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path: root/crates/ra_analysis/src/completion/complete_path.rs
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-rw-r--r--crates/ra_analysis/src/completion/complete_path.rs95
1 files changed, 95 insertions, 0 deletions
diff --git a/crates/ra_analysis/src/completion/complete_path.rs b/crates/ra_analysis/src/completion/complete_path.rs
new file mode 100644
index 000000000..5fc24af72
--- /dev/null
+++ b/crates/ra_analysis/src/completion/complete_path.rs
@@ -0,0 +1,95 @@
1use crate::{
2 Cancelable,
3 completion::{CompletionItem, Completions, CompletionKind::*, CompletionContext},
4};
5
6pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) -> Cancelable<()> {
7 let (path, module) = match (&ctx.path_prefix, &ctx.module) {
8 (Some(path), Some(module)) => (path.clone(), module),
9 _ => return Ok(()),
10 };
11 let def_id = match module.resolve_path(ctx.db, path)? {
12 Some(it) => it,
13 None => return Ok(()),
14 };
15 let target_module = match def_id.resolve(ctx.db)? {
16 hir::Def::Module(it) => it,
17 _ => return Ok(()),
18 };
19 let module_scope = target_module.scope(ctx.db)?;
20 module_scope.entries().for_each(|(name, _res)| {
21 CompletionItem::new(name.to_string())
22 .kind(Reference)
23 .add_to(acc)
24 });
25 Ok(())
26}
27
28#[cfg(test)]
29mod tests {
30 use crate::completion::{CompletionKind, check_completion};
31
32 fn check_reference_completion(code: &str, expected_completions: &str) {
33 check_completion(code, expected_completions, CompletionKind::Reference);
34 }
35
36 #[test]
37 fn completes_use_item_starting_with_self() {
38 check_reference_completion(
39 r"
40 use self::m::<|>;
41
42 mod m {
43 struct Bar;
44 }
45 ",
46 "Bar",
47 );
48 }
49
50 #[test]
51 fn completes_use_item_starting_with_crate() {
52 check_reference_completion(
53 "
54 //- /lib.rs
55 mod foo;
56 struct Spam;
57 //- /foo.rs
58 use crate::Sp<|>
59 ",
60 "Spam;foo",
61 );
62 }
63
64 #[test]
65 fn completes_nested_use_tree() {
66 check_reference_completion(
67 "
68 //- /lib.rs
69 mod foo;
70 struct Spam;
71 //- /foo.rs
72 use crate::{Sp<|>};
73 ",
74 "Spam;foo",
75 );
76 }
77
78 #[test]
79 fn completes_deeply_nested_use_tree() {
80 check_reference_completion(
81 "
82 //- /lib.rs
83 mod foo;
84 pub mod bar {
85 pub mod baz {
86 pub struct Spam;
87 }
88 }
89 //- /foo.rs
90 use crate::{bar::{baz::Sp<|>}};
91 ",
92 "Spam",
93 );
94 }
95}