Include old tests
This commit is contained in:
Dawer
parent
7d675eda80
commit
894b4c64ff
@ -3,7 +3,7 @@
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//! This module provides lowering from [hir_def::expr::Pat] to [self::Pat] and match
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//! checking algorithm.
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//!
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//! It is a loose port of `rustc_mir_build::thir::pattern` module.
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//! It is modeled on the rustc module `rustc_mir_build::thir::pattern`.
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mod deconstruct_pat;
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mod pat_util;
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@ -341,110 +341,32 @@ mod tests {
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use crate::diagnostics::tests::check_diagnostics;
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#[test]
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fn unit() {
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fn empty_tuple() {
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check_diagnostics(
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r#"
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fn main() {
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match () { () => {} }
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match () { _ => {} }
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match () { }
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match () { }
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//^^ Missing match arm
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match (()) { }
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//^^^^ Missing match arm
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match () { _ => (), }
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match () { () => (), }
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match (()) { (()) => (), }
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}
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"#,
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);
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}
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#[test]
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fn tuple_of_units() {
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fn tuple_of_two_empty_tuple() {
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check_diagnostics(
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r#"
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fn main() {
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match ((), ()) { ((), ()) => {} }
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match ((), ()) { ((), _) => {} }
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match ((), ()) { (_, _) => {} }
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match ((), ()) { _ => {} }
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match ((), ()) { }
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match ((), ()) { }
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//^^^^^^^^ Missing match arm
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}
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"#,
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);
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}
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#[test]
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fn tuple_with_ellipsis() {
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check_diagnostics(
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r#"
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struct A; struct B;
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fn main(v: (A, (), B)) {
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match v { (A, ..) => {} }
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match v { (.., B) => {} }
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match v { (A, .., B) => {} }
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match v { (..) => {} }
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match v { }
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//^ Missing match arm
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}
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"#,
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);
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}
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#[test]
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fn strukt() {
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check_diagnostics(
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r#"
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struct A; struct B;
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struct S { a: A, b: B}
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fn main(v: S) {
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match v { S { a, b } => {} }
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match v { S { a: _, b: _ } => {} }
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match v { S { .. } => {} }
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match v { _ => {} }
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match v { }
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//^ Missing match arm
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}
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"#,
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);
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}
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#[test]
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fn c_enum() {
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check_diagnostics(
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r#"
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enum E { A, B }
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fn main(v: E) {
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match v { E::A | E::B => {} }
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match v { _ => {} }
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match v { E::A => {} }
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//^ Missing match arm
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match v { }
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//^ Missing match arm
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}
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"#,
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);
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}
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#[test]
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fn enum_() {
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check_diagnostics(
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r#"
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struct A; struct B;
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enum E { Tuple(A, B), Struct{ a: A, b: B } }
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fn main(v: E) {
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match v {
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E::Tuple(a, b) => {}
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E::Struct{ a, b } => {}
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}
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match v {
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E::Tuple(_, _) => {}
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E::Struct{..} => {}
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}
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match v {
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E::Tuple(..) => {}
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_ => {}
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}
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match v { E::Tuple(..) => {} }
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//^ Missing match arm
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match v { }
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//^ Missing match arm
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match ((), ()) { ((), ()) => (), }
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}
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"#,
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);
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@ -454,23 +376,601 @@ fn main(v: E) {
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fn boolean() {
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check_diagnostics(
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r#"
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fn main() {
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match true {
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true => {}
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false => {}
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fn test_main() {
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match false { }
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//^^^^^ Missing match arm
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match false { true => (), }
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//^^^^^ Missing match arm
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match (false, true) {}
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//^^^^^^^^^^^^^ Missing match arm
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match (false, true) { (true, true) => (), }
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//^^^^^^^^^^^^^ Missing match arm
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match (false, true) {
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//^^^^^^^^^^^^^ Missing match arm
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(false, true) => (),
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(false, false) => (),
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(true, false) => (),
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}
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match true {
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true | false => {}
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}
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match true {
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true => {}
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_ => {}
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}
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match true {}
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//^^^^ Missing match arm
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match true { true => {} }
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//^^^^ Missing match arm
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match (false, true) { (true, _x) => (), }
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//^^^^^^^^^^^^^ Missing match arm
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match false { true => (), false => (), }
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match (false, true) {
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(false, _) => (),
