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use ra_db::{Cancelable, FilePosition};
use crate::{NavigationTarget, db::RootDatabase};
/// 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,
) -> Cancelable<Vec<NavigationTarget>> {
let module = match hir::source_binder::module_from_position(db, position)? {
None => return Ok(Vec::new()),
Some(it) => it,
};
let nav = NavigationTarget::from_module_to_decl(db, module)?;
Ok(vec![nav])
}
#[cfg(test)]
mod tests {
use crate::mock_analysis::analysis_and_position;
#[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)");
}
}
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