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e4cf74abfa
For the most part, the differences between the diagnostics introduced
by the C++ implementation and the new SwiftIfConfig implementation are
cosmetic, so these are only wording changes.
The one major difference is that we've dropped the warnings about
potential typos in os/arch checks. For example, if one writes:
#if os(bisionos)
// ...
#endif
The C++ implementation will produce a warning "unknown operating system
for build configuration 'os'" with a note asking "did you mean
'visionOS'"? These warnings rely on a static list of known operating
systems and architectures, which is somewhat unfortunate: the whole
point of these checks is that the Swift you're dealing with might not
have support for those operating systems/architectures, so while these
warnings can be helpful in a few cases, they also cause false
positives when porting. Therefore, I chose not to bring them forward.
163 lines
3.6 KiB
Swift
163 lines
3.6 KiB
Swift
// RUN: %target-typecheck-verify-swift -D FOO -D BAZ -swift-version 4
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#if FOO == BAZ // expected-error{{expected '&&' or '||' expression}}
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var x = 0
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#endif
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#if ^FOO // expected-error {{expected unary '!' expression}}
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var y = 0
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#endif
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#if foo(BAR) // expected-error {{invalid conditional compilation expression}}
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var z = 0
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#endif
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#if FOO || !FOO
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func f() {}
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#endif ; f() // expected-error {{extra tokens following conditional compilation directive}}
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#if FOO || !FOO
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func g() {}
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#else g() // expected-error {{extra tokens following conditional compilation directive}}
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#endif
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#if FOO || !FOO
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func h() {}
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#else /* aaa */
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#endif /* bbb */
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#if foo.bar() // expected-error {{invalid conditional compilation expression}}
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.baz()
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#endif
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// <https://twitter.com/practicalswift/status/829066902869786625>
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#if // expected-error {{incomplete condition in conditional compilation directive}}
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#if 0 == // expected-error {{incomplete condition in conditional compilation directive}}
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#if 0= // expected-error {{incomplete condition in conditional compilation directive}} expected-error {{'=' must have consistent whitespace on both sides}}
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class Foo {
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#if // expected-error {{incomplete condition in conditional compilation directive}}
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#if 0 == // expected-error {{incomplete condition in conditional compilation directive}}
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#if 0= // expected-error {{incomplete condition in conditional compilation directive}} expected-error {{'=' must have consistent whitespace on both sides}}
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}
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struct S {
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#if FOO
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#else
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#else // expected-error {{further conditions after #else are unreachable}}
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#endif
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#if FOO
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#elseif BAR
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#elseif BAZ
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#else
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#endif
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}
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#if FOO
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#else
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#else // expected-error {{further conditions after #else are unreachable}}
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#endif
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#if FOO
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#elseif BAR
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#elseif BAZ
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#else
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#endif
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#if os(ios)
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#endif
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#if os(uOS)
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#endif
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#if os(xxxxxxd)
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#endif
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#if os(bisionos)
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#endif
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#if arch(arn)
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#endif
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#if _endian(mid) // expected-warning {{unknown endianness for build configuration '_endian'}}
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#endif
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LABEL: #if true // expected-error {{expected statement}}
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func fn_i() {}
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#endif
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fn_i() // OK
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try #if false // expected-error {{expected expression}}
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#else
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func fn_j() {}
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#endif
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fn_j() // OK
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#if foo || bar || nonExistent() // expected-error {{invalid conditional compilation expression}}
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#endif
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#if FOO = false
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// expected-error @-1 {{invalid conditional compilation expression}}
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undefinedFunc() // ignored.
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#else
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undefinedFunc() // expected-error {{cannot find 'undefinedFunc' in scope}}
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#endif
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#if false
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#elseif FOO ? true : false
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// expected-error @-1 {{invalid conditional compilation expression}}
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undefinedFunc() // ignored.
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#else
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undefinedFunc() // expected-error {{cannot find 'undefinedFunc' in scope}}
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#endif
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/// Invalid platform condition arguments don't invalidate the whole condition.
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// expected-warning@+1{{unknown endianness}}
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#if !arch(arn) && !os(ystem) && !_endian(ness)
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func fn_k() {}
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#endif
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fn_k()
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#if os(cillator) || arch(i3rm)
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func undefinedFunc() // ignored.
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#endif
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undefinedFunc() // expected-error {{cannot find 'undefinedFunc' in scope}}
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#if os(simulator)
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#endif
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#if arch(iOS)
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#endif
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#if _endian(arm64) // expected-warning {{unknown endianness for build configuration '_endian'}}
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#endif
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#if targetEnvironment(_ObjC)
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#endif
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#if os(iOS) || os(simulator)
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#endif
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#if arch(ios)
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#endif
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#if FOO
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#else if BAR
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// expected-error@-1 {{unexpected 'if' keyword following '#else' conditional compilation directive; did you mean '#elseif'?}} {{1-9=#elseif}}
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#else
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#endif
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#if FOO
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#else
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if true {}
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#endif // OK
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// rdar://83017601 Make sure we don't crash
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#if canImport()
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// expected-error@-1 {{'canImport' requires a module name}}
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#endif
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