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Tokenizer.swift
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Tokenizer.swift
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public import Collections
@freestanding(codeItem) private macro go(emit: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token...) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token..., to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token..., reconsume: Character, in: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token..., clearTemp: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token..., emitTempAndReconsume: Character, in: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emit: Token..., emitTempAndEmit: Token) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createTemp: Character, emit: Token..., to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendTemp: Character, emit: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createComment: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createComment: String, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendComment: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendComment: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendComment: String, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., clearComment: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitComment: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createStartTag: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createEndTag: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createEndTag: Character, appendTemp: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendTagName: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendTagName: Character, appendTemp: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createAttr: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendAttrName: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendAttrValue: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitTag: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitSelfClosingTag: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., createDOCTYPE: Character, to: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendDOCTYPEName: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendPublicID: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., clearPublicID: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., appendSystemID: Character) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., clearSystemID: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., forceQuirks: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitDOCTYPE: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitForceQuirksDOCTYPE: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro go(error: ParseError..., emitNewForceQuirksDOCTYPE: State) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro goEmitCommentAndEOF() = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro goEmitDOCTYPEAndEOF() = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro goEmitForceQuirksDOCTYPEAndEOF() = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro goEmitNewForceQuirksDOCTYPEAndEOF() = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
@freestanding(codeItem) private macro goConsumeCharRef(inAttr: Bool) = #externalMacro(module: "TokenizerMacros", type: "GoMacro")
public struct Tokenizer<Sink: TokenSink>: ~Copyable {
public var sink: Sink
package var state: State
private var reconsumeChar: Optional<Character>
private var tempBuffer: String
private var currentComment: String
private var currentTagName: String
private var currentTagKind: TagKind
private var currentAttrName: String
private var currentAttrValue: String
private var currentAttrs: [String: String]
private var lastStartTagName: Optional<String>
private var currentDOCTYPE: DOCTYPE
private var charRefTokenizer: Optional<CharRefTokenizer>
public init(sink: consuming Sink) {
self.sink = sink
self.state = .data
self.reconsumeChar = nil
self.tempBuffer = ""
self.currentComment = ""
self.currentTagName = ""
self.currentTagKind = .start
self.currentAttrName = ""
self.currentAttrValue = ""
self.currentAttrs = [:]
self.lastStartTagName = nil
self.currentDOCTYPE = .init()
self.charRefTokenizer = nil
}
public mutating func tokenize(_ input: inout Deque<Character>) {
loop: repeat {
switch self.step(&input) {
case .continue: break
case .suspend: break loop
}
} while true
}
// swift-format-ignore
