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If an enum comes from a different module that has `ExtensibleEnums` feature enabled, unless it requires either `@unknown default:` or `@frozen` because it is allowed to introduce new cases in the future versions of the module.
111 lines
2.8 KiB
Swift
111 lines
2.8 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %empty-directory(%t/src)
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// RUN: split-file %s %t/src
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/// Build the library
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// RUN: %target-swift-frontend -emit-module %t/src/Lib.swift \
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// RUN: -module-name Lib \
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// RUN: -emit-module-path %t/Lib.swiftmodule \
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// RUN: -enable-experimental-feature ExtensibleEnums
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// Check that the errors are produced when using enums from module with `ExtensibleEnums` feature enabled.
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// RUN: %target-swift-frontend -typecheck %t/src/TestChecking.swift \
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// RUN: -swift-version 5 -module-name Client -I %t \
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// RUN: -verify
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// Test to make sure that if the library and client are in the same package enums are checked exhaustively
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/// Build the library
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// RUN: %target-swift-frontend -emit-module %t/src/Lib.swift \
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// RUN: -module-name Lib \
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// RUN: -package-name Test \
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// RUN: -emit-module-path %t/Lib.swiftmodule \
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// RUN: -enable-experimental-feature ExtensibleEnums
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// Different module but the same package
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// RUN: %target-swift-frontend -typecheck %t/src/TestSamePackage.swift \
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// RUN: -swift-version 5 -module-name Client -I %t \
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// RUN: -package-name Test \
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// RUN: -verify
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// REQUIRES: swift_feature_ExtensibleEnums
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//--- Lib.swift
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public enum E {
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case a
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}
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@frozen
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public enum F {
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case a
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case b
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}
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func test_same_module(e: E, f: F) {
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switch e { // Ok
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case .a: break
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}
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switch f { // Ok
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case .a: break
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case .b: break
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}
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}
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//--- TestChecking.swift
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import Lib
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func test(e: E, f: F) {
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// `E` is not marked as `@frozen` which means it gets new semantics
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switch e {
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// expected-error@-1 {{switch covers known cases, but 'E' may have additional unknown values, possibly added in future versions}}
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// expected-note@-2 {{handle unknown values using "@unknown default"}}
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case .a: break
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}
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switch e { // Ok (no warnings)
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case .a: break
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@unknown default: break
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}
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// `F` is marked as `@frozen` which means regular rules apply even with `ExtensibleEnums` feature enabled.
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switch f { // Ok (no errors because `F` is `@frozen`)
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case .a: break
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case .b: break
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}
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switch f { // expected-error {{switch must be exhaustive}} expected-note {{dd missing case: '.b'}}
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case .a: break
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}
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switch f { // expected-warning {{switch must be exhaustive}} expected-note {{dd missing case: '.b'}}
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case .a: break
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@unknown default: break
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}
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}
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//--- TestSamePackage.swift
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import Lib
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func test_no_default(e: E, f: F) {
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switch e { // Ok
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case .a: break
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}
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switch e { // expected-warning {{switch must be exhaustive}} expected-note {{dd missing case: '.a'}}
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@unknown default: break
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}
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switch f { // expected-error {{switch must be exhaustive}} expected-note {{dd missing case: '.b'}}
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case .a: break
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}
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switch f { // expected-warning {{switch must be exhaustive}} expected-note {{dd missing case: '.b'}}
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case .a: break
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@unknown default: break
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}
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}
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