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-rw-r--r--crates/hir_ty/src/diagnostics/expr.rs27
1 files changed, 20 insertions, 7 deletions
diff --git a/crates/hir_ty/src/diagnostics/expr.rs b/crates/hir_ty/src/diagnostics/expr.rs
index b4e453411..a1c484fdf 100644
--- a/crates/hir_ty/src/diagnostics/expr.rs
+++ b/crates/hir_ty/src/diagnostics/expr.rs
@@ -11,8 +11,8 @@ use crate::{
11 db::HirDatabase, 11 db::HirDatabase,
12 diagnostics::{ 12 diagnostics::{
13 match_check::{is_useful, MatchCheckCtx, Matrix, PatStack, Usefulness}, 13 match_check::{is_useful, MatchCheckCtx, Matrix, PatStack, Usefulness},
14 MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkInTailExpr, MissingPatFields, 14 MismatchedArgCount, MissingFields, MissingMatchArms, MissingOkOrSomeInTailExpr,
15 RemoveThisSemicolon, 15 MissingPatFields, RemoveThisSemicolon,
16 }, 16 },
17 utils::variant_data, 17 utils::variant_data,
18 ApplicationTy, InferenceResult, Ty, TypeCtor, 18 ApplicationTy, InferenceResult, Ty, TypeCtor,
@@ -306,27 +306,40 @@ impl<'a, 'b> ExprValidator<'a, 'b> {
306 }; 306 };
307 307
308 let core_result_path = path![core::result::Result]; 308 let core_result_path = path![core::result::Result];
309 let core_option_path = path![core::option::Option];
309 310
310 let resolver = self.owner.resolver(db.upcast()); 311 let resolver = self.owner.resolver(db.upcast());
311 let core_result_enum = match resolver.resolve_known_enum(db.upcast(), &core_result_path) { 312 let core_result_enum = match resolver.resolve_known_enum(db.upcast(), &core_result_path) {
312 Some(it) => it, 313 Some(it) => it,
313 _ => return, 314 _ => return,
314 }; 315 };
316 let core_option_enum = match resolver.resolve_known_enum(db.upcast(), &core_option_path) {
317 Some(it) => it,
318 _ => return,
319 };
315 320
316 let core_result_ctor = TypeCtor::Adt(AdtId::EnumId(core_result_enum)); 321 let core_result_ctor = TypeCtor::Adt(AdtId::EnumId(core_result_enum));
317 let params = match &mismatch.expected { 322 let core_option_ctor = TypeCtor::Adt(AdtId::EnumId(core_option_enum));
323
324 let (params, required) = match &mismatch.expected {
318 Ty::Apply(ApplicationTy { ctor, parameters }) if ctor == &core_result_ctor => { 325 Ty::Apply(ApplicationTy { ctor, parameters }) if ctor == &core_result_ctor => {
319 parameters 326 (parameters, "Ok".to_string())
327 }
328 Ty::Apply(ApplicationTy { ctor, parameters }) if ctor == &core_option_ctor => {
329 (parameters, "Some".to_string())
320 } 330 }
321 _ => return, 331 _ => return,
322 }; 332 };
323 333
324 if params.len() == 2 && params[0] == mismatch.actual { 334 if params.len() > 0 && params[0] == mismatch.actual {
325 let (_, source_map) = db.body_with_source_map(self.owner.into()); 335 let (_, source_map) = db.body_with_source_map(self.owner.into());
326 336
327 if let Ok(source_ptr) = source_map.expr_syntax(id) { 337 if let Ok(source_ptr) = source_map.expr_syntax(id) {
328 self.sink 338 self.sink.push(MissingOkOrSomeInTailExpr {
329 .push(MissingOkInTailExpr { file: source_ptr.file_id, expr: source_ptr.value }); 339 file: source_ptr.file_id,
340 expr: source_ptr.value,
341 required,
342 });
330 } 343 }
331 } 344 }
332 } 345 }