private mutating func step(_ input: inout Deque<Character>) -> ProcessResult {
if var charRefTokenizer {
if let scalars = charRefTokenizer.tokenize(tokenizer: &self, input: &input) {
self.processCharRef(scalars)
}
self.charRefTokenizer = nil
}
switch self.state {
case .data: repeat {
switch self.getChar(from: &input) {
case "&": #goConsumeCharRef(inAttr: false)
case "<": #go(to: .tagOpen)
case "\0": #go(error: .unexpectedNull, emit: "\0")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .rcdata: repeat {
switch self.getChar(from: &input) {
case "&": #goConsumeCharRef(inAttr: false)
case "<": #go(to: .rcdataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .rawtext: repeat {
switch self.getChar(from: &input) {
case "<": #go(to: .rawtextLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .scriptData: repeat {
switch self.getChar(from: &input) {
case "<": #go(to: .scriptDataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .plaintext: repeat {
switch self.getChar(from: &input) {
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .tagOpen: repeat {
switch self.getChar(from: &input) {
case "!": #go(to: .markupDeclarationOpen)
case "/": #go(to: .endTagOpen)
case "?": #go(error: .unexpectedQuestionMark, createComment: "?", to: .bogusComment)
case nil: #go(error: .eofBeforeTagName, emit: "<", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createStartTag: cl, to: .tagName)
case nil: #go(error: .invalidFirstChar, emit: "<", reconsume: c, in: .data)
}
}
} while true
case .endTagOpen: repeat {
switch self.getChar(from: &input) {
case ">": #go(error: .missingEndTagName, to: .data)
case "\0": #go(error: .invalidFirstChar, .unexpectedNull, createComment: "\u{FFFD}", to: .bogusComment)
case nil: #go(error: .eofBeforeTagName, emit: "<", "/", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createEndTag: cl, to: .tagName)
case nil: #go(error: .invalidFirstChar, createComment: c, to: .bogusComment)
}
}
} while true
case .tagName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case "\0": #go(error: .unexpectedNull, appendTagName: "\u{FFFD}")
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(appendTagName: lowerASCII(c))
}
} while true
case .rcdataLessThanSign: repeat {
switch self.getChar(from: &input) {
case "/": #go(clearTemp: .rcdataEndTagOpen)
case nil: #go(emit: "<", .eof)
case let c?: #go(emit: "<", reconsume: c, in: .rcdata)
}
} while true
case .rcdataEndTagOpen: repeat {
switch self.getChar(from: &input) {
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createEndTag: cl, appendTemp: c, to: .rcdataEndTagName)
case nil: #go(emit: "<", "/", reconsume: c, in: .rcdata)
}
case nil: #go(emit: "<", "/", .eof)
}
} while true
case .rcdataEndTagName: repeat {
let c = self.getChar(from: &input)
if self.currentTagKind == .end && self.currentTagName == self.lastStartTagName {
switch c {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case _: break
}
}
switch c {
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTagName: cl, appendTemp: c)
case nil: #go(emit: "<", "/", emitTempAndReconsume: c, in: .rcdata)
}
case nil: #go(emit: "<", "/", emitTempAndEmit: .eof)
}
} while true
case .rawtextLessThanSign: repeat {
switch self.getChar(from: &input) {
case "/": #go(clearTemp: .rawtextEndTagOpen)
case "<": #go(emit: "<", to: .rawtextLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", "\u{FFFD}", to: .rawtext)
case nil: #go(emit: "<", .eof)
case let c?: #go(emit: "<", .char(c), to: .rawtext)
}
} while true
case .rawtextEndTagOpen: repeat {
switch self.getChar(from: &input) {
case "<": #go(emit: "<", "/", to: .rawtextLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", "/", "\u{FFFD}", to: .rawtext)
case nil: #go(emit: "<", "/", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createEndTag: cl, appendTemp: c, to: .rawtextEndTagName)
case nil: #go(emit: "<", "/", .char(c), to: .rawtext)
}
}
} while true
case .rawtextEndTagName: repeat {
let c = self.getChar(from: &input)
if self.currentTagKind == .end && self.currentTagName == self.lastStartTagName {
switch c {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case _: break
}
}
switch c {
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTagName: cl, appendTemp: c)
case nil: #go(emit: "<", "/", emitTempAndReconsume: c, in: .rawtext)
}
case nil: #go(emit: "<", "/", emitTempAndEmit: .eof)
}
} while true
case .scriptDataLessThanSign: repeat {
switch self.getChar(from: &input) {
case "/": #go(clearTemp: .scriptDataEndTagOpen)
case "!": #go(emit: "<", "!", to: .scriptDataEscapeStart)
