Option<Type> {
|
|
self.analyze(pat.syntax())?.type_of_binding_in_pat(self.db, pat)
|
|
}
|
|
|
|
pub fn type_of_self(&self, param: &ast::SelfParam) -> Option<Type> {
|
|
self.analyze(param.syntax())?.type_of_self(self.db, param)
|
|
}
|
|
|
|
pub fn pattern_adjustments(&self, pat: &ast::Pat) -> SmallVec<[Type; 1]> {
|
|
self.analyze(pat.syntax())
|
|
.and_then(|it| it.pattern_adjustments(self.db, pat))
|
|
.unwrap_or_default()
|
|
}
|
|
|
|
pub fn binding_mode_of_pat(&self, pat: &ast::IdentPat) -> Option<BindingMode> {
|
|
self.analyze(pat.syntax())?.binding_mode_of_pat(self.db, pat)
|
|
}
|
|
|
|
pub fn resolve_method_call(&self, call: &ast::MethodCallExpr) -> Option<Function> {
|
|
self.analyze(call.syntax())?.resolve_method_call(self.db, call)
|
|
}
|
|
|
|
/// Attempts to resolve this call expression as a method call falling back to resolving it as a field.
|
|
pub fn resolve_method_call_fallback(
|
|
&self,
|
|
call: &ast::MethodCallExpr,
|
|
) -> Option<Either<Function, Field>> {
|
|
self.analyze(call.syntax())?.resolve_method_call_fallback(self.db, call)
|
|
}
|
|
|
|
fn resolve_await_to_poll(&self, await_expr: &ast::AwaitExpr) -> Option<FunctionId> {
|
|
self.analyze(await_expr.syntax())?.resolve_await_to_poll(self.db, await_expr)
|
|
}
|
|
|
|
fn resolve_prefix_expr(&self, prefix_expr: &ast::PrefixExpr) -> Option<FunctionId> {
|
|
self.analyze(prefix_expr.syntax())?.resolve_prefix_expr(self.db, prefix_expr)
|
|
}
|
|
|
|
fn resolve_index_expr(&self, index_expr: &ast::IndexExpr) -> Option<FunctionId> {
|
|
self.analyze(index_expr.syntax())?.resolve_index_expr(self.db, index_expr)
|
|
}
|
|
|
|
fn resolve_bin_expr(&self, bin_expr: &ast::BinExpr) -> Option<FunctionId> {
|
|
self.analyze(bin_expr.syntax())?.resolve_bin_expr(self.db, bin_expr)
|
|
}
|
|
|
|
fn resolve_try_expr(&self, try_expr: &ast::TryExpr) -> Option<FunctionId> {
|
|
self.analyze(try_expr.syntax())?.resolve_try_expr(self.db, try_expr)
|
|
}
|
|
|
|
pub fn resolve_method_call_as_callable(&self, call: &ast::MethodCallExpr) -> Option<Callable> {
|
|
self.analyze(call.syntax())?.resolve_method_call_as_callable(self.db, call)
|
|
}
|
|
|
|
pub fn resolve_field(&self, field: &ast::FieldExpr) -> Option<Either<Field, TupleField>> {
|
|
self.analyze(field.syntax())?.resolve_field(self.db, field)
|
|
}
|
|
|
|
pub fn resolve_field_fallback(
|
|
&self,
|
|
field: &ast::FieldExpr,
|
|
) -> Option<Either<Either<Field, TupleField>, Function>> {
|
|
self.analyze(field.syntax())?.resolve_field_fallback(self.db, field)
|
|
}
|
|
|
|
pub fn resolve_record_field(
|
|
&self,
|
|
field: &ast::RecordExprField,
|
|
) -> Option<(Field, Option<Local>, Type)> {
|
|
self.analyze(field.syntax())?.resolve_record_field(self.db, field)
|
|
}
|
|
|
|
pub fn resolve_record_pat_field(&self, field: &ast::RecordPatField) -> Option<(Field, Type)> {
|
|
self.analyze(field.syntax())?.resolve_record_pat_field(self.db, field)
|
|
}
|
|
|
|
pub fn resolve_macro_call(&self, macro_call: &ast::MacroCall) -> Option<Macro> {
|
|
let sa = self.analyze(macro_call.syntax())?;
|
|
let macro_call = self.find_file(macro_call.syntax()).with_value(macro_call);
|
|
