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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2014-2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
/// An enum representing supported source file extensions.
public enum SupportedLanguageExtension: String {
/// Swift
case swift
/// C
case c
/// Objective C
case m
/// Objective-C++
case mm
/// C++
case cc
case cpp
case cxx
/// Assembly
case s
case S
/// Returns a set of valid swift extensions.
public static var swiftExtensions: Set<String> = {
SupportedLanguageExtension.stringSet(swift)
}()
/// Returns a set of valid c extensions.
public static var cExtensions: Set<String> = {
SupportedLanguageExtension.stringSet(c, m)
}()
/// Returns a set of valid cpp extensions.
public static var cppExtensions: Set<String> = {
SupportedLanguageExtension.stringSet(mm, cc, cpp, cxx)
}()
/// Returns a set of valid assembly file extensions.
public static var assemblyExtensions: Set<String> = {
SupportedLanguageExtension.stringSet(.s, .S)
}()
/// Returns a set of valid extensions in clang targets.
public static func clangTargetExtensions(toolsVersion: ToolsVersion) -> Set<String> {
var validExts = cExtensions.union(cppExtensions)
if toolsVersion >= .v5 {
validExts.formUnion(assemblyExtensions)
}
return validExts
}
/// Returns a set of all file extensions we support.
public static func validExtensions(toolsVersion: ToolsVersion) -> Set<String> {
return swiftExtensions.union(clangTargetExtensions(toolsVersion: toolsVersion))
}
/// Converts array of LanguageExtension into a string set representation.
///
/// - Parameters:
/// - extensions: Array of LanguageExtension to be converted to string set.
///
/// - Returns: Set of strings.
private static func stringSet(_ extensions: SupportedLanguageExtension...) -> Set<String> {
return Set(extensions.map({ $0.rawValue }))
}
}
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