use ra_db::{CrateId, FileId, FilePosition}; use crate::{db::RootDatabase, NavigationTarget}; /// This returns `Vec` because a module may be included from several places. We /// don't handle this case yet though, so the Vec has length at most one. pub(crate) fn parent_module(db: &RootDatabase, position: FilePosition) -> Vec { let src = hir::ModuleSource::from_position(db, position); let module = match hir::Module::from_definition( db, hir::Source { file_id: position.file_id.into(), ast: src }, ) { None => return Vec::new(), Some(it) => it, }; let nav = NavigationTarget::from_module_to_decl(db, module); vec![nav] } /// Returns `Vec` for the same reason as `parent_module` pub(crate) fn crate_for(db: &RootDatabase, file_id: FileId) -> Vec { let src = hir::ModuleSource::from_file_id(db, file_id); let module = match hir::Module::from_definition(db, hir::Source { file_id: file_id.into(), ast: src }) { Some(it) => it, None => return Vec::new(), }; let krate = match module.krate(db) { Some(it) => it, None => return Vec::new(), }; vec![krate.crate_id()] } #[cfg(test)] mod tests { use crate::{ mock_analysis::{analysis_and_position, MockAnalysis}, AnalysisChange, CrateGraph, Edition::Edition2018, }; #[test] fn test_resolve_parent_module() { let (analysis, pos) = analysis_and_position( " //- /lib.rs mod foo; //- /foo.rs <|>// empty ", ); let nav = analysis.parent_module(pos).unwrap().pop().unwrap(); nav.assert_match("foo MODULE FileId(1) [0; 8)"); } #[test] fn test_resolve_parent_module_for_inline() { let (analysis, pos) = analysis_and_position( " //- /lib.rs mod foo { mod bar { mod baz { <|> } } } ", ); let nav = analysis.parent_module(pos).unwrap().pop().unwrap(); nav.assert_match("baz MODULE FileId(1) [32; 44)"); } #[test] fn test_resolve_crate_root() { let mock = MockAnalysis::with_files( " //- /bar.rs mod foo; //- /foo.rs // empty <|> ", ); let root_file = mock.id_of("/bar.rs"); let mod_file = mock.id_of("/foo.rs"); let mut host = mock.analysis_host(); assert!(host.analysis().crate_for(mod_file).unwrap().is_empty()); let mut crate_graph = CrateGraph::default(); let crate_id = crate_graph.add_crate_root(root_file, Edition2018); let mut change = AnalysisChange::new(); change.set_crate_graph(crate_graph); host.apply_change(change); assert_eq!(host.analysis().crate_for(mod_file).unwrap(), vec![crate_id]); } }