sa.resolve_macro_call(self.db, macro_call)
|
|
}
|
|
|
|
pub fn is_unsafe_macro_call(&self, macro_call: &ast::MacroCall) -> bool {
|
|
let sa = match self.analyze(macro_call.syntax()) {
|
|
Some(it) => it,
|
|
None => return false,
|
|
};
|
|
let macro_call = self.find_file(macro_call.syntax()).with_value(macro_call);
|
|
sa.is_unsafe_macro_call(self.db, macro_call)
|
|
}
|
|
|
|
pub fn resolve_attr_macro_call(&self, item: &ast::Item) -> Option<Macro> {
|
|
let item_in_file = self.wrap_node_infile(item.clone());
|
|
let id = self.with_ctx(|ctx| {
|
|
let macro_call_id = ctx.item_to_macro_call(item_in_file)?;
|
|
macro_call_to_macro_id(ctx, self.db.upcast(), macro_call_id)
|
|
})?;
|
|
Some(Macro { id })
|
|
}
|
|
|
|
pub fn resolve_path(&self, path: &ast::Path) -> Option<PathResolution> {
|
|
self.analyze(path.syntax())?.resolve_path(self.db, path)
|
|
}
|
|
|
|
fn resolve_variant(&self, record_lit: ast::RecordExpr) -> Option<VariantId> {
|
|
self.analyze(record_lit.syntax())?.resolve_variant(self.db, record_lit)
|
|
}
|
|
|
|
pub fn resolve_bind_pat_to_const(&self, pat: &ast::IdentPat) -> Option<ModuleDef> {
|
|
self.analyze(pat.syntax())?.resolve_bind_pat_to_const(self.db, pat)
|
|
}
|
|
|
|
pub fn record_literal_missing_fields(&self, literal: &ast::RecordExpr) -> Vec<(Field, Type)> {
|
|
self.analyze(literal.syntax())
|
|
.and_then(|it| it.record_literal_missing_fields(self.db, literal))
|
|
.unwrap_or_default()
|
|
}
|
|
|
|
pub fn record_pattern_missing_fields(&self, pattern: &ast::RecordPat) -> Vec<(Field, Type)> {
|
|
self.analyze(pattern.syntax())
|
|
.and_then(|it| it.record_pattern_missing_fields(self.db, pattern))
|
|
.unwrap_or_default()
|
|
}
|
|
|
|
fn with_ctx<F: FnOnce(&mut SourceToDefCtx<'_, '_>) -> T, T>(&self, f: F) -> T {
|
|
let mut cache = self.s2d_cache.borrow_mut();
|
|
let mut ctx = SourceToDefCtx { db: self.db, dynmap_cache: &mut cache };
|
|
f(&mut ctx)
|
|
}
|
|
|
|
pub fn to_def<T: ToDef>(&self, src: &T) -> Option<T::Def> {
|
|
let src = self.find_file(src.syntax()).with_value(src).cloned();
|
|
T::to_def(self, src)
|
|
}
|
|
|
|
fn to_module_def(&self, file: FileId) -> impl Iterator<Item = Module> {
|
|
self.with_ctx(|ctx| ctx.file_to_def(file)).into_iter().map(Module::from)
|
|
}
|
|
|
|
pub fn scope(&self, node: &SyntaxNode) -> Option<SemanticsScope<'db>> {
|
|
self.analyze_no_infer(node).map(|SourceAnalyzer { file_id, resolver, .. }| SemanticsScope {
|
|
db: self.db,
|
|
file_id,
|
|
resolver,
|
|
})
|
|
}
|
|
|
|
pub fn scope_at_offset(
|
|
&self,
|
|
node: &SyntaxNode,
|
|
offset: TextSize,
|
|
) -> Option<SemanticsScope<'db>> {
|
|
self.analyze_with_offset_no_infer(node, offset).map(
|
|
|SourceAnalyzer { file_id, resolver, .. }| SemanticsScope {
|
|
db: self.db,
|
|
file_id,
|
|
resolver,
|
|
},
|
|
)
|
|
}
|
|
|
|
/// Search for a definition's source and cache its syntax tree
|
|
pub fn source<Def: HasSource>(&self, def: Def) -> Option<InFile<Def::Ast>>
|
|
where
|
|
Def::Ast: AstNode,
|
|
{
|
|
let res = def.source(self.db)?;
|
|
self.cache(find_root(res.value.syntax()), res.file_id);
|
|
Some(res)
|
|
}
|
|
|
|
/// Returns none if the file of the node is not part of a crate.
