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Parsing for `-enable-upcoming-feature` and `-enable-experimental-feature` is lenient by default because some projects need to be compatible with multiple language versions and compiler toolchains simultaneously, and strict diagnostics would be a nuisance. On the other hand, though, it would be useful to get feedback from the compiler when you attempt to enable a feature that doesn't exist. This change splits the difference by introducing new diagnostics for potential feature enablement misconfigurations but leaves those diagnostics ignored by default. Projects that wish to use them can specify `-Wwarning StrictLanguageFeatures`.
19 lines
1.6 KiB
Swift
19 lines
1.6 KiB
Swift
// RUN: %target-swift-frontend -typecheck -enable-upcoming-feature UnknownFeature %s 2>&1 | %FileCheck %s --check-prefix=CHECK-NO-DIAGS --allow-empty
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// With -Wwarning StrictLanguageFeatures, emit extra diagnostics for
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// misspecified features.
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// RUN: %target-swift-frontend -typecheck -Wwarning StrictLanguageFeatures -enable-upcoming-feature UnknownFeature %s 2>&1 | %FileCheck %s --check-prefix=CHECK-UNKNOWN-UPCOMING
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// RUN: %target-swift-frontend -typecheck -Wwarning StrictLanguageFeatures -enable-experimental-feature UnknownFeature %s 2>&1 | %FileCheck %s --check-prefix=CHECK-UNKNOWN-EXPERIMENTAL
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// RUN: %target-swift-frontend -typecheck -Wwarning StrictLanguageFeatures -swift-version 5 -enable-experimental-feature ConciseMagicFile %s 2>&1 | %FileCheck %s --check-prefix=CHECK-NOT-EXPERIMENTAL-ENABLE
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// RUN: %target-swift-frontend -typecheck -Wwarning StrictLanguageFeatures -swift-version 5 -enable-experimental-feature ConciseMagicFile -disable-experimental-feature ConciseMagicFile %s 2>&1 | %FileCheck %s --check-prefix=CHECK-NOT-EXPERIMENTAL-DISABLE
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// REQUIRES: swift_feature_ConciseMagicFile
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// CHECK-NO-DIAGS-NOT: warning:
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// CHECK-NO-DIAGS-NOT: error:
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// CHECK-UNKNOWN-UPCOMING: warning: 'UnknownFeature' is not a recognized upcoming feature
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// CHECK-UNKNOWN-EXPERIMENTAL: warning: 'UnknownFeature' is not a recognized experimental feature
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// CHECK-NOT-EXPERIMENTAL-ENABLE: warning: 'ConciseMagicFile' is not an experimental feature, use -enable-upcoming-feature instead
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// CHECK-NOT-EXPERIMENTAL-DISABLE: warning: 'ConciseMagicFile' is not an experimental feature, use -disable-upcoming-feature instead
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