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// RUN: %target-typecheck-verify-swift -parse-as-library
let _ = 1 // expected-error{{global variable declaration does not bind any variables}}
func foo() {
let _ = 1 // OK
}
struct Foo {
let _ = 1 // expected-error{{property declaration does not bind any variables}}
var (_, _) = (1, 2) // expected-error{{property declaration does not bind any variables}}
func foo() {
let _ = 1 // OK
}
}
// <rdar://problem/19786845> Warn on "let" and "var" when no data is bound in a pattern
enum SimpleEnum { case Bar }
func testVarLetPattern(a : SimpleEnum) {
switch a {
case let .Bar: break // expected-warning {{'let' pattern has no effect; sub-pattern didn't bind any variables}} {{8-12=}}
}
switch a {
case let x: _ = x; break // Ok.
}
switch a {
case let _: break // expected-warning {{'let' pattern has no effect; sub-pattern didn't bind any variables}} {{8-12=}}
}
switch (a, 42) {
case let (_, x): _ = x; break // ok
}
// expected-warning @+1 {{'if' condition is always true}}
if case let _ = "str" {} // expected-warning {{'let' pattern has no effect; sub-pattern didn't bind any variables}} {{11-15=}}
}
// https://github.com/apple/swift/issues/53293
class C_53293 {
static var _: Int { 0 } //expected-error {{getter/setter can only be defined for a single variable}}
}
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