|
|
fn analyze(&self, node: &SyntaxNode) -> Option<SourceAnalyzer> {
|
|
self.analyze_impl(node, None, true)
|
|
}
|
|
|
|
/// Returns none if the file of the node is not part of a crate.
|
|
fn analyze_no_infer(&self, node: &SyntaxNode) -> Option<SourceAnalyzer> {
|
|
self.analyze_impl(node, None, false)
|
|
}
|
|
|
|
fn analyze_with_offset_no_infer(
|
|
&self,
|
|
node: &SyntaxNode,
|
|
offset: TextSize,
|
|
) -> Option<SourceAnalyzer> {
|
|
self.analyze_impl(node, Some(offset), false)
|
|
}
|
|
|
|
fn analyze_impl(
|
|
&self,
|
|
node: &SyntaxNode,
|
|
offset: Option<TextSize>,
|
|
infer_body: bool,
|
|
) -> Option<SourceAnalyzer> {
|
|
let _p = tracing::span!(tracing::Level::INFO, "Semantics::analyze_impl");
|
|
let node = self.find_file(node);
|
|
|
|
let container = self.with_ctx(|ctx| ctx.find_container(node))?;
|
|
|
|
let resolver = match container {
|
|
ChildContainer::DefWithBodyId(def) => {
|
|
return Some(if infer_body {
|
|
SourceAnalyzer::new_for_body(self.db, def, node, offset)
|
|
} else {
|
|
SourceAnalyzer::new_for_body_no_infer(self.db, def, node, offset)
|
|
})
|
|
}
|
|
ChildContainer::TraitId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::TraitAliasId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::ImplId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::ModuleId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::EnumId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::VariantId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::TypeAliasId(it) => it.resolver(self.db.upcast()),
|
|
ChildContainer::GenericDefId(it) => it.resolver(self.db.upcast()),
|
|
};
|
|
Some(SourceAnalyzer::new_for_resolver(resolver, node))
|
|
}
|
|
|
|
fn cache(&self, root_node: SyntaxNode, file_id: HirFileId) {
|
|
assert!(root_node.parent().is_none());
|
|
let mut cache = self.cache.borrow_mut();
|
|
let prev = cache.insert(root_node, file_id);
|
|
assert!(prev.is_none() || prev == Some(file_id))
|
|
}
|
|
|
|
pub fn assert_contains_node(&self, node: &SyntaxNode) {
|
|
self.find_file(node);
|
|
}
|
|
|
|
fn lookup(&self, root_node: &SyntaxNode) -> Option<HirFileId> {
|
|
let cache = self.cache.borrow();
|
|
cache.get(root_node).copied()
|
|
}
|
|
|
|
fn wrap_node_infile<N: AstNode>(&self, node: N) -> InFile<N> {
|
|
let InFile { file_id, .. } = self.find_file(node.syntax());
|
|
InFile::new(file_id, node)
|
|
}
|
|
|
|
/// Wraps the node in a [`InFile`] with the file id it belongs to.
