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Add test marks

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This commit is contained in:
Kirill Bulatov 2019-08-12 23:06:32 +03:00
parent 0ce05633a1
commit c1f47c3788
3 changed files with 16 additions and 1 deletions
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5
crates/ra_hir/src/marks.rs
View file

@ -11,4 +11,9 @@ test_utils::marks!(
match_ergonomics_ref
trait_resolution_on_fn_type
infer_while_let
match_complex_arm_ty
match_first_arm_never
match_second_arm_never
match_all_arms_never
match_no_never_arms
);

5
crates/ra_hir/src/ty/infer.rs
View file

@ -1096,8 +1096,10 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
}
let arm_ty = self.infer_expr(arm.expr, &expected);
if all_arms_never && Self::is_never(&arm_ty) {
tested_by!(match_first_arm_never);
resulting_match_ty = Some(arm_ty);
} else {
tested_by!(match_second_arm_never);
all_arms_never = false;
resulting_match_ty = None;
}
@ -1106,10 +1108,13 @@ impl<'a, D: HirDatabase> InferenceContext<'a, D> {
if let (Ty::Infer(expected_tv), Some(match_ty)) =
(&expected.ty, &resulting_match_ty)
{
tested_by!(match_all_arms_never);
self.var_unification_table
.union_value(expected_tv.to_inner(), TypeVarValue::Known(match_ty.clone()));
match_ty.clone()
} else {
tested_by!(match_no_never_arms);
tested_by!(match_complex_arm_ty);
expected.ty
}
}

7
crates/ra_hir/src/ty/tests.rs
View file

@ -3595,12 +3595,13 @@ fn no_such_field_diagnostics() {
);
}
#[cfg(test)]
mod match_with_never_tests {
use super::type_at;
use test_utils::covers;
#[test]
fn match_complex_arm_ty() {
covers!(match_complex_arm_ty);
let t = type_at(
r#"
//- /main.rs
@ -3624,6 +3625,7 @@ fn test(a: i32) {
#[test]
fn match_first_arm_never() {
covers!(match_first_arm_never);
let t = type_at(
r#"
//- /main.rs
@ -3644,6 +3646,7 @@ fn test(a: i32) {
#[test]
fn match_second_arm_never() {
covers!(match_second_arm_never);
let t = type_at(
r#"
//- /main.rs
@ -3664,6 +3667,7 @@ fn test(a: i32) {
#[test]
fn match_all_arms_never() {
covers!(match_all_arms_never);
let t = type_at(
r#"
//- /main.rs
@ -3682,6 +3686,7 @@ fn test(a: i32) {
#[test]
fn match_no_never_arms() {
covers!(match_no_never_arms);
let t = type_at(
r#"
//- /main.rs