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// RUN: %target-run-simple-swift(-enable-experimental-feature Embedded -Xfrontend -throws-as-traps -parse-as-library -runtime-compatibility-version none -wmo -Xfrontend -disable-objc-interop) | %FileCheck %s
// REQUIRES: swift_in_compiler
// REQUIRES: executable_test
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx || OS=linux-gnu
public struct MyInterpolation : StringInterpolationProtocol {
public typealias StringLiteralType = StaticString
public init(literalCapacity: Int, interpolationCount: Int) {}
var literalCount = 0
var interpolationCount = 0
public mutating func appendLiteral(_ literal: StaticString) {
print("appendLiteral")
literalCount += 1
}
public mutating func appendInterpolation<T>(_ value: @autoclosure @escaping () -> T) {
print("appendInterpolation<T>")
interpolationCount += 1
}
}
public struct MyMessage : ExpressibleByStringInterpolation {
public typealias StringInterpolation = MyInterpolation
var interpolation: MyInterpolation
public init(stringInterpolation: MyInterpolation) {
self.interpolation = stringInterpolation
}
public init(stringLiteral value: StaticString) {
self.interpolation = MyInterpolation(literalCapacity: 0, interpolationCount: 0)
self.interpolation.appendLiteral(value)
}
}
public func print_interpolation(_ message: MyMessage) {
print(message.interpolation.literalCount)
print(message.interpolation.interpolationCount)
}
@main
struct Main {
static func main() {
print_interpolation("hello \(42) \(123) abc")
}
}
// CHECK: appendLiteral
// CHECK: appendInterpolation<T>
// CHECK: appendLiteral
// CHECK: appendInterpolation<T>
// CHECK: appendLiteral
// CHECK: 3
// CHECK: 2
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