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(true, false) => (),
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(_, true) => (),
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}
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match (false, true) {
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(true, true) => (),
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(true, false) => (),
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(false, true) => (),
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(false, false) => (),
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}
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match (false, true) {
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(true, _x) => (),
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(false, true) => (),
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(false, false) => (),
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}
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match (false, true, false) {
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(false, ..) => (),
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(true, ..) => (),
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}
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match (false, true, false) {
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(.., false) => (),
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(.., true) => (),
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}
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match (false, true, false) { (..) => (), }
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}
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"#,
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);
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}
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#[test]
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fn tuple_of_tuple_and_bools() {
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check_diagnostics(
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r#"
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fn main() {
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match (false, ((), false)) {}
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//^^^^^^^^^^^^^^^^^^^^ Missing match arm
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match (false, ((), false)) { (true, ((), true)) => (), }
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//^^^^^^^^^^^^^^^^^^^^ Missing match arm
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match (false, ((), false)) { (true, _) => (), }
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//^^^^^^^^^^^^^^^^^^^^ Missing match arm
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match (false, ((), false)) {
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(true, ((), true)) => (),
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(true, ((), false)) => (),
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(false, ((), true)) => (),
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(false, ((), false)) => (),
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}
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match (false, ((), false)) {
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(true, ((), true)) => (),
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(true, ((), false)) => (),
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(false, _) => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn enums() {
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check_diagnostics(
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r#"
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enum Either { A, B, }
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fn main() {
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match Either::A { }
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//^^^^^^^^^ Missing match arm
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match Either::B { Either::A => (), }
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//^^^^^^^^^ Missing match arm
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match &Either::B {
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//^^^^^^^^^^ Missing match arm
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Either::A => (),
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}
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match Either::B {
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Either::A => (), Either::B => (),
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}
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match &Either::B {
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Either::A => (), Either::B => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn enum_containing_bool() {
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check_diagnostics(
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r#"
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enum Either { A(bool), B }
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fn main() {
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match Either::B { }
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//^^^^^^^^^ Missing match arm
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match Either::B {
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//^^^^^^^^^ Missing match arm
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Either::A(true) => (), Either::B => ()
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}
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match Either::B {
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Either::A(true) => (),
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Either::A(false) => (),
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Either::B => (),
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}
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match Either::B {
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Either::B => (),
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_ => (),
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}
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match Either::B {
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Either::A(_) => (),
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Either::B => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn enum_different_sizes() {
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check_diagnostics(
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r#"
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enum Either { A(bool), B(bool, bool) }
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fn main() {
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match Either::A(false) {
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//^^^^^^^^^^^^^^^^ Missing match arm
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Either::A(_) => (),
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Either::B(false, _) => (),
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}
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match Either::A(false) {
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Either::A(_) => (),
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Either::B(true, _) => (),
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Either::B(false, _) => (),
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}
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match Either::A(false) {
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Either::A(true) | Either::A(false) => (),
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Either::B(true, _) => (),
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Either::B(false, _) => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn tuple_of_enum_no_diagnostic() {
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check_diagnostics(
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r#"
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enum Either { A(bool), B(bool, bool) }
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enum Either2 { C, D }
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fn main() {
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match (Either::A(false), Either2::C) {
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(Either::A(true), _) | (Either::A(false), _) => (),
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(Either::B(true, _), Either2::C) => (),
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(Either::B(false, _), Either2::C) => (),
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(Either::B(_, _), Either2::D) => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn or_pattern_no_diagnostic() {
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check_diagnostics(
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r#"
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enum Either {A, B}
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fn main() {
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match (Either::A, Either::B) {
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(Either::A | Either::B, _) => (),
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}
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}"#,
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)
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}
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#[test]
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fn mismatched_types() {
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// Match statements with arms that don't match the
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// expression pattern do not fire this diagnostic.
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check_diagnostics(
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r#"
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enum Either { A, B }
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enum Either2 { C, D }
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fn main() {
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match Either::A {
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Either2::C => (),
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Either2::D => (),
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}
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match (true, false) {
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(true, false, true) => (),
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(true) => (),
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}
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match (0) { () => () }
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match Unresolved::Bar { Unresolved::Baz => () }
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}
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"#,
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);
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}
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#[test]
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fn malformed_match_arm_tuple_enum_missing_pattern() {
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// We are testing to be sure we don't panic here when the match
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// arm `Either::B` is missing its pattern.