case "<": #go(emit: "<", to: .scriptDataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", "\u{FFFD}", to: .scriptData)
case nil: #go(emit: "<", .eof)
case let c?: #go(emit: "<", .char(c), to: .scriptData)
}
} while true
case .scriptDataEndTagOpen: repeat {
switch self.getChar(from: &input) {
case "<": #go(emit: "<", "/", to: .scriptDataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", ",", "\u{FFFD}", to: .scriptData)
case nil: #go(emit: "<", "/", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createEndTag: cl, appendTemp: c, to: .scriptDataEndTagName)
case nil: #go(emit: "<", "/", .char(c), to: .scriptData)
}
}
} while true
case .scriptDataEndTagName: repeat {
let c = self.getChar(from: &input)
if self.currentTagKind == .end && self.currentTagName == self.lastStartTagName {
switch c {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case _: break
}
}
switch c {
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTagName: cl, appendTemp: c)
case nil: #go(emit: "<", "/", emitTempAndReconsume: c, in: .scriptData)
}
case nil: #go(emit: "<", "/", emitTempAndEmit: .eof)
}
} while true
case .scriptDataEscapeStart: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataEscapeStartDash)
case "<": #go(to: .scriptDataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .scriptDataEscapeStartDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataEscapedDashDash)
case "<": #go(to: .scriptDataLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .scriptDataEscaped: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataEscapedDash)
case "<": #go(to: .scriptDataEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .scriptDataEscapedDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataEscapedDashDash)
case "<": #go(to: .scriptDataEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataEscaped)
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: .char(c), to: .scriptDataEscaped)
}
} while true
case .scriptDataEscapedDashDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-")
case "<": #go(to: .scriptDataEscapedLessThanSign)
case ">": #go(emit: ">", to: .scriptData)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataEscaped)
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: .char(c), to: .scriptDataEscaped)
}
} while true
case .scriptDataEscapedLessThanSign: repeat {
switch self.getChar(from: &input) {
case "/": #go(clearTemp: .scriptDataEscapedEndTagOpen)
case "-": #go(emit: "<", "-", to: .scriptDataEscapedDash)
case "<": #go(emit: "<", to: .scriptDataEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", "\u{FFFD}", to: .scriptDataEscaped)
case nil: #go(error: .eofInScriptComment, emit: "<", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createTemp: cl, emit: "<", .char(c), to: .scriptDataDoubleEscapeStart)
case nil: #go(emit: "<", .char(c), to: .scriptDataEscaped)
}
}
} while true
case .scriptDataEscapedEndTagOpen: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "<", "/", "-", to: .scriptDataEscapedDash)
case "<": #go(emit: "<", "/", to: .scriptDataEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "<", "/", "\u{FFFD}", to: .scriptDataEscaped)
case nil: #go(error: .eofInScriptComment, emit: "<", "/", .eof)
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(createEndTag: cl, appendTemp: c, to: .scriptDataEscapedEndTagName)
case nil: #go(emit: "<", "/", .char(c), to: .scriptDataEscaped)
}
}
} while true
case .scriptDataEscapedEndTagName: repeat {
let c = self.getChar(from: &input)
if self.currentTagKind == .end && self.currentTagName == self.lastStartTagName {
switch c {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case _: break
}
}
switch c {
case let c?:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTagName: cl, appendTemp: c)
case nil: #go(emit: "<", "/", emitTempAndReconsume: c, in: .scriptDataEscaped)
}
case nil: #go(emit: "<", "/", emitTempAndEmit: .eof)
}
} while true
case .scriptDataDoubleEscapeStart: repeat {
guard let c = self.getChar(from: &input) else { #go(error: .eofInScriptComment, emit: .eof) }
switch c {
case "\t", "\n", "\u{0C}", " ", "/", ">":
if self.tempBuffer == "script" {
#go(emit: .char(c), to: .scriptDataDoubleEscaped)
} else {
#go(emit: .char(c), to: .scriptDataEscaped)
}
case "-": #go(emit: "-", to: .scriptDataEscapedDash)
case "<": #go(to: .scriptDataEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataEscaped)
case let c:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTemp: cl, emit: c)
case nil: #go(emit: .char(c), to: .scriptDataEscaped)