|
|
fn find_file<'node>(&self, node: &'node SyntaxNode) -> InFile<&'node SyntaxNode> {
|
|
let root_node = find_root(node);
|
|
let file_id = self.lookup(&root_node).unwrap_or_else(|| {
|
|
panic!(
|
|
"\n\nFailed to lookup {:?} in this Semantics.\n\
|
|
Make sure to use only query nodes, derived from this instance of Semantics.\n\
|
|
root node: {:?}\n\
|
|
known nodes: {}\n\n",
|
|
node,
|
|
root_node,
|
|
self.cache
|
|
.borrow()
|
|
.keys()
|
|
.map(|it| format!("{it:?}"))
|
|
.collect::<Vec<_>>()
|
|
.join(", ")
|
|
)
|
|
});
|
|
InFile::new(file_id, node)
|
|
}
|
|
|
|
pub fn is_unsafe_method_call(&self, method_call_expr: &ast::MethodCallExpr) -> bool {
|
|
method_call_expr
|
|
.receiver()
|
|
.and_then(|expr| {
|
|
let field_expr = match expr {
|
|
ast::Expr::FieldExpr(field_expr) => field_expr,
|
|
_ => return None,
|
|
};
|
|
let ty = self.type_of_expr(&field_expr.expr()?)?.original;
|
|
if !ty.is_packed(self.db) {
|
|
return None;
|
|
}
|
|
|
|
let func = self.resolve_method_call(method_call_expr)?;
|
|
let res = match func.self_param(self.db)?.access(self.db) {
|
|
Access::Shared | Access::Exclusive => true,
|
|
Access::Owned => false,
|
|
};
|
|
Some(res)
|
|
})
|
|
.unwrap_or(false)
|
|
}
|
|
|
|
pub fn is_unsafe_ref_expr(&self, ref_expr: &ast::RefExpr) -> bool {
|
|
ref_expr
|
|
.expr()
|
|
.and_then(|expr| {
|
|
let field_expr = match expr {
|
|
ast::Expr::FieldExpr(field_expr) => field_expr,
|
|
_ => return None,
|
|
};
|
|
let expr = field_expr.expr()?;
|
|
self.type_of_expr(&expr)
|
|
})
|
|
// Binding a reference to a packed type is possibly unsafe.
|
|
.map(|ty| ty.original.is_packed(self.db))
|
|
.unwrap_or(false)
|
|
|
|
// FIXME This needs layout computation to be correct. It will highlight
|
|
// more than it should with the current implementation.
|
|
}
|
|
|
|
pub fn is_unsafe_ident_pat(&self, ident_pat: &ast::IdentPat) -> bool {
|
|
if ident_pat.ref_token().is_none() {
|
|
return false;
|
|
}
|
|
|
|
ident_pat
|
|
.syntax()
|
|
.parent()
|
|
.and_then(|parent| {
|
|
// `IdentPat` can live under `RecordPat` directly under `RecordPatField` or
|
|
// `RecordPatFieldList`. `RecordPatField` also lives under `RecordPatFieldList`,
|
|
// so this tries to lookup the `IdentPat` anywhere along that structure to the
|
|
// `RecordPat` so we can get the containing type.
|
|
let record_pat = ast::RecordPatField::cast(parent.clone())
|
|
.and_then(|record_pat| record_pat.syntax().parent())
|
|
.or_else(|| Some(parent.clone()))
|
|
.and_then(|parent| {
|
|
ast::RecordPatFieldList::cast(parent)?
|
|
.syntax()
|
|
.parent()
|
|
.and_then(ast::RecordPat::cast)
|
|
});
|
|
|
|
// If this doesn't match a `RecordPat`, fallback to a `LetStmt` to see if
|
|
// this is initialized from a `FieldExpr`.
|
|
if let Some(record_pat) = record_pat {
|
|
self.type_of_pat(&ast::Pat::RecordPat(record_pat))
|
|
} else if let Some(let_stmt) = ast::LetStmt::cast(parent) {
|
|
let field_expr = match let_stmt.initializer()? {
|
|
ast::Expr::FieldExpr(field_expr) => field_expr,
|
|
_ => return None,
|
|
};
|
|
|
|
self.type_of_expr(&field_expr.expr()?)
