How to use peek method of io.kotest.engine.tags.Lexerprivate class

Best Kotest code snippet using io.kotest.engine.tags.Lexerprivate.peek

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1private class Lexer(private val input: String) {2 private var ch: Char = 0.toChar()3 init {4 readChar()5 }6 fun readChar() {7 if (readPosition >= input.length) {8 ch = 0.toChar()9 } else {10 }11 }12 fun peekChar(): Char {13 if (readPosition >= input.length) {14 return 0.toChar()15 } else {16 }17 }18 fun nextToken(): Token {19 skipWhitespace()20 when (ch) {21 '=' -> {22 if (peekChar() == '=') {23 readChar()24 val literal = "$ch${ch}"25 tok = Token(EQ, literal)26 } else {27 tok = newToken(ASSIGN, ch)28 }29 }30 '+' -> tok = newToken(PLUS, ch)31 '-' -> tok = newToken(MINUS, ch)32 '!' -> {33 if (peekChar() == '=') {34 readChar()35 val literal = "$ch${ch}"36 tok = Token(NOT_EQ, literal)37 } else {38 tok = newToken(BANG, ch)39 }40 }41 '/' -> tok = newToken(SLASH, ch)42 '*' -> tok = newToken(ASTERISK, ch)43 '<' -> tok = newToken(LT, ch)44 '>' -> tok = newToken(GT, ch)45 '(' -> tok = newToken(LPAREN, ch)46 ')' -> tok = newToken(RPAREN, ch)47 ',' -> tok = newToken(COMMA, ch)48 ';' -> tok = newToken(SEMICOLON, ch)49 '{' -> tok = newToken(LBRACE, ch)50 '}' -> tok = newToken(RBRACE, ch)51 '[' -> tok = newToken(LBRACKET, ch)52 ']' -> tok = newToken(RBRACKET, ch)53 ':' -> tok = newToken(COLON, ch)54 0.toChar() -> tok = Token(EOF, "")

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1private class Lexer(val input: String) {2 init {3 readChar()4 }5 private fun readChar() {6 if (readPosition >= input.length)7 ch = 0.toChar()8 }9 fun peekChar(): Char {10 if (readPosition >= input.length)11 return 0.toChar()12 }13 fun nextToken(): Token {14 when (ch) {15 '=' -> {16 if (peekChar() == '=') {17 readChar()18 val literal = "$ch${ch}"19 tok = Token(EQ, literal)20 } else {21 tok = newToken(ASSIGN, ch)22 }23 }24 '+' -> tok = newToken(PLUS, ch)25 '-' -> tok = newToken(MINUS, ch)26 '!' -> {27 if (peekChar() == '=') {28 readChar()29 val literal = "$ch${ch}"30 tok = Token(NOT_EQ, literal)31 } else {32 tok = newToken(BANG, ch)33 }34 }35 '*' -> tok = newToken(ASTERISK, ch)36 '/' -> tok = newToken(SLASH, ch)37 '<' -> tok = newToken(LT, ch)38 '>' -> tok = newToken(GT, ch)39 ',' -> tok = newToken(COMMA, ch)40 ';' -> tok = newToken(SEMICOLON, ch)41 '(' -> tok = newToken(LPAREN, ch)42 ')' -> tok = newToken(RPAREN, ch)43 '{' -> tok = newToken(LBRACE, ch)44 '}' -> tok = newToken(RBRACE, ch)45 '[' -> tok = newToken(LBRACKET, ch)46 ']' -> tok = newToken(RBRACKET, ch)47 ':' -> tok = newToken(COLON, ch)48 0.toChar() -> tok = Token(EOF, "")49 else -> {50 if (isLetter(ch)) {

