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// RUN: %target-swift-frontend -emit-sil -swift-version 5 -enable-library-evolution -primary-file %s -o /dev/null -verify
// Re-run with optimizations to check if -O does not make any difference
// RUN: %target-swift-frontend -O -emit-sil -swift-version 5 -enable-library-evolution -primary-file %s -o /dev/null -verify
public enum NonExhaustive {
case a
}
@frozen public enum Exhaustive {
case a
}
public var optional: Void? = nil
public func testNonExhaustive(_ e: NonExhaustive) {
switch e {
case .a: break
}
switch e {
case .a: break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch e {
case .a: break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
switch (e, optional) {
case (.a, _): break
}
switch (e, optional) {
case (.a, _): break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch (e, optional) {
case (.a, _): break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
}
@inlinable
public func testNonExhaustiveInlinable(_ e: NonExhaustive) {
switch e {
// expected-warning@-1 {{switch covers known cases, but 'NonExhaustive' may have additional unknown values}}
// expected-note@-2 {{handle unknown values using "@unknown default"}}
case .a: break
}
switch e {
case .a: break
default: break
}
switch e {
case .a: break
@unknown default: break
}
switch (e, optional) {
// expected-warning@-1 {{switch covers known cases, but '(NonExhaustive, Void?)' may have additional unknown values}}
// expected-note@-2 {{add missing case: '(_, _)'}}
case (.a, _): break
}
switch (e, optional) {
case (.a, _): break
default: break
}
switch (e, optional) {
case (.a, _): break
@unknown default: break
}
}
public func testExhaustive(_ e: Exhaustive) {
switch e {
case .a: break
}
switch e {
case .a: break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch e {
case .a: break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
switch (e, optional) {
case (.a, _): break
}
switch (e, optional) {
case (.a, _): break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch (e, optional) {
case (.a, _): break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
}
@inlinable
public func testExhaustiveInlinable(_ e: Exhaustive) {
switch e {
case .a: break
}
switch e {
case .a: break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch e {
case .a: break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
switch (e, optional) {
case (.a, _): break
}
switch (e, optional) {
case (.a, _): break
default: break
// expected-warning@-1 {{default will never be executed}}
}
switch (e, optional) {
case (.a, _): break
@unknown default: break
// Ok, @unknown suppresses "default will never be executed"
}
}
|
