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// RUN: %target-typecheck-verify-swift -D ENABLE_C
enum E {
case A,B
#if ENABLE_C
case C
#endif
#if ENABLE_D
case D
#endif
}
func foo(x: E, intVal: Int) {
// Active guarded case first.
switch x {
#if ENABLE_C
case .C:
break
#endif
case .A:
break
case .B:
break
}
// Active guarded case last.
switch x {
case .A:
break
case .B:
break
#if ENABLE_C
case .C:
break
#endif
}
// Active guarded case middle.
switch x {
case .A:
break
#if ENABLE_C
case .C:
break
#endif
default:
break
}
// Active guarded case after default.
switch x {
case .A:
break
default:
break
#if ENABLE_C
case .C: // expected-error {{additional 'case' blocks cannot appear after the 'default' block of a 'switch'}}
break
#endif
}
// Inactive guarded case after default.
switch x {
case .A:
break
default:
break
#if ENABLE_D
case .D:
break
#endif
}
// #elseif.
switch x {
case .A:
break
case .B:
break
#if NEVER
#elseif ENABLE_C
case .C:
break
#endif
}
// #else.
switch x {
case .A:
break
case .B:
break
#if !ENABLE_C
#else
case .C:
break
#endif
}
// Nested #if.
switch x {
case .A:
break
case .B:
break
#if ENABLE_C
#if NEVER
#else
case .C:
break
#endif
#endif
}
// Exhaustive check.
switch x { // expected-error {{switch must be exhaustive}} expected-note {{add missing case: '.C'}}
case .A:
break
case .B:
break
#if NEVER
case .C:
break
#endif
}
// Exhaustive check 2.
switch x {
#if ENABLE_C
case .A:
break
case .B:
break
case .C:
break
#endif
}
// Empty check.
switch intVal { // expected-error {{'switch' statement body must have at least one 'case' or 'default' block; add a default case}}
#if NEVER
case 1:
break
case 2:
break
case 3:
break
#endif
}
// Non-'case' statement in '#else' block.
switch x {
case .A:
break
case .B:
break
#if ENABLE_C
case .C:
break
#else
break // expected-error {{all statements inside a switch must be covered by a 'case' or 'default'}}
#endif
}
// Non-'case' statement in '#if' block.
switch x { // expected-error {{switch must be exhaustive}} expected-note {{add missing case: '.C'}}
case .A:
break
case .B:
break
#if !ENABLE_C
break
#else
case .C: // expected-error {{'case' label can only appear inside a 'switch' statement}}
break
#endif
}
// '#if ... case' after non-covered statements.
switch x {
print() // expected-error {{all statements inside a switch must be covered by a 'case' or 'default'}}
#if ENABLE_C
case .NOT_EXIST: // expected-error {{type 'E' has no member 'NOT_EXIST'}}
break
case .C:
break
#endif
case .A, .B:
break
}
// '#if ... stmt' after non-covered statements.
switch x {
print() // expected-error {{all statements inside a switch must be covered by a 'case' or 'default'}}
#if true
print()
#endif
#if ENABLE_C
case .C:
break
#endif
case .A, .B:
break
}
// 'fallthrough' target.
switch intVal {
case 1:
fallthrough // expected-error {{'fallthrough' from a case which doesn't bind variable 'val'}}
#if ENABLE_C
case let val:
_ = val
break
#endif
case 2:
fallthrough // expected-error {{'fallthrough' without a following 'case' or 'default' block}}
#if NEVER
case 3:
break
#endif
}
}
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