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1private class Lexer(private val text: String) {2 private fun error() {3 throw Exception("Invalid character")4 }5 private fun advance() {6 currentChar = if (pos > text.lastIndex) {7 0.toChar()8 } else {9 }10 }11 private fun skipWhitespace() {12 while (currentChar != 0.toChar() && currentChar.isWhitespace()) {13 advance()14 }15 }16 private fun integer(): Token {17 while (currentChar != 0.toChar() && currentChar.isDigit()) {18 advance()19 }20 return Token(INTEGER, result)21 }22 private fun id(): Token {23 while (currentChar != 0.toChar() && currentChar.isLetterOrDigit()) {24 advance()25 }26 return Token(tokenType, result)27 }28 fun getNextToken(): Token {29 while (currentChar != 0.toChar()) {30 if (currentChar.isWhitespace()) {31 skipWhitespace()32 }33 if (currentChar.isLetter()) {34 return id()35 }36 if (currentChar.isDigit()) {37 return integer()38 }39 if (currentChar == ',') {40 advance()41 return Token(COMMA, ",")42 }43 if (currentChar == '(') {44 advance()45 return Token(LPAREN, "(")46 }47 if (currentChar == ')') {48 advance()49 return Token(RPAREN, ")")50 }51 error()52 }53 return Token(EOF, "")54 }55}56private class Lexer2(private val text: String) {57 private fun error() {58 throw Exception("Invalid character")59 }60 private fun advance() {61 currentChar = if (pos > text.lastIndex) {62 0.toChar()63 } else {64 }65 }66 private fun skipWhitespace()

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1private class Lexer(private val input: String) : Iterator<Token> {2 override fun hasNext(): Boolean {3 }4 override fun next(): Token {5 current = current ?: readToken()6 }7 private fun peek(): Char? {8 return if (pos < input.length) input[pos] else null9 }10 private fun readToken(): Token {11 return when (c) {12 '&' -> if (peek() == '&') {13 } else {14 }15 '|' -> if (peek() == '|') {16 } else {17 }18 ' ' -> readToken()19 else -> if (c.isLetter()) {20 Token.Literal(c)21 } else {22 }23 }24 }25}26private class Parser(private val input: String) {27 private val lexer = Lexer(input)28 fun parse(): List<TagExpression> {29 val expressions = mutableListOf<TagExpression>()30 while (lexer.hasNext()) {31 expressions.add(parseExpression())32 }33 }34 private fun parseExpression(): TagExpression {35 var expr = parseTerm()36 while (lexer.hasNext()) {37 val c = lexer.peek()38 if (c != Token.Or) break39 lexer.next()40 expr = Or(expr, parseTerm())41 }42 }43 private fun parseTerm(): TagExpression {44 var expr = parseFactor()45 while (lexer.hasNext()) {46 val c = lexer.peek()47 if (c != Token.And) break48 lexer.next()49 expr = And(expr, parseFactor())50 }51 }52 private fun parseFactor(): TagExpression {53 val c = lexer.peek()54 return if (c == Token.Open) {55 lexer.next()56 val expr = parseExpression()

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1 override fun next() = next ?: lexer.next().also { next = it }2 fun peek(): Token = next ?: lexer.next().also { next = it }3 override fun close() = lexer.close()4}5private class TagParser(private val lexer: Lexer) : Closeable {6 private val stack = ArrayDeque<Tag>()7 fun peek(): Tag {8 return next ?: parseTag().also { next = it }9 }10 fun next(): Tag {11 if (!peeked) next = parseTag()12 }13 private fun parseTag(): Tag {14 val token = lexer.next()15 return when (token) {16 is Token.Open -> {17 val tag = Tag(token.name)18 stack.push(tag)19 }20 is Token.Close -> {21 val tag = stack.pop()22 if (tag.name != token.name) throw TagParseException("Mismatched closing tag '${token.name}'")23 }24 is Token.Text -> {25 val tag = Tag(null, token.text)26 if (stack.isNotEmpty()) stack.peek().children.add(tag)27 }28 }29 }30 override fun close() = lexer.close()31}32private sealed class Token {33 class Open(val name: String) : Token()34 class Close(val name: String) : Token()35 class Text(val text: String) : Token()36}37private class TagParseException(message: String) : Exception(message)

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Most used method in Lexerprivate