出来る。
$ xcrun --toolchain org.swift.42120181030a swift -frontend -repl -sdk `xcrun --show-sdk-path --sdk macosx` *** You are running Swift's integrated REPL, *** *** intended for compiler and stdlib *** *** development and testing purposes only. *** *** The full REPL is built as part of LLDB. *** *** Type ':help' for assistance. *** (swift) import SwiftSyntax (swift) :print_module SwiftSyntax import Darwin import Foundation struct AttributeListSyntaxIterator : IteratorProtocol { typealias Element = AttributeSyntax let collection: <null> var index: <null> init(collection: AttributeListSyntax) mutating func next() -> AttributeListSyntaxIterator.Element? } … extension ValueBindingPatternSyntax { init(_ build: (inout ValueBindingPatternSyntaxBuilder) -> Void) } (swift)