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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Collections open source project
//
// Copyright (c) 2023 - 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
//
//===----------------------------------------------------------------------===//
#if swift(>=5.8)
@available(macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4, *)
extension BigString {
public func _invariantCheck() {
#if COLLECTIONS_INTERNAL_CHECKS
_rope._invariantCheck()
let allowUndersize = _rope.isSingleton
var state = _CharacterRecognizer()
for chunk in _rope {
precondition(allowUndersize || !chunk.isUndersized, "Undersized chunk")
let (characters, prefix, suffix) = state.edgeCounts(consuming: chunk.string)
precondition(
chunk.prefixCount == prefix,
"Inconsistent position of first grapheme break in chunk")
precondition(
chunk.suffixCount == suffix,
"Inconsistent position of last grapheme break in chunk")
precondition(
chunk.characterCount == characters,
"Inconsistent character count in chunk")
}
#endif
}
}
#endif
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