}
}
} while true
case .scriptDataDoubleEscaped: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataDoubleEscapedDash)
case "<": #go(emit: "<", to: .scriptDataDoubleEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}")
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .scriptDataDoubleEscapedDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-", to: .scriptDataDoubleEscapedDashDash)
case "<": #go(emit: "<", to: .scriptDataDoubleEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataDoubleEscaped)
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: .char(c), to: .scriptDataDoubleEscaped)
}
} while true
case .scriptDataDoubleEscapedDashDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(emit: "-")
case "<": #go(emit: "<", to: .scriptDataDoubleEscapedLessThanSign)
case ">": #go(emit: ">", to: .scriptData)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataDoubleEscaped)
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: .char(c), to: .scriptDataDoubleEscaped)
}
} while true
case .scriptDataDoubleEscapedLessThanSign: repeat {
switch self.getChar(from: &input) {
case "/": #go(emit: "/", clearTemp: .scriptDataDoubleEscapeEnd)
case "-": #go(emit: "-", to: .scriptDataDoubleEscapedDash)
case "<": #go(emit: "<", to: .scriptDataDoubleEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataDoubleEscaped)
case nil: #go(error: .eofInScriptComment, emit: .eof)
case let c?: #go(emit: .char(c), to: .scriptDataDoubleEscaped)
}
} while true
case .scriptDataDoubleEscapeEnd: repeat {
guard let c = self.getChar(from: &input) else { #go(error: .eofInScriptComment, emit: .eof) }
switch c {
case "\t", "\n", "\u{0C}", " ", "/", ">":
if self.tempBuffer == "script" {
#go(emit: .char(c), to: .scriptDataEscaped)
} else {
#go(emit: .char(c), to: .scriptDataDoubleEscaped)
}
case "-": #go(emit: "-", to: .scriptDataDoubleEscapedDash)
case "<": #go(emit: "<", to: .scriptDataDoubleEscapedLessThanSign)
case "\0": #go(error: .unexpectedNull, emit: "\u{FFFD}", to: .scriptDataDoubleEscaped)
case let c:
switch lowerASCIIOrNil(c) {
case let cl?: #go(appendTemp: cl, emit: c)
case nil: #go(emit: .char(c), to: .scriptDataDoubleEscaped)
}
}
} while true
case .beforeAttributeName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case "=": #go(error: .unexpectedEqualsSign, createAttr: "=", to: .attributeName)
case "\0": #go(error: .unexpectedNull, createAttr: "\u{FFFD}", to: .attributeName)
case "\"": #go(error: .unexpectedCharInAttrName, createAttr: "\"", to: .attributeName)
case "'": #go(error: .unexpectedCharInAttrName, createAttr: "'", to: .attributeName)
case "<": #go(error: .unexpectedCharInAttrName, createAttr: "<", to: .attributeName)
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(createAttr: lowerASCII(c), to: .attributeName)
}
} while true
case .attributeName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .afterAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case "=": #go(to: .beforeAttributeValue)
case "\0": #go(error: .unexpectedNull, appendAttrName: "\u{FFFD}")
case "\"": #go(error: .unexpectedCharInAttrName, appendAttrName: "\"")
case "'": #go(error: .unexpectedCharInAttrName, appendAttrName: "'")
case "<": #go(error: .unexpectedCharInAttrName, appendAttrName: "<")
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(appendAttrName: lowerASCII(c))
}
} while true
case .afterAttributeName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case "=": #go(to: .beforeAttributeValue)
case "\0": #go(error: .unexpectedNull, createAttr: "\u{FFFD}", to: .attributeName)
case "\"": #go(error: .unexpectedCharInAttrName, createAttr: "\"", to: .attributeName)
case "'": #go(error: .unexpectedCharInAttrName, createAttr: "'", to: .attributeName)
case "<": #go(error: .unexpectedCharInAttrName, createAttr: "<", to: .attributeName)
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(createAttr: lowerASCII(c), to: .attributeName)
}
} while true
case .beforeAttributeValue: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "\"": #go(to: .attributeValueDoubleQuoted)
case "'": #go(to: .attributeValueSingleQuoted)
case ">": #go(error: .missingAttrValue, emitTag: .data)
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(reconsume: c, in: .attributeValueUnquoted)
}
} while true
case .attributeValueDoubleQuoted: repeat {
switch self.getChar(from: &input) {
case "\"": #go(to: .afterAttributeValueQuoted)
case "&": #goConsumeCharRef(inAttr: true)
case "\0": #go(error: .unexpectedNull, appendAttrValue: "\u{FFFD}")
