swiftlang/swift
[SR-1557] Unused function-typed return values result in a hard error
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#44 166 ouverte le 18 mai 2016
bugcompilergood first issue
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Description
| Previous ID | SR-1557 |
| Radar | None |
| Original Reporter | H2CO3 (JIRA User) |
| Type | Bug |
OS X 10.10.5, swiftc version 2.1 (swiftlang-700.1.101.6 clang-700.1.76)
| Votes | 0 |
| Component/s | Compiler |
| Labels | Bug, StarterBug |
| Assignee | None |
| Priority | Medium |
md5: f02d43f7c7b9cce2527f9568acf6ac13
Issue Description:
If a function returns a function, and the return value of the former is unused, a compilation error occurs:
public func foo(x: Int) -> () -> Int {
return { x }
}
foo(42) // ignored return value errors out: "expression resolves to an unused function"
For consistency (and convenience of testing, where I found this problem), such unused return values should yield a warning only.