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// RUN: %target-typecheck-verify-swift
// Ambiguity when calling.
func ambiguous1( // expected-note 3 {{declared here}}
x: (Int) -> Int = { $0 },
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
z: (Int) -> Int = { $0 },
c: Int = 5
) {}
func testAmbiguous1() {
ambiguous1 { $0 } // expected-warning{{backward matching of the unlabeled trailing closure is deprecated; label the argument with 'z' to suppress this warning}}{{13-13=(z: }}{{20-20=)}}
ambiguous1() { $0 } // expected-warning{{backward matching of the unlabeled trailing closure is deprecated; label the argument with 'z' to suppress this warning}}{{14-15=z: }}{{22-22=)}}
ambiguous1(a: 3) { $0 } // expected-warning{{backward matching of the unlabeled trailing closure is deprecated; label the argument with 'z' to suppress this warning}}{{18-19=, z: }}{{26-26=)}}
// No warning; this is matching the last parameter.
ambiguous1(b: 3) { $0 }
}
// Ambiguity with two unlabeled arguments.
func ambiguous2( // expected-note{{declared here}}
_: (Int) -> Int = { $0 },
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
_: (Int) -> Int = { $0 },
x: Int = 5
) {}
func testAmbiguous2() {
ambiguous2 { $0 } // expected-warning{{backward matching of the unlabeled trailing closure is deprecated; label the argument with '_' to suppress this warning}}{{15-15=(}}{{22-22=)}}
}
// Ambiguity with one unlabeled argument.
func ambiguous3( // expected-note{{declared here}}
x: (Int) -> Int = { $0 },
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
_: (Int) -> Int = { $0 },
c: Int = 5
) {}
func testAmbiguous3() {
ambiguous3 { $0 } // expected-warning{{backward matching of the unlabeled trailing closure is deprecated; label the argument with '_' to suppress this warning}}{{13-13=(}}{{20-20=)}}
}
// Not ambiguous because of an arity mismatch that would lead to different
// type-checks.
func notAmbiguous1(
x: (Int, Int) -> Int = { $0 + $1 },
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
_: (Int) -> Int = { $0 },
c: Int = 5
) { }
func testNotAmbiguous1() {
notAmbiguous1 { $0 / $1 }
}
// Not ambiguous because of a missing default argument.
func notAmbiguous2(
x: (Int) -> Int,
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
_: (Int) -> Int = { $0 },
c: Int = 5
) { }
func testNotAmbiguous2() {
notAmbiguous2 { $0 }
}
// Not ambiguous because of a missing default argument.
func notAmbiguous3(
x: (Int) -> Int = { $0 },
a: Int = 5,
y: (Int) -> Int = { $0 },
b: Int = 5,
_: (Int) -> Int ,
c: Int = 5
) { }
func testNotAmbiguous3() {
notAmbiguous3 { $0 }
}
// Ambiguous subscript
struct S {
subscript( // expected-note {{'subscript(a:_:_:)' declared here}}
a a: Int,
fn1: (() -> Void)? = nil,
fn2: (() -> Void)? = nil) -> Bool {
get { return true }
}
subscript( // expected-note {{'subscript(b:_:fn2:)' declared here}}
b b: Int,
fn1: (() -> Void)? = nil,
fn2 fn2: (() -> Void)? = nil) -> Bool {
get { return true }
}
static func foo( // expected-note {{'foo(c:fn1:fn2:)' declared here}}
c: Int,
fn1: (() -> Void)? = nil,
fn2: (() -> Void)? = nil) -> S {
return S()
}
}
func test_ambiguous_subscript_unresolved_member(s: S) {
_ = s[a: 42] {} // expected-warning {{backward matching of the unlabeled trailing closure is deprecated; label the argument with '_' to suppress this warning}} {{14-15=, }} {{18-18=]}}
_ = s[b: 42] {} // expected-warning {{backward matching of the unlabeled trailing closure is deprecated; label the argument with 'fn2' to suppress this warning}} {{14-15=, fn2: }} {{18-18=]}}
let _: S = .foo(c: 42) {} // expected-warning {{backward matching of the unlabeled trailing closure is deprecated; label the argument with 'fn2' to suppress this warning}} {{24-25=, fn2: }} {{28-28=)}}
}
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