[SR-3417] #if in closure doesn't allow closure to be a single expression closure #46005
Description
| Previous ID | SR-3417 |
| Radar | None |
| Original Reporter | hughbe (JIRA User) |
| Type | Bug |
| Status | Resolved |
| Resolution | Done |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Compiler |
| Labels | Bug, Parser, TypeChecker |
| Assignee | maustinstar (JIRA) |
| Priority | Medium |
md5: 9e8c4f62db5afe1e6df957fc5c116a33
Issue Description:
The following code feels like it should work, but doesn't
public func _stdlib_pipe() -> (readEnd: CInt, writeEnd: CInt, error: CInt) {
var fds: [CInt] = [0, 0]
let ret = fds.withUnsafeMutableBufferPointer { unsafeFds -> CInt in
#if !os(Windows) || CYGWIN
pipe(unsafeFds.baseAddress)
#else
_pipe(unsafeFds.baseAddress, 0, 0)
#endif
}
return (readEnd: fds[0], writeEnd: fds[1], error: ret)
}Instead, you need to include an explicit return as the closure can no longer be a single expression closure.
public func _stdlib_pipe() -> (readEnd: CInt, writeEnd: CInt, error: CInt) {
var fds: [CInt] = [0, 0]
let ret = fds.withUnsafeMutableBufferPointer { unsafeFds -> CInt in
#if !os(Windows) || CYGWIN
return pipe(unsafeFds.baseAddress)
#else
return _pipe(unsafeFds.baseAddress, 0, 0)
#endif
}
return (readEnd: fds[0], writeEnd: fds[1], error: ret)
}