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//! FIXME: write short doc here
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<NavigationTarget> {
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<CrateId> {
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 = module.krate();
vec![krate.crate_id()]
}
#[cfg(test)]
mod tests {
use crate::{
mock_analysis::{analysis_and_position, MockAnalysis},
AnalysisChange, CrateGraph,
Edition::Edition2018,
};
use ra_cfg::CfgOptions;
#[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, CfgOptions::default());
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]);
}
}
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