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(appendAttrValue: c)
}
} while true
case .attributeValueSingleQuoted: repeat {
switch self.getChar(from: &input) {
case "'": #go(to: .afterAttributeValueQuoted)
case "&": #goConsumeCharRef(inAttr: true)
case "\0": #go(error: .unexpectedNull, appendAttrValue: "\u{FFFD}")
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(appendAttrValue: c)
}
} while true
case .attributeValueUnquoted: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "&": #goConsumeCharRef(inAttr: true)
case ">": #go(emitTag: .data)
case "\0": #go(error: .unexpectedNull, appendAttrValue: "\u{FFFD}")
case nil: #go(error: .eofInTag, emit: .eof)
case "\"": #go(error: .unexpectedCharInUnquotedAttrValue, appendAttrValue: "\"")
case "'": #go(error: .unexpectedCharInUnquotedAttrValue, appendAttrValue: "'")
case "<": #go(error: .unexpectedCharInUnquotedAttrValue, appendAttrValue: "<")
case "=": #go(error: .unexpectedCharInUnquotedAttrValue, appendAttrValue: "=")
case "`": #go(error: .unexpectedCharInUnquotedAttrValue, appendAttrValue: "`")
case let c?: #go(appendAttrValue: c)
}
} while true
case .afterAttributeValueQuoted: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeAttributeName)
case "/": #go(to: .selfClosingStartTag)
case ">": #go(emitTag: .data)
case "=": #go(error: .missingSpaceBetweenAttrs, .unexpectedEqualsSign, createAttr: "=", to: .attributeName)
case "\0": #go(error: .missingSpaceBetweenAttrs, .unexpectedNull, createAttr: "\u{FFFD}", to: .attributeName)
case "\"": #go(error: .missingSpaceBetweenAttrs, .unexpectedCharInAttrName, createAttr: "\"", to: .attributeName)
case "'": #go(error: .missingSpaceBetweenAttrs, .unexpectedCharInAttrName, createAttr: "'", to: .attributeName)
case "<": #go(error: .missingSpaceBetweenAttrs, .unexpectedCharInAttrName, createAttr: "<", to: .attributeName)
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(error: .missingSpaceBetweenAttrs, createAttr: lowerASCII(c), to: .attributeName)
}
} while true
case .selfClosingStartTag: repeat {
switch self.getChar(from: &input) {
case ">": #go(emitSelfClosingTag: .data)
case "\t", "\n", "\u{0C}", " ": #go(error: .unexpectedSolidus, to: .beforeAttributeName)
case "/": #go(error: .unexpectedSolidus, to: .selfClosingStartTag)
case "=": #go(error: .unexpectedSolidus, .unexpectedEqualsSign, createAttr: "=", to: .attributeName)
case "\0": #go(error: .unexpectedSolidus, .unexpectedNull, createAttr: "\u{FFFD}", to: .attributeName)
case "\"": #go(error: .unexpectedSolidus, .unexpectedCharInAttrName, createAttr: "\"", to: .attributeName)
case "'": #go(error: .unexpectedSolidus, .unexpectedCharInAttrName, createAttr: "'", to: .attributeName)
case "<": #go(error: .unexpectedSolidus, .unexpectedCharInAttrName, createAttr: "<", to: .attributeName)
case nil: #go(error: .eofInTag, emit: .eof)
case let c?: #go(error: .unexpectedSolidus, createAttr: lowerASCII(c), to: .attributeName)
}
} while true
case .bogusComment: repeat {
switch self.getChar(from: &input) {
case ">": #go(emitComment: .data)
case "\0": #go(error: .unexpectedNull, appendComment: "\u{FFFD}")
case nil: #goEmitCommentAndEOF
case let c?: #go(appendComment: c)
}
} while true
case .markupDeclarationOpen: repeat {
if self.startsExact(&input, with: "--") == true {
#go(clearComment: .commentStart)
} else if self.starts(&input, with: "doctype") == true {
#go(to: .doctype)
} else if self.startsExact(&input, with: "[CDATA[") == true {
if false {
// TODO: If there is an adjusted current node and it is not an element in the HTML namespace, then switch to the CDATA section state.
#go(to: .cdataSection)
} else {
#go(error: .cdataInHTML, createComment: "[CDATA[", to: .bogusComment)
}
} else {
#go(error: .incorrectlyOpenedComment, clearComment: .bogusComment)
}
} while true
case .commentStart: repeat {
switch self.getChar(from: &input) {
case "-": #go(to: .commentStartDash)
case ">": #go(error: .abruptClosingComment, emitComment: .data)
case "<": #go(appendComment: "<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: c, to: .comment)
}
} while true
case .commentStartDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(to: .commentEnd)
case ">": #go(error: .abruptClosingComment, emitComment: .data)
case "<": #go(appendComment: "-<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "-\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: "-\(c)", to: .comment)
}
} while true
case .comment: repeat {
switch self.getChar(from: &input) {
case "<": #go(appendComment: "<", to: .commentLessThanSign)
