From 7584260b9a222658e3e38f1d2506da95e6106283 Mon Sep 17 00:00:00 2001 From: Kirill Bulatov Date: Sun, 21 Feb 2021 00:14:27 +0200 Subject: Find the code to change --- crates/ide_db/src/helpers/import_assets.rs | 185 ++++++++++++++++++++--------- 1 file changed, 130 insertions(+), 55 deletions(-) (limited to 'crates') diff --git a/crates/ide_db/src/helpers/import_assets.rs b/crates/ide_db/src/helpers/import_assets.rs index 513128eae..0da4bdd0e 100644 --- a/crates/ide_db/src/helpers/import_assets.rs +++ b/crates/ide_db/src/helpers/import_assets.rs @@ -1,6 +1,9 @@ //! Look up accessible paths for items. use either::Either; -use hir::{AsAssocItem, AssocItem, Crate, MacroDef, Module, ModuleDef, PrefixKind, Semantics}; +use hir::{ + AsAssocItem, AssocItem, Crate, ItemInNs, MacroDef, ModPath, Module, ModuleDef, PathResolution, + PrefixKind, Semantics, +}; use rustc_hash::FxHashSet; use syntax::{ast, AstNode}; @@ -145,7 +148,6 @@ impl ImportAssets { prefixed: Option, ) -> Vec<(hir::ModPath, hir::ItemInNs)> { let current_crate = self.module_with_candidate.krate(); - let import_candidate = &self.import_candidate; let imports_for_candidate_name = match self.name_to_import() { NameToImport::Exact(exact_name) => { @@ -157,7 +159,7 @@ impl ImportAssets { // and https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Fwg-rls-2.2E0/topic/Blanket.20trait.20impls.20lookup // for the details NameToImport::Fuzzy(fuzzy_name) => { - let (assoc_item_search, limit) = if import_candidate.is_trait_candidate() { + let (assoc_item_search, limit) = if self.import_candidate.is_trait_candidate() { (AssocItemSearch::AssocItemsOnly, None) } else { (AssocItemSearch::Exclude, Some(DEFAULT_QUERY_SEARCH_LIMIT)) @@ -172,59 +174,108 @@ impl ImportAssets { } }; - let db = sema.db; - let mut res = - applicable_defs(import_candidate, current_crate, db, imports_for_candidate_name) - .filter_map(|candidate| { - let item: hir::ItemInNs = candidate.clone().either(Into::into, Into::into); - - let item_to_search = if import_candidate.is_trait_candidate() { - let canidate_trait = match candidate { - Either::Left(module_def) => { - module_def.as_assoc_item(db)?.containing_trait(db) - } - _ => None, - }?; - ModuleDef::from(canidate_trait).into() - } else { - item - }; - let mod_path = if let Some(prefix_kind) = prefixed { - self.module_with_candidate.find_use_path_prefixed( - db, - item_to_search, - prefix_kind, - ) - } else { - self.module_with_candidate.find_use_path(db, item_to_search) - }; - - mod_path.zip(Some(item)) - }) - .filter(|(use_path, _)| use_path.len() > 1) - .collect::>(); + let mut res = self + .applicable_defs(sema, prefixed, imports_for_candidate_name) + .filter(|(use_path, _)| use_path.len() > 1) + .collect::>(); res.sort_by_cached_key(|(path, _)| path.clone()); res } + + fn applicable_defs<'a>( + &self, + sema: &'a Semantics, + prefixed: Option, + unfiltered_imports: Box> + 'a>, + ) -> Box + 'a> { + let current_crate = self.module_with_candidate.krate(); + let db = sema.db; + + match &self.import_candidate { + ImportCandidate::Path(path_candidate) => path_applicable_defs( + sema, + path_candidate, + unfiltered_imports, + self.module_with_candidate, + prefixed, + ), + ImportCandidate::TraitAssocItem(trait_candidate) => trait_applicable_defs( + db, + current_crate, + trait_candidate, + true, + unfiltered_imports, + self.module_with_candidate, + prefixed, + ), + ImportCandidate::TraitMethod(trait_candidate) => trait_applicable_defs( + db, + current_crate, + trait_candidate, + false, + unfiltered_imports, + self.module_with_candidate, + prefixed, + ), + } + } } -fn applicable_defs<'a>( - import_candidate: &ImportCandidate, - current_crate: Crate, - db: &RootDatabase, - unfiltered_imports: Box> + 'a>, -) -> Box> + 'a> { - // TODO kb this needs to consider various path prefixes, etc. - let receiver_ty = match import_candidate { - ImportCandidate::Path(_) => return