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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2022 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
//
//===----------------------------------------------------------------------===//
import struct TSCBasic.SHA256
extension String {
/// generated for the byte string's contents.
///
/// This property uses the CryptoKit implementation of
/// Secure Hashing Algorithm 2 (SHA-2) hashing with a 256-bit digest, when available,
/// falling back on a native implementation in Swift provided by TSCBasic.
public var sha256Checksum: String {
SHA256().hash(self).hexadecimalRepresentation
}
/// Drops the given suffix from the string, if present.
public func spm_dropPrefix(_ prefix: String) -> String {
if self.hasPrefix(prefix) {
return String(self.dropFirst(prefix.count))
}
return self
}
public var isValidIdentifier: Bool {
guard !isEmpty else { return false }
return allSatisfy { $0.isLetter || $0.isNumber || $0 == "_" }
}
}
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