Hi,
If I have the *same* extension in two *different* modules, ModuleA and
ModuleB, and ModuleC uses both modules, but in *seperate* files, then there
is still ambiguity about which extension to call:
ModuleA
A.swift
public protocol P {
func m() -> String
}
extension Int: P {
public func m() -> String { return "AP.m" }
}
ModuleB
B.swift
public protocol P {
func m() -> String
}
extension Int: P {
public func m() -> String { return "BP.m" }
}
ModuleC
A.swift
import ModuleA
func am(_ i: Int) -> String { return i.m() }
B.swift
import ModuleB
func bm(_ i: Int) -> String { return i.m() }
main.swift
let i = 0
print(am(i))
print(bm(i))
Gives the following errors when built:
sunzero-ln:ModuleC lov080$ swift build
Fetching /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleA
Fetching /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleB
Cloning /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleA
Resolving /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleA at 1.0.0
Cloning /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleB
Resolving /Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleB at 1.0.0
Compile Swift Module 'ModuleB' (1 sources)
Compile Swift Module 'ModuleA' (1 sources)
Compile Swift Module 'ModuleC' (3 sources)
/Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleC/Sources/B.swift:3:38: error: ambiguous use of 'm()'
func bm(_ i: Int) -> String { return i.m() }
^
ModuleA.Int:2:17: note: found this candidate
public func m() -> String
^
ModuleB.Int:2:17: note: found this candidate
public func m() -> String
^
/Users/lov080/Google Drive/Swift/Examples/Example Module
Clashes/ModuleC/Sources/A.swift:3:38: error: ambiguous use of 'm()'
func am(_ i: Int) -> String { return i.m() }
^
ModuleA.Int:2:17: note: found this candidate
public func m() -> String
^
ModuleB.Int:2:17: note: found this candidate
public func m() -> String
^
<unknown>:0: error: build had 1 command failures
error: exit(1): /Applications/Xcode.app/Contents/Developer/Toolchains/
XcodeDefault.xctoolchain/usr/bin/swift-build-tool -f /Users/lov080/Google\
Drive/Swift/Examples/Example\ Module\ Clashes/ModuleC/.build/debug.yaml
Is this the expected behaviour or a bug?
Thanks in advance for any help,
-- Howard.
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