Mihaela Mihaljevic
6fa49b7ffc
swiftformat --lint failed on these pre-existing files and the pre-push hook checks the whole tree, blocking every push until they conform. The wrapped if bodies pushed YAMLTestSuiteGapsTests over the 400-line lint limit, so its private JSONStreamScanner helper moves to its own support file.
67 lines
1.9 KiB
Swift
67 lines
1.9 KiB
Swift
/// Minimal JSON value-stream scanner used by the yaml-test-suite gap
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/// tests to split concatenated in-JSON expectation documents.
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struct JSONStreamScanner {
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let text: String
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var out: [String] = []
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var depth = 0
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var inString = false
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var escaped = false
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var start: String.Index?
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mutating func scan() -> [String] {
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var index = text.startIndex
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while index < text.endIndex {
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if inString {
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stepInString(text[index])
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} else {
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stepStructural(text[index], at: index)
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}
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index = text.index(after: index)
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}
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if let begin = start {
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out.append(String(text[begin...]))
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}
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return out.map { $0.trimmingCharacters(in: .whitespacesAndNewlines) }.filter { !$0.isEmpty }
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}
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private mutating func stepInString(_ character: Character) {
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if escaped {
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escaped = false
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} else if character == "\\" {
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escaped = true
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} else if character == "\"" {
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inString = false
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}
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}
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private mutating func stepStructural(_ character: Character, at index: String.Index) {
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switch character {
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case "\"":
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if start == nil {
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start = index
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}
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inString = true
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case "{", "[":
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if start == nil {
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start = index
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}
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depth += 1
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case "}", "]":
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depth -= 1
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if depth == 0, let begin = start {
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out.append(String(text[begin ... index]))
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start = nil
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}
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case " ", "\n", "\r", "\t":
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if depth == 0, let begin = start {
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out.append(String(text[begin ..< index]))
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start = nil
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}
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default:
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if depth == 0, start == nil {
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start = index
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}
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}
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}
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}
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