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The error shown when the compiler fails to build a module from its textual interface has been creating some confusion. This is a proposal to make it more useful to the programmer not working in the SDK, insist on looking at the previous errors first, put less emphasis on possible compiler bugs, and always show alternatives to the incompatible compilers issue as this is the most common case now.
37 lines
2.8 KiB
Swift
37 lines
2.8 KiB
Swift
// Tests the diagnostics emitted when we can't build a module interface, and
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// particularly whether or not they call out compiler version mismatches.
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//
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// First, emit an empty module interface from the current compiler, then add
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// some invalid syntax to it:
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//
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// RUN: %empty-directory(%t)
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// RUN: echo "" | %target-swift-frontend -typecheck -emit-module-interface-path %t/UnbuildableCurrent.swiftinterface -enable-library-evolution -swift-version 5 -module-name UnbuildableCurrent -
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// RUN: echo "public func fn(_: String = #somethingYouveNeverHeardOf)" >> %t/UnbuildableCurrent.swiftinterface
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//
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// Next, modify a version of it so it looks like it was built with a different Swift compiler:
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//
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// RUN: sed -E -e 's|swift-compiler-version: (.*)|swift-compiler-version: NeoTokyoSwift 2000.42|' -e 's|UnbuildableCurrent|UnbuildableFuture|g' %t/UnbuildableCurrent.swiftinterface > %t/UnbuildableFuture.swiftinterface
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//
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// And finally, test:
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//
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// RUN: not %target-swift-frontend -typecheck %s -I %t -DCURRENT 2>&1 | %FileCheck -check-prefixes=ALL,CURRENT %s
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// RUN: not %target-swift-frontend -typecheck %s -I %t -DFUTURE 2>&1 | %FileCheck -check-prefixes=ALL,FUTURE %s
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//
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// Test that we get the same results when typechecking the interface:
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//
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// RUN: not %target-swift-frontend -typecheck-module-from-interface %t/UnbuildableCurrent.swiftinterface 2>&1 | %FileCheck -check-prefixes=ALL,CURRENT-VERIFY %s
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// RUN: not %target-swift-frontend -typecheck-module-from-interface %t/UnbuildableFuture.swiftinterface 2>&1 | %FileCheck -check-prefixes=ALL,FUTURE-VERIFY %s
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// ALL: Unbuildable{{[^.]+}}.swiftinterface:{{[0-9]+}}:{{[0-9]+}}: error: use of unknown directive '#somethingYouveNeverHeardOf'
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#if CURRENT
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import UnbuildableCurrent
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// CURRENT: unbuildable.swift:[[@LINE-1]]:8: error: failed to build module 'UnbuildableCurrent' for importation due to the errors above; the textual interface may be broken by project issues or a compiler bug
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#else
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import UnbuildableFuture
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// FUTURE: unbuildable.swift:[[@LINE-1]]:8: error: failed to build module 'UnbuildableFuture' for importation due to the errors above; the textual interface may be broken by project issues, differences between compilers (the producer 'NeoTokyoSwift 2000.42' and this compiler '{{.*Swift version.*}}') or a compiler bug
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#endif
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// CURRENT-VERIFY: UnbuildableCurrent.swiftinterface:1:1: error: failed to verify module interface of 'UnbuildableCurrent' due to the errors above; the textual interface may be broken by project issues or a compiler bug
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// FUTURE-VERIFY: UnbuildableFuture.swiftinterface:1:1: error: failed to verify module interface of 'UnbuildableFuture' due to the errors above; the textual interface may be broken by project issues, differences between compilers (the producer 'NeoTokyoSwift 2000.42' and this compiler '{{.*Swift version.*}}') or a compiler bug
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