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// RUN: %target-typecheck-verify-swift
// RUN: %target-typecheck-verify-swift -I %t
// This test verifies that `buildBlock` is type-checked together with enclosing context,
// which means that it's not captured into separate variable but rather used directly and
// contextual information can impact overload resolution.
protocol ActionIdentifier: Hashable {
}
struct ActionLookup<Identifier: ActionIdentifier> {
init(_: Identifier...) {}
}
@resultBuilder
enum ActionLookupBuilder<Identifier: ActionIdentifier> { // expected-note 3{{'Identifier' previously declared here}}
static func buildBlock<Identifier: ActionIdentifier>(_ components: [ActionLookup<Identifier>]...) -> ActionLookup<Identifier> { // expected-warning {{generic parameter 'Identifier' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode}}
fatalError()
}
static func buildBlock<Identifier: ActionIdentifier>(_ components: [ActionLookup<Identifier>]...) -> [ActionLookup<Identifier>] { // expected-warning {{generic parameter 'Identifier' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode}}
[]
}
static func buildExpression(_ expression: ActionLookup<Identifier>) -> [ActionLookup<Identifier>] {
[]
}
static func buildOptional<Identifier: ActionIdentifier>(_ component: [ActionLookup<Identifier>]?) -> [ActionLookup<Identifier>] { // expected-warning {{generic parameter 'Identifier' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode}}
[]
}
}
enum ActionType: String, ActionIdentifier, CaseIterable {
case download
case upload
public typealias ActionTypeLookup = ActionLookup<Self>
public typealias ActionTypeLookupBuilder = ActionLookupBuilder<Self>
@ActionTypeLookupBuilder
static var test: ActionTypeLookup {
ActionTypeLookup(
.download
)
if true { // If condition is needed to make sure that `buildOptional` affects `buildBlock` resolution.
ActionTypeLookup(
.upload
)
}
}
}
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