case "-": #go(to: .commentEndDash)
case "\0": #go(error: .unexpectedNull, appendComment: "\u{FFFD}")
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: c)
}
} while true
case .commentLessThanSign: repeat {
switch self.getChar(from: &input) {
case "!": #go(appendComment: "!", to: .commentLessThanSignBang)
case "<": #go(appendComment: "<")
case "-": #go(to: .commentEndDash)
case "\0": #go(error: .unexpectedNull, appendComment: "\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: c, to: .comment)
}
} while true
case .commentLessThanSignBang: repeat {
switch self.getChar(from: &input) {
case "-": #go(to: .commentLessThanSignBangDash)
case "<": #go(appendComment: "<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: c, to: .comment)
}
} while true
case .commentLessThanSignBangDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(to: .commentLessThanSignBangDashDash)
case "<": #go(appendComment: "-<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "-\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: "-\(c)", to: .comment)
}
} while true
case .commentLessThanSignBangDashDash: repeat {
switch self.getChar(from: &input) {
case ">": #go(emitComment: .data)
case "!": #go(error: .nestedComment, to: .commentEndBang)
case "-": #go(error: .nestedComment, appendComment: "-")
case "<": #go(error: .nestedComment, appendComment: "--<", to: .commentLessThanSign)
case "\0": #go(error: .nestedComment, .unexpectedNull, appendComment: "--\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(error: .nestedComment, appendComment: "--\(c)", to: .comment)
}
} while true
case .commentEndDash: repeat {
switch self.getChar(from: &input) {
case "-": #go(to: .commentEnd)
case "<": #go(appendComment: "-<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "-\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: "-\(c)", to: .comment)
}
} while true
case .commentEnd: repeat {
switch self.getChar(from: &input) {
case ">": #go(emitComment: .data)
case "!": #go(to: .commentEndBang)
case "-": #go(appendComment: "-")
case "<": #go(appendComment: "--<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "--\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: "--\(c)", to: .comment)
}
} while true
case .commentEndBang: repeat {
switch self.getChar(from: &input) {
case "-": #go(appendComment: "--!", to: .commentEndDash)
case ">": #go(error: .incorrectlyClosedComment, emitComment: .data)
case "<": #go(appendComment: "--!<", to: .commentLessThanSign)
case "\0": #go(error: .unexpectedNull, appendComment: "--!\u{FFFD}", to: .comment)
case nil: self.emitError(.eofInComment); #goEmitCommentAndEOF
case let c?: #go(appendComment: "--!\(c)", to: .comment)
}
} while true
case .doctype: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeDOCTYPEName)
case ">": #go(error: .missingDOCTYPEName, emitNewForceQuirksDOCTYPE: .data)
case "\0": #go(error: .missingSpaceBeforeDOCTYPEName, .unexpectedNull, createDOCTYPE: "\u{FFFD}", to: .doctypeName)
case nil: self.emitError(.eofInDOCTYPE); #goEmitNewForceQuirksDOCTYPEAndEOF
case let c?: #go(error: .missingSpaceBeforeDOCTYPEName, createDOCTYPE: lowerASCII(c), to: .doctypeName)
}
} while true
case .beforeDOCTYPEName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "\0": #go(error: .unexpectedNull, createDOCTYPE: "\u{FFFD}", to: .doctypeName)
case ">": #go(error: .missingDOCTYPEName, emitNewForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitNewForceQuirksDOCTYPEAndEOF
case let c?: #go(createDOCTYPE: lowerASCII(c), to: .doctypeName)
}
} while true
case .doctypeName: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .afterDOCTYPEName)
case ">": #go(emitDOCTYPE: .data)
case "\0": #go(error: .unexpectedNull, appendDOCTYPEName: "\u{FFFD}")
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case let c?: #go(appendDOCTYPEName: lowerASCII(c))
}
} while true
case .afterDOCTYPEName: repeat {
if self.starts(&input, with: "public") == true {
#go(to: .afterDOCTYPEPublicKeyword)
} else if self.starts(&input, with: "system") == true {
#go(to: .afterDOCTYPESystemKeyword)
} else {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case ">": #go(emitDOCTYPE: .data)
case "\0": #go(error: .invalidCharSequence, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case _: #go(error: .invalidCharSequence, forceQuirks: .bogusDOCTYPE)
}
}
} while true
case .afterDOCTYPEPublicKeyword: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeDOCTYPEPublicID)
case "\"": #go(error: .missingSpaceAfterDOCTYPEPublicKeyword, clearPublicID: .doctypePublicIDDoubleQuoted)