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
// Binding a reference to a packed type is possibly unsafe.
|
|
.map(|ty| ty.original.is_packed(self.db))
|
|
.unwrap_or(false)
|
|
}
|
|
|
|
/// Returns `true` if the `node` is inside an `unsafe` context.
|
|
pub fn is_inside_unsafe(&self, expr: &ast::Expr) -> bool {
|
|
let Some(enclosing_item) =
|
|
expr.syntax().ancestors().find_map(Either::<ast::Item, ast::Variant>::cast)
|
|
else {
|
|
return false;
|
|
};
|
|
|
|
let def = match &enclosing_item {
|
|
Either::Left(ast::Item::Fn(it)) if it.unsafe_token().is_some() => return true,
|
|
Either::Left(ast::Item::Fn(it)) => {
|
|
self.to_def(it).map(<_>::into).map(DefWithBodyId::FunctionId)
|
|
}
|
|
Either::Left(ast::Item::Const(it)) => {
|
|
self.to_def(it).map(<_>::into).map(DefWithBodyId::ConstId)
|
|
}
|
|
Either::Left(ast::Item::Static(it)) => {
|
|
self.to_def(it).map(<_>::into).map(DefWithBodyId::StaticId)
|
|
}
|
|
Either::Left(_) => None,
|
|
Either::Right(it) => self.to_def(it).map(<_>::into).map(DefWithBodyId::VariantId),
|
|
};
|
|
let Some(def) = def else { return false };
|
|
let enclosing_node = enclosing_item.as_ref().either(|i| i.syntax(), |v| v.syntax());
|
|
|
|
let (body, source_map) = self.db.body_with_source_map(def);
|
|
|
|
let file_id = self.find_file(expr.syntax()).file_id;
|
|
|
|
let Some(mut parent) = expr.syntax().parent() else { return false };
|
|
loop {
|
|
if &parent == enclosing_node {
|
|
break false;
|
|
}
|
|
|
|
if let Some(parent) = ast::Expr::cast(parent.clone()) {
|
|
if let Some(expr_id) = source_map.node_expr(InFile { file_id, value: &parent }) {
|
|
if let Expr::Unsafe { .. } = body[expr_id] {
|
|
break true;
|
|
}
|
|
}
|
|
}
|
|
|
|
let Some(parent_) = parent.parent() else { break false };
|
|
parent = parent_;
|
|
}
|
|
}
|
|
}
|
|
|
|
fn macro_call_to_macro_id(
|
|
ctx: &mut SourceToDefCtx<'_, '_>,
|
|
db: &dyn ExpandDatabase,
|
|
macro_call_id: MacroCallId,
|
|
) -> Option<MacroId> {
|
|
let loc = db.lookup_intern_macro_call(macro_call_id);
|
|
match loc.def.kind {
|
|
hir_expand::MacroDefKind::Declarative(it)
|
|
| hir_expand::MacroDefKind::BuiltIn(_, it)
|
|
| hir_expand::MacroDefKind::BuiltInAttr(_, it)
|
|
| hir_expand::MacroDefKind::BuiltInDerive(_, it)
|
|
| hir_expand::MacroDefKind::BuiltInEager(_, it) => {
|
|
ctx.macro_to_def(InFile::new(it.file_id, it.to_node(db)))
|
|
}
|
|
hir_expand::MacroDefKind::ProcMacro(_, _, it) => {
|
|
ctx.proc_macro_to_def(InFile::new(it.file_id, it.to_node(db)))
|
|
}
|
|
}
|
|
}
|
|
|
|
pub trait ToDef: AstNode + Clone {
|
|
type Def;
|
|
|
|
fn to_def(sema: &SemanticsImpl<'_>, src: InFile<Self>) -> Option<Self::Def>;
|
|
}
|
|
|
|
macro_rules! to_def_impls {
|
|
($(($def:path, $ast:path, $meth:ident)),* ,) => {$(
|
|
impl ToDef for $ast {
|
|
