[5.7] Obtain match output elements without materializing the output.#498

milseman merged 1 commit intoswiftlang:swift/release/5.7swiftlang/swift-experimental-string-processing:swift/release/5.7from

natecook1000:5.7/fix-267natecook1000/swift-experimental-string-processing:5.7/fix-267Copy head branch name to clipboard