unfiltered_imports, - ImportCandidate::TraitAssocItem(candidate) | ImportCandidate::TraitMethod(candidate) => { - &candidate.receiver_ty +fn path_applicable_defs<'a>( + sema: &'a Semantics, + path_candidate: &PathImportCandidate, + unfiltered_defs: Box> + 'a>, + module_with_candidate: Module, + prefixed: Option, +) -> Box + 'a> { + let applicable_defs = unfiltered_defs + .map(|candidate| candidate.either(ItemInNs::from, ItemInNs::from)) + .filter_map(move |item_to_search| { + get_mod_path(sema.db, item_to_search, &module_with_candidate, prefixed) + .zip(Some(item_to_search)) + }); + + let unresolved_qualifier = match &path_candidate.unresolved_qualifier { + Some(qualifier) => qualifier, + None => { + // TODO kb too many boxes tossed around + return Box::new(applicable_defs); } }; + // TODO kb filter out items: found path should end with `qualifier::Name` or `qualifier::Something` for fuzzy search case. + + // TODO kb find a way to turn a qualifier into the corresponding ModuleDef. Maybe through the unfiltered data? + if let Some(qualifier_start_resolution) = resolve_qualifier_start(sema, unresolved_qualifier) { + // TODO kb ascend until an unresolved segment part appears + } else { + // first segment is already unresolved, need to turn it into ModuleDef somehow + } + + return Box::new(applicable_defs); +} + +fn resolve_qualifier_start( + sema: &Semantics, + qualifier: &ast::Path, +) -> Option { + let qualifier_start = qualifier.syntax().descendants().find_map(ast::NameRef::cast)?; + let qualifier_start_path = qualifier_start.syntax().ancestors().find_map(ast::Path::cast)?; + sema.resolve_path(&qualifier_start_path) +} + +fn trait_applicable_defs<'a>( + db: &'a RootDatabase, + current_crate: Crate, + trait_candidate: &TraitImportCandidate, + trait_assoc_item: bool, + unfiltered_defs: Box> + 'a>, + module_with_candidate: Module, + prefixed: Option, +) -> Box + 'a> { let mut required_assoc_items = FxHashSet::default(); - let trait_candidates = unfiltered_imports + let trait_candidates = unfiltered_defs .filter_map(|input| match input { Either::Left(module_def) => module_def.as_assoc_item(db), _ => None, @@ -238,9 +289,8 @@ fn applicable_defs<'a>( let mut applicable_defs = FxHashSet::default(); - match import_candidate { - ImportCandidate::Path(_) => unreachable!(), - ImportCandidate::TraitAssocItem(_) => receiver_ty.iterate_path_candidates( + if trait_assoc_item { + trait_candidate.receiver_ty.iterate_path_candidates( db, current_crate, &trait_candidates, @@ -252,12 +302,13 @@ fn applicable_defs<'a>( return None; } } - applicable_defs.insert(Either::Left(assoc_to_module_def(assoc))); + applicable_defs.insert(assoc_to_module_def(assoc)); } None::<()> }, - ), - ImportCandidate::TraitMethod(_) => receiver_ty.iterate_method_candidates( + ) + } else { + trait_candidate.receiver_ty.iterate_method_candidates( db, current_crate, &trait_candidates, @@ -265,14 +316,38 @@ fn applicable_defs<'a>( |_, function| { let assoc = function.as_assoc_item(db)?; if required_assoc_items.contains(&assoc) { - applicable_defs.insert(Either::Left(assoc_to_module_def(assoc))); + applicable_defs.insert(assoc_to_module_def(assoc)); } None::<()> }, - ), + ) }; - Box::new(applicable_defs.into_iter()) + Box::new( + applicable_defs + .into_iter() + .filter_map(move |candidate| { + let canidate_trait = candidate.as_assoc_item(db)?.containing_trait(db)?; + Some(ItemInNs::from(ModuleDef::from(canidate_trait))) + }) + .filter_map(move |item_to_search| { + get_mod_path(db, item_to_search, &module_with_candidate, prefixed) + .zip(Some(item_to_search)) + }), + ) +} + +fn get_mod_path( + db: &RootDatabase, + item_to_search: ItemInNs, + module_with_candidate: &Module, + prefixed: Option, +) -> Option { + if let Some(prefix_kind) = prefixed { + module_with_candidate.find_use_path_prefixed(db, item_to_search, prefix_kind) + } else { + module_with_candidate.find_use_path(db, item_to_search) + } } fn assoc_to_module_def(assoc: AssocItem) -> ModuleDef { -- cgit v1.2.3