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-rw-r--r--crates/ra_ide/src/completion/complete_trait_impl.rs144
1 files changed, 128 insertions, 16 deletions
diff --git a/crates/ra_ide/src/completion/complete_trait_impl.rs b/crates/ra_ide/src/completion/complete_trait_impl.rs
index 18a1d2995..2bf654a57 100644
--- a/crates/ra_ide/src/completion/complete_trait_impl.rs
+++ b/crates/ra_ide/src/completion/complete_trait_impl.rs
@@ -34,7 +34,7 @@
34use hir::{self, Docs, HasSource}; 34use hir::{self, Docs, HasSource};
35use ra_assists::utils::get_missing_impl_items; 35use ra_assists::utils::get_missing_impl_items;
36use ra_syntax::{ 36use ra_syntax::{
37 ast::{self, edit}, 37 ast::{self, edit, ImplDef},
38 AstNode, SyntaxKind, SyntaxNode, TextRange, 38 AstNode, SyntaxKind, SyntaxNode, TextRange,
39}; 39};
40use ra_text_edit::TextEdit; 40use ra_text_edit::TextEdit;
@@ -47,22 +47,22 @@ use crate::{
47}; 47};
48 48
49pub(crate) fn complete_trait_impl(acc: &mut Completions, ctx: &CompletionContext) { 49pub(crate) fn complete_trait_impl(acc: &mut Completions, ctx: &CompletionContext) {
50 let trigger = ctx.token.ancestors().find(|p| match p.kind() { 50 if let Some((trigger, impl_def)) = completion_match(ctx) {
51 SyntaxKind::FN_DEF
52 | SyntaxKind::TYPE_ALIAS_DEF
53 | SyntaxKind::CONST_DEF
54 | SyntaxKind::BLOCK_EXPR => true,
55 _ => false,
56 });
57
58 let impl_def = trigger
59 .as_ref()
60 .and_then(|node| node.parent())
61 .and_then(|node| node.parent())
62 .and_then(ast::ImplDef::cast);
63
64 if let (Some(trigger), Some(impl_def)) = (trigger, impl_def) {
65 match trigger.kind() { 51 match trigger.kind() {
52 SyntaxKind::NAME_REF => {
53 get_missing_impl_items(&ctx.sema, &impl_def).iter().for_each(|item| match item {
54 hir::AssocItem::Function(fn_item) => {
55 add_function_impl(&trigger, acc, ctx, &fn_item)
56 }
57 hir::AssocItem::TypeAlias(type_item) => {
58 add_type_alias_impl(&trigger, acc, ctx, &type_item)
59 }
60 hir::AssocItem::Const(const_item) => {
61 add_const_impl(&trigger, acc, ctx, &const_item)
62 }
63 })
64 }
65
66 SyntaxKind::FN_DEF => { 66 SyntaxKind::FN_DEF => {
67 for missing_fn in get_missing_impl_items(&ctx.sema, &impl_def).iter().filter_map( 67 for missing_fn in get_missing_impl_items(&ctx.sema, &impl_def).iter().filter_map(
68 |item| match item { 68 |item| match item {
@@ -101,6 +101,21 @@ pub(crate) fn complete_trait_impl(acc: &mut Completions, ctx: &CompletionContext
101 } 101 }
102} 102}
103 103
104fn completion_match(ctx: &CompletionContext) -> Option<(SyntaxNode, ImplDef)> {
105 let (trigger, impl_def_offset) = ctx.token.ancestors().find_map(|p| match p.kind() {
106 SyntaxKind::FN_DEF
107 | SyntaxKind::TYPE_ALIAS_DEF
108 | SyntaxKind::CONST_DEF
109 | SyntaxKind::BLOCK_EXPR => Some((p, 2)),
110 SyntaxKind::NAME_REF => Some((p, 5)),
111 _ => None,
112 })?;
113 let impl_def = (0..impl_def_offset - 1)
114 .try_fold(trigger.parent()?, |t, _| t.parent())
115 .and_then(ast::ImplDef::cast)?;
116 Some((trigger, impl_def))
117}
118
104fn add_function_impl( 119fn add_function_impl(
105 fn_def_node: &SyntaxNode, 120 fn_def_node: &SyntaxNode,
106 acc: &mut Completions, 121 acc: &mut Completions,
@@ -210,6 +225,103 @@ mod tests {
210 } 225 }
211 226
212 #[test] 227 #[test]
228 fn name_ref_function_type_const() {
229 let completions = complete(
230 r"
231 trait Test {
232 type TestType;
233 const TEST_CONST: u16;
234 fn test();
235 }
236
237 struct T1;
238
239 impl Test for T1 {
240 t<|>
241 }
242 ",
243 );
244 assert_debug_snapshot!(completions, @r###"
245 [
246 CompletionItem {
247 label: "const TEST_CONST: u16 = ",
248 source_range: [209; 210),
249 delete: [209; 210),
250 insert: "const TEST_CONST: u16 = ",
251 kind: Const,
252 lookup: "TEST_CONST",
253 },
254 CompletionItem {
255 label: "fn test()",
256 source_range: [209; 210),
257 delete: [209; 210),
258 insert: "fn test() {}",
259 kind: Function,
260 lookup: "test",
261 },
262 CompletionItem {
263 label: "type TestType = ",
264 source_range: [209; 210),
265 delete: [209; 210),
266 insert: "type TestType = ",
267 kind: TypeAlias,
268 lookup: "TestType",
269 },
270 ]
271 "###);
272 }
273
274 #[test]
275 fn no_nested_fn_completions() {
276 let completions = complete(
277 r"
278 trait Test {
279 fn test();
280 fn test2();
281 }
282
283 struct T1;
284
285 impl Test for T1 {
286 fn test() {
287 t<|>
288 }
289 }
290 ",
291 );
292 assert_debug_snapshot!(completions, @r###"[]"###);
293 }
294
295 #[test]
296 fn name_ref_single_function() {
297 let completions = complete(
298 r"
299 trait Test {
300 fn test();
301 }
302
303 struct T1;
304
305 impl Test for T1 {
306 t<|>
307 }
308 ",
309 );
310 assert_debug_snapshot!(completions, @r###"
311 [
312 CompletionItem {
313 label: "fn test()",
314 source_range: [139; 140),
315 delete: [139; 140),
316 insert: "fn test() {}",
317 kind: Function,
318 lookup: "test",
319 },
320 ]
321 "###);
322 }
323
324 #[test]
213 fn single_function() { 325 fn single_function() {
214 let completions = complete( 326 let completions = complete(
215 r" 327 r"