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// RUN: %target-swift-frontend -dump-ast %s | %FileCheck %s
func doSomething<T>(_ t: T) {}
// CHECK: func_decl{{.*}}"outerGeneric(t:x:)" "<T>" interface_type="<T> (t: T, x: AnyObject) -> ()"
func outerGeneric<T>(t: T, x: AnyObject) {
// Simple case -- closure captures outer generic parameter
// CHECK: closure_expr type="() -> ()" {{.*}} discriminator=0 nonisolated captures=(<generic> t<direct> type=T, type=τ_0_0) escaping single_expression
_ = { doSomething(t) }
// Special case -- closure does not capture outer generic parameters
// CHECK: closure_expr type="() -> ()" {{.*}} discriminator=1 nonisolated captures=(x<direct>) escaping single_expression
_ = { doSomething(x) }
// Special case -- closure captures outer generic parameter, but it does not
// appear as the type of any expression
// CHECK: closure_expr type="() -> ()" {{.*}} discriminator=2 nonisolated captures=(<generic> x<direct> type=T)
_ = { if x is T {} }
// Nested generic functions always capture outer generic parameters, even if
// they're not mentioned in the function body
// CHECK: func_decl{{.*}}"innerGeneric(u:)" "<U>" interface_type="<T, U> (u: U) -> ()" {{.*}} captures=(<generic> type=τ_1_0)
func innerGeneric<U>(u: U) {}
// Make sure we look through typealiases
typealias TT = (a: T, b: T)
// CHECK: func_decl{{.*}}"localFunction(tt:)" interface_type="<T> (tt: TT) -> ()" {{.*}} captures=(<generic> type=τ_0_0)
func localFunction(tt: TT) {}
// CHECK: closure_expr type="(TT) -> ()" {{.*}} captures=(<generic> type=T)
let _: (TT) -> () = { _ in }
}
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