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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import SKLogging
extension Dictionary {
/// Create a new dictionary from the given elements, assuming that they all have a unique value identified by `keyedBy`.
/// If two elements have the same key, log an error and choose the first value with that key.
public init(elements: some Sequence<Value>, keyedBy: KeyPath<Value, Key>) {
self = [:]
self.reserveCapacity(elements.underestimatedCount)
for element in elements {
let key = element[keyPath: keyedBy]
if let existingElement = self[key] {
logger.error(
"Found duplicate key \(String(describing: key)): \(String(describing: existingElement)) vs. \(String(describing: element))"
)
continue
}
self[key] = element
}
}
}
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