case "'": #go(error: .missingSpaceAfterDOCTYPEPublicKeyword, clearPublicID: .doctypePublicIDSingleQuoted)
case ">": #go(error: .missingDOCTYPEPublicID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPEPublicID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _: #go(error: .missingQuoteBeforeDOCTYPEPublicID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .beforeDOCTYPEPublicID: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "\"": #go(clearPublicID: .doctypePublicIDDoubleQuoted)
case "'": #go(clearPublicID: .doctypePublicIDSingleQuoted)
case ">": #go(error: .missingDOCTYPEPublicID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPEPublicID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _: #go(error: .missingQuoteBeforeDOCTYPEPublicID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .doctypePublicIDDoubleQuoted: repeat {
switch self.getChar(from: &input) {
case "\"": #go(to: .afterDOCTYPEPublicID)
case ">": #go(error: .abruptDOCTYPEPublicID, emitForceQuirksDOCTYPE: .data)
case "\0": #go(error: .unexpectedNull, appendPublicID: "\u{FFFD}")
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case let c?: #go(appendPublicID: c)
}
} while true
case .doctypePublicIDSingleQuoted: repeat {
switch self.getChar(from: &input) {
case "'": #go(to: .afterDOCTYPEPublicID)
case ">": #go(error: .abruptDOCTYPEPublicID, emitForceQuirksDOCTYPE: .data)
case "\0": #go(error: .unexpectedNull, appendPublicID: "\u{FFFD}")
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case let c?: #go(appendPublicID: c)
}
} while true
case .afterDOCTYPEPublicID: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .betweenDOCTYPEPublicAndSystemIDs)
case ">": #go(emitDOCTYPE: .data)
case "\"": #go(error: .missingSpaceBetweenDOCTYPEIDs, clearSystemID: .doctypeSystemIDDoubleQuoted)
case "'": #go(error: .missingSpaceBetweenDOCTYPEIDs, clearSystemID: .doctypeSystemIDSingleQuoted)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPESystemID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _?: #go(error: .missingQuoteBeforeDOCTYPESystemID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .betweenDOCTYPEPublicAndSystemIDs: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case ">": #go(emitDOCTYPE: .data)
case "\"": #go(clearSystemID: .doctypeSystemIDDoubleQuoted)
case "'": #go(clearSystemID: .doctypeSystemIDSingleQuoted)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPESystemID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _?: #go(error: .missingQuoteBeforeDOCTYPESystemID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .afterDOCTYPESystemKeyword: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": #go(to: .beforeDOCTYPESystemID)
case "\"": #go(error: .missingSpaceAfterDOCTYPESystemKeyword, clearSystemID: .doctypeSystemIDDoubleQuoted)
case "'": #go(error: .missingSpaceAfterDOCTYPESystemKeyword, clearSystemID: .doctypeSystemIDSingleQuoted)
case ">": #go(error: .missingDOCTYPESystemID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPESystemID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _?: #go(error: .missingQuoteBeforeDOCTYPESystemID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .beforeDOCTYPESystemID: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case "\"": #go(clearSystemID: .doctypeSystemIDDoubleQuoted)
case "'": #go(clearSystemID: .doctypeSystemIDSingleQuoted)
case ">": #go(error: .missingDOCTYPESystemID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .missingQuoteBeforeDOCTYPESystemID, .unexpectedNull, forceQuirks: .bogusDOCTYPE)
case _?: #go(error: .missingQuoteBeforeDOCTYPESystemID, forceQuirks: .bogusDOCTYPE)
}
} while true
case .doctypeSystemIDDoubleQuoted: repeat {
switch self.getChar(from: &input) {
case "\"": #go(to: .afterDOCTYPESystemID)
case "\0": #go(error: .unexpectedNull, appendSystemID: "\u{FFFD}")
case ">": #go(error: .abruptDOCTYPESystemID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case let c?: #go(appendSystemID: c)
}
} while true
case .doctypeSystemIDSingleQuoted: repeat {
switch self.getChar(from: &input) {
case "'": #go(to: .afterDOCTYPESystemID)
case "\0": #go(error: .unexpectedNull, appendSystemID: "\u{FFFD}")
case ">": #go(error: .abruptDOCTYPESystemID, emitForceQuirksDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case let c?: #go(appendSystemID: c)
}
} while true
case .afterDOCTYPESystemID: repeat {
switch self.getChar(from: &input) {
case "\t", "\n", "\u{0C}", " ": break
case ">": #go(emitDOCTYPE: .data)