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check_diagnostics(
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r#"
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enum Either { A, B(u32) }
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fn main() {
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match Either::A {
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Either::A => (),
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Either::B() => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn expr_diverges() {
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check_diagnostics(
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r#"
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enum Either { A, B }
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fn main() {
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match loop {} {
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Either::A => (),
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Either::B => (),
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}
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match loop {} {
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Either::A => (),
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}
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match loop { break Foo::A } {
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//^^^^^^^^^^^^^^^^^^^^^ Missing match arm
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Either::A => (),
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}
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match loop { break Foo::A } {
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Either::A => (),
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Either::B => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn expr_partially_diverges() {
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check_diagnostics(
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r#"
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enum Either<T> { A(T), B }
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fn foo() -> Either<!> { Either::B }
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fn main() -> u32 {
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match foo() {
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Either::A(val) => val,
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Either::B => 0,
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}
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}
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"#,
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);
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}
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#[test]
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fn enum_record() {
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check_diagnostics(
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r#"
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enum Either { A { foo: bool }, B }
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fn main() {
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let a = Either::A { foo: true };
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match a { }
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//^ Missing match arm
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match a { Either::A { foo: true } => () }
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//^ Missing match arm
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match a {
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Either::A { } => (),
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//^^^^^^^^^ Missing structure fields:
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// | - foo
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Either::B => (),
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}
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match a {
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//^ Missing match arm
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Either::A { } => (),
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} //^^^^^^^^^ Missing structure fields:
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// | - foo
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match a {
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Either::A { foo: true } => (),
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Either::A { foo: false } => (),
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Either::B => (),
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}
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match a {
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Either::A { foo: _ } => (),
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Either::B => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn enum_record_fields_out_of_order() {
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check_diagnostics(
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r#"
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enum Either {
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A { foo: bool, bar: () },
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B,
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}
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fn main() {
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let a = Either::A { foo: true, bar: () };
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match a {
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//^ Missing match arm
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Either::A { bar: (), foo: false } => (),
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Either::A { foo: true, bar: () } => (),
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}
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match a {
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Either::A { bar: (), foo: false } => (),
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Either::A { foo: true, bar: () } => (),
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Either::B => (),
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}
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}
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"#,
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);
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}
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#[test]
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fn enum_record_ellipsis() {
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check_diagnostics(
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r#"
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enum Either {
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A { foo: bool, bar: bool },
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B,
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}
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fn main() {
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let a = Either::B;
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match a {
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//^ Missing match arm
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Either::A { foo: true, .. } => (),
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Either::B => (),
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}
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match a {
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//^ Missing match arm
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Either::A { .. } => (),
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}
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match a {
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Either::A { foo: true, .. } => (),
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Either::A { foo: false, .. } => (),
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Either::B => (),
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}
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match a {
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Either::A { .. } => (),
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Either::B => (),
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}
|
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}
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"#,
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);
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}
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#[test]
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fn enum_tuple_partial_ellipsis() {
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check_diagnostics(
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r#"
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enum Either {
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A(bool, bool, bool, bool),
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B,
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}
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|
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fn main() {
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match Either::B {
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//^^^^^^^^^ Missing match arm
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Either::A(true, .., true) => (),
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Either::A(true, .., false) => (),
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Either::A(false, .., false) => (),
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Either::B => (),
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}
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match Either::B {
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//^^^^^^^^^ Missing match arm
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Either::A(true, .., true) => (),
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Either::A(true, .., false) => (),
|
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Either::A(.., true) => (),
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Either::B => (),
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}
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|
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match Either::B {
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Either::A(true, .., true) => (),
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Either::A(true, .., false) => (),
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Either::A(false, .., true) => (),
|
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Either::A(false, .., false) => (),
|
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Either::B => (),
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}
|
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match Either::B {
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Either::A(true, .., true) => (),
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Either::A(true, .., false) => (),
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Either::A(.., true) => (),
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Either::A(.., false) => (),
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Either::B => (),
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||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn never() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
enum Never {}
|
||||
|
||||
fn enum_(never: Never) {
|
||||
match never {}
|
||||
}
|
||||
fn enum_ref(never: &Never) {
|
||||
match never {}
|
||||
//^^^^^ Missing match arm
|
||||
}
|
||||
fn bang(never: !) {
|
||||
match never {}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn unknown_type() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
enum Option<T> { Some(T), None }
|
||||
|
||||
fn main() {
|
||||
// `Never` is deliberately not defined so that it's an uninferred type.
