-/// Helps with finding well-know things inside the standard library. This is
-/// somewhat similar to the known paths infra inside hir, but it different; We
-/// want to make sure that IDE specific paths don't become interesting inside
-/// the compiler itself as well.
-///
-/// Note that, by default, rust-analyzer tests **do not** include core or std
-/// libraries. If you are writing tests for functionality using [`FamousDefs`],
-/// you'd want to include minicore (see `test_utils::MiniCore`) declaration at
-/// the start of your tests:
-///
-/// ```
-/// //- minicore: iterator, ord, derive
-/// ```
-pub struct FamousDefs<'a, 'b>(pub &'a Semantics<'b, RootDatabase>, pub Option<Crate>);
-
-#[allow(non_snake_case)]
-impl FamousDefs<'_, '_> {
- pub fn std(&self) -> Option<Crate> {
- self.find_crate("std")
- }
-
- pub fn core(&self) -> Option<Crate> {
- self.find_crate("core")
- }
-
- pub fn core_cmp_Ord(&self) -> Option<Trait> {
- self.find_trait("core:cmp:Ord")
- }
-
- pub fn core_convert_From(&self) -> Option<Trait> {
- self.find_trait("core:convert:From")
- }
-
- pub fn core_convert_Into(&self) -> Option<Trait> {
- self.find_trait("core:convert:Into")
- }
-
- pub fn core_option_Option(&self) -> Option<Enum> {
- self.find_enum("core:option:Option")
- }
-
- pub fn core_result_Result(&self) -> Option<Enum> {
- self.find_enum("core:result:Result")
- }
-
- pub fn core_default_Default(&self) -> Option<Trait> {
- self.find_trait("core:default:Default")
- }
-
- pub fn core_iter_Iterator(&self) -> Option<Trait> {
- self.find_trait("core:iter:traits:iterator:Iterator")
- }
-
- pub fn core_iter_IntoIterator(&self) -> Option<Trait> {
- self.find_trait("core:iter:traits:collect:IntoIterator")
- }
-
- pub fn core_iter(&self) -> Option<Module> {
- self.find_module("core:iter")
- }
-
- pub fn core_ops_Deref(&self) -> Option<Trait> {
- self.find_trait("core:ops:Deref")
- }
-
- fn find_trait(&self, path: &str) -> Option<Trait> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Trait(it)) => Some(it),
- _ => None,
- }
- }
-
- fn find_enum(&self, path: &str) -> Option<Enum> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Adt(hir::Adt::Enum(it))) => Some(it),
- _ => None,
- }
- }
-
- fn find_module(&self, path: &str) -> Option<Module> {
- match self.find_def(path)? {
- hir::ScopeDef::ModuleDef(hir::ModuleDef::Module(it)) => Some(it),
- _ => None,
- }
- }
-
- fn find_crate(&self, name: &str) -> Option<Crate> {
- let krate = self.1?;
- let db = self.0.db;
- let res =
- krate.dependencies(db).into_iter().find(|dep| dep.name.to_string() == name)?.krate;
- Some(res)
- }
-
- fn find_def(&self, path: &str) -> Option<ScopeDef> {
- let db = self.0.db;
- let mut path = path.split(':');
- let trait_ = path.next_back()?;
- let std_crate = path.next()?;
- let std_crate = self.find_crate(std_crate)?;
- let mut module = std_crate.root_module(db);
- for segment in path {
- module = module.children(db).find_map(|child| {
- let name = child.name(db)?;
- if name.to_string() == segment {
- Some(child)
- } else {
- None
- }
- })?;
- }
- let def =
- module.scope(db, None).into_iter().find(|(name, _def)| name.to_string() == trait_)?.1;
- Some(def)
- }
-}
-