type Def = $def;
|
|
fn to_def(sema: &SemanticsImpl<'_>, src: InFile<Self>) -> Option<Self::Def> {
|
|
sema.with_ctx(|ctx| ctx.$meth(src)).map(<$def>::from)
|
|
}
|
|
}
|
|
)*}
|
|
}
|
|
|
|
to_def_impls![
|
|
(crate::Module, ast::Module, module_to_def),
|
|
(crate::Module, ast::SourceFile, source_file_to_def),
|
|
(crate::Struct, ast::Struct, struct_to_def),
|
|
(crate::Enum, ast::Enum, enum_to_def),
|
|
(crate::Union, ast::Union, union_to_def),
|
|
(crate::Trait, ast::Trait, trait_to_def),
|
|
(crate::TraitAlias, ast::TraitAlias, trait_alias_to_def),
|
|
(crate::Impl, ast::Impl, impl_to_def),
|
|
(crate::TypeAlias, ast::TypeAlias, type_alias_to_def),
|
|
(crate::Const, ast::Const, const_to_def),
|
|
(crate::Static, ast::Static, static_to_def),
|
|
(crate::Function, ast::Fn, fn_to_def),
|
|
(crate::Field, ast::RecordField, record_field_to_def),
|
|
(crate::Field, ast::TupleField, tuple_field_to_def),
|
|
(crate::Variant, ast::Variant, enum_variant_to_def),
|
|
(crate::TypeParam, ast::TypeParam, type_param_to_def),
|
|
(crate::LifetimeParam, ast::LifetimeParam, lifetime_param_to_def),
|
|
(crate::ConstParam, ast::ConstParam, const_param_to_def),
|
|
(crate::GenericParam, ast::GenericParam, generic_param_to_def),
|
|
(crate::Macro, ast::Macro, macro_to_def),
|
|
(crate::Local, ast::IdentPat, bind_pat_to_def),
|
|
(crate::Local, ast::SelfParam, self_param_to_def),
|
|
(crate::Label, ast::Label, label_to_def),
|
|
(crate::Adt, ast::Adt, adt_to_def),
|
|
(crate::ExternCrateDecl, ast::ExternCrate, extern_crate_to_def),
|
|
];
|
|
|
|
fn find_root(node: &SyntaxNode) -> SyntaxNode {
|
|
node.ancestors().last().unwrap()
|
|
}
|
|
|
|
/// `SemanticsScope` encapsulates the notion of a scope (the set of visible
|
|
/// names) at a particular program point.
|
|
///
|
|
/// It is a bit tricky, as scopes do not really exist inside the compiler.
|
|
/// Rather, the compiler directly computes for each reference the definition it
|
|
/// refers to. It might transiently compute the explicit scope map while doing
|
|
/// so, but, generally, this is not something left after the analysis.
|
|
///
|
|
/// However, we do very much need explicit scopes for IDE purposes --
|
|
/// completion, at its core, lists the contents of the current scope. The notion
|
|
/// of scope is also useful to answer questions like "what would be the meaning
|
|
/// of this piece of code if we inserted it into this position?".
|
|
///
|
|
/// So `SemanticsScope` is constructed from a specific program point (a syntax
|
|
/// node or just a raw offset) and provides access to the set of visible names
|
|
/// on a somewhat best-effort basis.
|
|
///
|
|
/// Note that if you are wondering "what does this specific existing name mean?",
|
|
/// you'd better use the `resolve_` family of methods.