|
||||
match Option::<Never>::None {
|
||||
None => (),
|
||||
Some(never) => match never {},
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tuple_of_bools_with_ellipsis_at_end_missing_arm() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
fn main() {
|
||||
match (false, true, false) {
|
||||
//^^^^^^^^^^^^^^^^^^^^ Missing match arm
|
||||
(false, ..) => (),
|
||||
}
|
||||
}"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tuple_of_bools_with_ellipsis_at_beginning_missing_arm() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
fn main() {
|
||||
match (false, true, false) {
|
||||
//^^^^^^^^^^^^^^^^^^^^ Missing match arm
|
||||
(.., false) => (),
|
||||
}
|
||||
}"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tuple_of_bools_with_ellipsis_in_middle_missing_arm() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
fn main() {
|
||||
match (false, true, false) {
|
||||
//^^^^^^^^^^^^^^^^^^^^ Missing match arm
|
||||
(true, .., false) => (),
|
||||
}
|
||||
}"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn record_struct() {
|
||||
check_diagnostics(
|
||||
r#"struct Foo { a: bool }
|
||||
fn main(f: Foo) {
|
||||
match f {}
|
||||
//^ Missing match arm
|
||||
match f { Foo { a: true } => () }
|
||||
//^ Missing match arm
|
||||
match &f { Foo { a: true } => () }
|
||||
//^^ Missing match arm
|
||||
match f { Foo { a: _ } => () }
|
||||
match f {
|
||||
Foo { a: true } => (),
|
||||
Foo { a: false } => (),
|
||||
}
|
||||
match &f {
|
||||
Foo { a: true } => (),
|
||||
Foo { a: false } => (),
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn tuple_struct() {
|
||||
check_diagnostics(
|
||||
r#"struct Foo(bool);
|
||||
fn main(f: Foo) {
|
||||
match f {}
|
||||
//^ Missing match arm
|
||||
match f { Foo(true) => () }
|
||||
//^ Missing match arm
|
||||
match f {
|
||||
Foo(true) => (),
|
||||
Foo(false) => (),
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn unit_struct() {
|
||||
check_diagnostics(
|
||||
r#"struct Foo;
|
||||
fn main(f: Foo) {
|
||||
match f {}
|
||||
//^ Missing match arm
|
||||
match f { Foo => () }
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn record_struct_ellipsis() {
|
||||
check_diagnostics(
|
||||
r#"struct Foo { foo: bool, bar: bool }
|
||||
fn main(f: Foo) {
|
||||
match f { Foo { foo: true, .. } => () }
|
||||
//^ Missing match arm
|
||||
match f {
|
||||
//^ Missing match arm
|
||||
Foo { foo: true, .. } => (),
|
||||
Foo { bar: false, .. } => ()
|
||||
}
|
||||
match f { Foo { .. } => () }
|
||||
match f {
|
||||
Foo { foo: true, .. } => (),
|
||||
Foo { foo: false, .. } => ()
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn internal_or() {
|
||||
check_diagnostics(
|
||||
r#"
|
||||
fn main() {
|
||||
enum Either { A(bool), B }
|
||||
match Either::B {
|
||||
//^^^^^^^^^ Missing match arm
|
||||
Either::A(true | false) => (),
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
@ -483,7 +983,7 @@ fn no_panic_at_unimplemented_subpattern_type() {
|
||||
struct S { a: char}
|
||||
fn main(v: S) {
|
||||
match v { S{ a } => {} }
|
||||
match v { S{ a: _x } => {} }
|
||||
match v { S{ a: _x } => {} }
|
||||
match v { S{ a: 'a' } => {} }
|
||||
match v { S{..} => {} }
|
||||
match v { _ => {} }
|
||||
@ -509,4 +1009,32 @@ fn main() {
|
||||
"#,
|
||||
);
|
||||
}
|
||||
|
||||
mod false_negatives {
|
||||
//! The implementation of match checking here is a work in progress. As we roll this out, we
|
||||
//! prefer false negatives to false positives (ideally there would be no false positives). This
|
||||
//! test module should document known false negatives. Eventually we will have a complete
|
||||
//! implementation of match checking and this module will be empty.
|
||||
//!
|
||||
//! The reasons for documenting known false negatives:
|
||||
//!
|
||||
//! 1. It acts as a backlog of work that can be done to improve the behavior of the system.
|
||||
//! 2. It ensures the code doesn't panic when handling these cases.
|
||||
use super::*;
|
||||
|
||||
#[test]
|
||||
fn integers() {
|
||||
// We don't currently check integer exhaustiveness.
|
||||
check_diagnostics(
|
||||
r#"
|
||||
fn main() {
|
||||
match 5 {
|
||||
10 => (),
|
||||
11..20 => (),
|
||||
}
|
||||
}
|
||||
"#,
|
||||
);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user