bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide/src/inlay_hints.rs')
-rw-r--r--crates/ide/src/inlay_hints.rs50
1 files changed, 49 insertions, 1 deletions
diff --git a/crates/ide/src/inlay_hints.rs b/crates/ide/src/inlay_hints.rs
index 42009ea649..7a8edfea83 100644
--- a/crates/ide/src/inlay_hints.rs
+++ b/crates/ide/src/inlay_hints.rs
@@ -14,7 +14,7 @@ use smallvec::{smallvec, SmallVec};
use stdx::never;
use syntax::{
ast::{self, AstNode},
- match_ast, NodeOrToken, SyntaxNode, TextRange,
+ match_ast, NodeOrToken, SyntaxNode, TextRange, TextSize,
};
use text_edit::TextEdit;
@@ -359,6 +359,23 @@ fn label_of_ty(
Some(r)
}
+fn ty_to_text_edit(
+ sema: &Semantics<'_, RootDatabase>,
+ node_for_hint: &SyntaxNode,
+ ty: &hir::Type,
+ offset_to_insert: TextSize,
+ prefix: String,
+) -> Option<TextEdit> {
+ let scope = sema.scope(node_for_hint)?;
+ // FIXME: Limit the length and bail out on excess somehow?
+ let rendered = ty.display_source_code(scope.db, scope.module().into(), false).ok()?;
+
+ let mut builder = TextEdit::builder();
+ builder.insert(offset_to_insert, prefix);
+ builder.insert(offset_to_insert, rendered);
+ Some(builder.finish())
+}
+
// Feature: Inlay Hints
//
// rust-analyzer shows additional information inline with the source code.
@@ -566,6 +583,37 @@ mod tests {
expect.assert_debug_eq(&inlay_hints)
}
+ /// Computes inlay hints for the fixture, applies all the provided text edits and then runs
+ /// expect test.
+ #[track_caller]
+ pub(super) fn check_edit(config: InlayHintsConfig, ra_fixture: &str, expect: Expect) {
+ let (analysis, file_id) = fixture::file(ra_fixture);
+ let inlay_hints = analysis.inlay_hints(&config, file_id, None).unwrap();
+
+ let edits = inlay_hints
+ .into_iter()
+ .filter_map(|hint| hint.text_edit)
+ .reduce(|mut acc, next| {
+ acc.union(next).expect("merging text edits failed");
+ acc
+ })
+ .expect("no edit returned");
+
+ let mut actual = analysis.file_text(file_id).unwrap().to_string();
+ edits.apply(&mut actual);
+ expect.assert_eq(&actual);
+ }
+
+ #[track_caller]
+ pub(super) fn check_no_edit(config: InlayHintsConfig, ra_fixture: &str) {
+ let (analysis, file_id) = fixture::file(ra_fixture);
+ let inlay_hints = analysis.inlay_hints(&config, file_id, None).unwrap();
+
+ let edits: Vec<_> = inlay_hints.into_iter().filter_map(|hint| hint.text_edit).collect();
+
+ assert!(edits.is_empty(), "unexpected edits: {edits:?}");
+ }
+
#[test]
fn hints_disabled() {
check_with_config(