|
|
#[derive(Debug)]
|
|
pub struct SemanticsScope<'a> {
|
|
pub db: &'a dyn HirDatabase,
|
|
file_id: HirFileId,
|
|
resolver: Resolver,
|
|
}
|
|
|
|
impl SemanticsScope<'_> {
|
|
pub fn module(&self) -> Module {
|
|
Module { id: self.resolver.module() }
|
|
}
|
|
|
|
pub fn krate(&self) -> Crate {
|
|
Crate { id: self.resolver.krate() }
|
|
}
|
|
|
|
pub(crate) fn resolver(&self) -> &Resolver {
|
|
&self.resolver
|
|
}
|
|
|
|
/// Note: `VisibleTraits` should be treated as an opaque type, passed into `Type
|
|
pub fn visible_traits(&self) -> VisibleTraits {
|
|
let resolver = &self.resolver;
|
|
VisibleTraits(resolver.traits_in_scope(self.db.upcast()))
|
|
}
|
|
|
|
/// Calls the passed closure `f` on all names in scope.
|
|
pub fn process_all_names(&self, f: &mut dyn FnMut(Name, ScopeDef)) {
|
|
let scope = self.resolver.names_in_scope(self.db.upcast());
|
|
for (name, entries) in scope {
|
|
for entry in entries {
|
|
let def = match entry {
|
|
resolver::ScopeDef::ModuleDef(it) => ScopeDef::ModuleDef(it.into()),
|
|
resolver::ScopeDef::Unknown => ScopeDef::Unknown,
|
|
resolver::ScopeDef::ImplSelfType(it) => ScopeDef::ImplSelfType(it.into()),
|
|
resolver::ScopeDef::AdtSelfType(it) => ScopeDef::AdtSelfType(it.into()),
|
|
resolver::ScopeDef::GenericParam(id) => ScopeDef::GenericParam(id.into()),
|
|
resolver::ScopeDef::Local(binding_id) => match self.resolver.body_owner() {
|
|
Some(parent) => ScopeDef::Local(Local { parent, binding_id }),
|
|
None => continue,
|
|
},
|
|
resolver::ScopeDef::Label(label_id) => match self.resolver.body_owner() {
|
|
Some(parent) => ScopeDef::Label(Label { parent, label_id }),
|
|
None => continue,
|
|
},
|
|
};
|
|
f(name.clone(), def)
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Resolve a path as-if it was written at the given scope. This is
|
|
/// necessary a heuristic, as it doesn't take hygiene into account.
|
|
pub fn speculative_resolve(&self, path: &ast::Path) -> Option<PathResolution> {
|
|
let ctx = LowerCtx::with_file_id(self.db.upcast(), self.file_id);
|
|
let path = Path::from_src(&ctx, path.clone())?;
|
|
resolve_hir_path(self.db, &self.resolver, &path)
|
|
}
|
|
|
|
/// Iterates over associated types that may be specified after the given path (using
|
|
/// `Ty::Assoc` syntax).
|
|
pub fn assoc_type_shorthand_candidates<R>(
|
|
&self,
|
|
resolution: &PathResolution,
|
|
mut cb: impl FnMut(&Name, TypeAlias) -> Option<R>,
|
|
) -> Option<R> {
|
|
let def = self.resolver.generic_def()?;
|
|
hir_ty::associated_type_shorthand_candidates(
|
|
self.db,
|
|
def,
|
|
resolution.in_type_ns()?,
|
|
|name, id| cb(name, id.into()),
|
|
)
|
|
}
|
|
|
|
pub fn extern_crates(&self) -> impl Iterator<Item = (Name, Module)> + '_ {
|
|
self.resolver.extern_crates_in_scope().map(|(name, id)| (name, Module { id }))
|
|
}
|
|
|
|
pub fn extern_crate_decls(&self) -> impl Iterator<Item = Name> + '_ {
|
|
self.resolver.extern_crate_decls_in_scope(self.db.upcast())
|
|
}
|
|
|
|
pub fn has_same_self_type(&self, other: &SemanticsScope<'_>) -> bool {
|
|
self.resolver.impl_def() == other.resolver.impl_def()
|
|
}
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct VisibleTraits(pub FxHashSet<TraitId>);
|
|
|
|
impl ops::Deref for VisibleTraits {
|
|
type Target = FxHashSet<TraitId>;
|
|
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.0
|
|
}
|
|
}
|