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authorFlorian Diebold <[email protected]>2019-12-20 17:27:51 +0000
committerFlorian Diebold <[email protected]>2019-12-20 17:28:21 +0000
commit9c3f00a90651998c2cd4151f43f17cd92ef8eef1 (patch)
tree2b96a667cd1d7bee5ec41abe38d777bc181b674d /crates/ra_hir_ty
parent99d6f544f2a590d3feef47ce62d5cd9a8b463a47 (diff)
Fix coercion of last expression in function body
Diffstat (limited to 'crates/ra_hir_ty')
-rw-r--r--crates/ra_hir_ty/src/infer.rs2
-rw-r--r--crates/ra_hir_ty/src/infer/expr.rs2
-rw-r--r--crates/ra_hir_ty/src/tests/coercion.rs16
3 files changed, 18 insertions, 2 deletions
diff --git a/crates/ra_hir_ty/src/infer.rs b/crates/ra_hir_ty/src/infer.rs
index 9f2ed830e..e97b81473 100644
--- a/crates/ra_hir_ty/src/infer.rs
+++ b/crates/ra_hir_ty/src/infer.rs
@@ -460,7 +460,7 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
460 } 460 }
461 461
462 fn infer_body(&mut self) { 462 fn infer_body(&mut self) {
463 self.infer_expr(self.body.body_expr, &Expectation::has_type(self.return_ty.clone())); 463 self.infer_expr_coerce(self.body.body_expr, &Expectation::has_type(self.return_ty.clone()));
464 } 464 }
465 465
466 fn resolve_into_iter_item(&self) -> Option<TypeAliasId> { 466 fn resolve_into_iter_item(&self) -> Option<TypeAliasId> {
diff --git a/crates/ra_hir_ty/src/infer/expr.rs b/crates/ra_hir_ty/src/infer/expr.rs
index 253332c30..3af05394c 100644
--- a/crates/ra_hir_ty/src/infer/expr.rs
+++ b/crates/ra_hir_ty/src/infer/expr.rs
@@ -41,7 +41,7 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
41 41
42 /// Infer type of expression with possibly implicit coerce to the expected type. 42 /// Infer type of expression with possibly implicit coerce to the expected type.
43 /// Return the type after possible coercion. 43 /// Return the type after possible coercion.
44 fn infer_expr_coerce(&mut self, expr: ExprId, expected: &Expectation) -> Ty { 44 pub(super) fn infer_expr_coerce(&mut self, expr: ExprId, expected: &Expectation) -> Ty {
45 let ty = self.infer_expr_inner(expr, &expected); 45 let ty = self.infer_expr_inner(expr, &expected);
46 let ty = if !self.coerce(&ty, &expected.ty) { 46 let ty = if !self.coerce(&ty, &expected.ty) {
47 self.result 47 self.result
diff --git a/crates/ra_hir_ty/src/tests/coercion.rs b/crates/ra_hir_ty/src/tests/coercion.rs
index 33d6ca403..793c23e41 100644
--- a/crates/ra_hir_ty/src/tests/coercion.rs
+++ b/crates/ra_hir_ty/src/tests/coercion.rs
@@ -370,6 +370,22 @@ fn test() {
370} 370}
371 371
372#[test] 372#[test]
373fn return_coerce_unknown() {
374 assert_snapshot!(
375 infer_with_mismatches(r#"
376fn foo() -> u32 {
377 return unknown;
378}
379"#, true),
380 @r###"
381 [17; 40) '{ ...own; }': !
382 [23; 37) 'return unknown': !
383 [30; 37) 'unknown': u32
384 "###
385 );
386}
387
388#[test]
373fn coerce_autoderef() { 389fn coerce_autoderef() {
374 assert_snapshot!( 390 assert_snapshot!(
375 infer_with_mismatches(r#" 391 infer_with_mismatches(r#"