case nil: self.emitError(.eofInDOCTYPE); #goEmitForceQuirksDOCTYPEAndEOF
case "\0": #go(error: .unexpectedCharAfterDOCTYPE, .unexpectedNull, to: .bogusDOCTYPE)
case _?: #go(error: .unexpectedCharAfterDOCTYPE, to: .bogusDOCTYPE)
}
} while true
case .bogusDOCTYPE: repeat {
switch self.getChar(from: &input) {
case ">": #go(emitDOCTYPE: .data)
case "\0": self.emitError(.unexpectedNull)
case nil: #goEmitDOCTYPEAndEOF
case _: break
}
} while true
case .cdataSection: repeat {
switch self.getChar(from: &input) {
case "]": #go(to: .cdataSectionBracket)
case nil: #go(error: .eofInCDATA, emit: .eof)
case let c?: #go(emit: c)
}
} while true
case .cdataSectionBracket: repeat {
switch self.getChar(from: &input) {
case "]": #go(to: .cdataSectionEnd)
case nil: #go(error: .eofInCDATA, emit: "]", .eof)
case let c?: #go(emit: "]", .char(c), to: .cdataSection)
}
} while true
case .cdataSectionEnd: repeat {
switch self.getChar(from: &input) {
case "]": #go(emit: "]")
case ">": #go(to: .data)
case nil: #go(error: .eofInCDATA, emit: "]", .eof)
case let c?: #go(emit: "]", .char(c), to: .cdataSection)
}
} while true
}
}
@inline(__always)
mutating func processCharRef(_ scalars: consuming [Unicode.Scalar]) {
switch self.state {
case .data, .rcdata: for scalar in scalars { #go(emit: Character(scalar)) }
case .attributeValueDoubleQuoted, .attributeValueSingleQuoted, .attributeValueUnquoted:
for scalar in scalars { #go(appendAttrValue: Character(scalar)) }
case _: preconditionFailure("unreachable")
}
}
@inline(__always)
mutating func processCharRef(_ c: consuming Character) {
switch self.state {
case .data, .rcdata: #go(emit: c)
case .attributeValueDoubleQuoted, .attributeValueSingleQuoted, .attributeValueUnquoted: #go(appendAttrValue: c)
case _: preconditionFailure("unreachable")
}
}
@inline(__always)
private mutating func getChar(from input: inout Deque<Character>) -> Character? {
guard let reconsumeChar else {
guard let c = input.popFirst() else { return nil }
guard c != "\r\n", c != "\r" else { return "\n" }
switch c.firstScalar.value {
// Swift's String cannot have surrogates
// case 0xD800...0xDBFF, 0xDC00...0xDFFF:
// self.emitError(.surrogateInInput)
case 0xFDD0...0xFDEF, 0xFFFE, 0xFFFF, 0x1FFFE, 0x1FFFF, 0x2FFFE, 0x2FFFF,
0x3FFFE, 0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE, 0x5FFFF, 0x6FFFE, 0x6FFFF,
0x7FFFE, 0x7FFFF, 0x8FFFE, 0x8FFFF, 0x9FFFE, 0x9FFFF, 0xAFFFE, 0xAFFFF,
0xBFFFE, 0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE, 0xDFFFF, 0xEFFFE, 0xEFFFF,
0xFFFFE, 0xFFFFF, 0x10FFFE, 0x10FFFF:
self.emitError(.noncharacterInInput)
case 0x01...0x08, 0x0B, 0x0E...0x1F, 0x7F...0x9F:
self.emitError(.controlCharInInput)
case _: break
}
return c
}
self.reconsumeChar = nil
return reconsumeChar
}
@inline(__always)
func peek(_ input: borrowing Deque<Character>) -> Character? {
guard let reconsumeChar else {
return input.first
}
return reconsumeChar
}
@inline(__always)
mutating func discardChar(_ input: inout Deque<Character>) {
switch self.reconsumeChar {
case .some: self.reconsumeChar = nil
case .none: input.removeFirst()
}
}
@inline(__always)
private mutating func startsExact(
_ input: inout Deque<Character>,
with pattern: consuming String
) -> Bool? {
var iter = input.makeIterator()
let count = pattern.count
for pc in pattern {
guard let c = iter.next() else { return nil }
guard consume c == consume pc else { return false }
}
input.removeFirst(count)
return true
}
@inline(__always)
private mutating func starts(
_ input: inout Deque<Character>,
with pattern: consuming String
) -> Bool? {
var iter = input.makeIterator()
let count = pattern.count
for pc in pattern {
guard let c = iter.next() else { return nil }
guard c.lowercased() == pc.lowercased() else { return false }
}
input.removeFirst(count)
return true
}
@inline(__always)
private mutating func go(to state: consuming State) {
self.state = state
}
@inline(__always)
private mutating func go(reconsume c: consuming Character, in state: consuming State) {
self.reconsumeChar = c
self.state = state
}
@inline(__always)
private mutating func emit(_ c: consuming Character) {
self.sink.process(.char(c))
}
@_disfavoredOverload
@inline(__always)
private mutating func emit(_ token: consuming Token) {
self.sink.process(token)
}
@inline(__always)
private mutating func emitEOF() {
self.sink.process(.eof)
}
@inline(__always)
mutating func emitError(_ error: consuming ParseError) {
self.sink.process(.error(error))
}
@inline(__always)
private mutating func createTempBuffer(with c: consuming Character) {