diff --git a/.gitignore b/.gitignore
index 136f4eb..b63da45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,29 +1,42 @@
-.DS_Store
-.idea
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
-# ---> Kotlin
-# Compiled class file
-*.class
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
-# Log file
-*.log
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
-# BlueJ files
-*.ctxt
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
-# Mobile Tools for Java (J2ME)
-.mtj.tmp/
-
-# Package Files #
-*.jar
-*.war
-*.nar
-*.ear
-*.zip
-*.tar.gz
-*.rar
-
-# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
-hs_err_pid*
-replay_pid*
+### VS Code ###
+.vscode/
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000..919ce1f
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,7 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/codeStyles/codeStyleConfig.xml b/.idea/codeStyles/codeStyleConfig.xml
new file mode 100644
index 0000000..a55e7a1
--- /dev/null
+++ b/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
new file mode 100644
index 0000000..3e4bbe1
--- /dev/null
+++ b/.idea/gradle.xml
@@ -0,0 +1,17 @@
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/kotlinc.xml b/.idea/kotlinc.xml
new file mode 100644
index 0000000..6d0ee1c
--- /dev/null
+++ b/.idea/kotlinc.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 0000000..f16dea7
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,10 @@
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/sbt.xml b/.idea/sbt.xml
new file mode 100644
index 0000000..2018743
--- /dev/null
+++ b/.idea/sbt.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..35eb1dd
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+
+
+
+
+
+
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..0f1053f
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,33 @@
+plugins {
+ kotlin("jvm") version "2.0.0"
+}
+
+group = "fr.celticinfo"
+version = "1.0-SNAPSHOT"
+
+repositories {
+ mavenCentral()
+}
+
+dependencies {
+ testImplementation(kotlin("test"))
+}
+
+sourceSets {
+ main {
+ java.srcDirs("src/main")
+ }
+ test {
+ java.srcDirs("src/test")
+ }
+}
+
+tasks.test {
+ useJUnitPlatform()
+ testLogging {
+ events("passed", "skipped", "failed")
+ }
+}
+kotlin {
+ jvmToolchain(21)
+}
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..7fc6f1f
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1 @@
+kotlin.code.style=official
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..249e583
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..962f403
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Fri Jun 21 04:48:26 EDT 2024
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..1b6c787
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+# Gradle start up script for POSIX generated by Gradle.
+#
+# Important for running:
+#
+# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+# noncompliant, but you have some other compliant shell such as ksh or
+# bash, then to run this script, type that shell name before the whole
+# command line, like:
+#
+# ksh Gradle
+#
+# Busybox and similar reduced shells will NOT work, because this script
+# requires all of these POSIX shell features:
+# * functions;
+# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+# * compound commands having a testable exit status, especially «case»;
+# * various built-in commands including «command», «set», and «ulimit».
+#
+# Important for patching:
+#
+# (2) This script targets any POSIX shell, so it avoids extensions provided
+# by Bash, Ksh, etc; in particular arrays are avoided.
+#
+# The "traditional" practice of packing multiple parameters into a
+# space-separated string is a well documented source of bugs and security
+# problems, so this is (mostly) avoided, by progressively accumulating
+# options in "$@", and eventually passing that to Java.
+#
+# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+# see the in-line comments for details.
+#
+# There are tweaks for specific operating systems such as AIX, CygWin,
+# Darwin, MinGW, and NonStop.
+#
+# (3) This script is generated from the Groovy template
+# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+# within the Gradle project.
+#
+# You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+ APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
+ [ -h "$app_path" ]
+do
+ ls=$( ls -ld "$app_path" )
+ link=${ls#*' -> '}
+ case $link in #(
+ /*) app_path=$link ;; #(
+ *) app_path=$APP_HOME$link ;;
+ esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+ echo "$*"
+} >&2
+
+die () {
+ echo
+ echo "$*"
+ echo
+ exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in #(
+ CYGWIN* ) cygwin=true ;; #(
+ Darwin* ) darwin=true ;; #(
+ MSYS* | MINGW* ) msys=true ;; #(
+ NONSTOP* ) nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD=$JAVA_HOME/jre/sh/java
+ else
+ JAVACMD=$JAVA_HOME/bin/java
+ fi
+ if [ ! -x "$JAVACMD" ] ; then
+ die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+ fi
+else
+ JAVACMD=java
+ which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+ case $MAX_FD in #(
+ max*)
+ MAX_FD=$( ulimit -H -n ) ||
+ warn "Could not query maximum file descriptor limit"
+ esac
+ case $MAX_FD in #(
+ '' | soft) :;; #(
+ *)
+ ulimit -n "$MAX_FD" ||
+ warn "Could not set maximum file descriptor limit to $MAX_FD"
+ esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+# * args from the command line
+# * the main class name
+# * -classpath
+# * -D...appname settings
+# * --module-path (only if needed)
+# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+ APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+ CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+ JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+ # Now convert the arguments - kludge to limit ourselves to /bin/sh
+ for arg do
+ if
+ case $arg in #(
+ -*) false ;; # don't mess with options #(
+ /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
+ [ -e "$t" ] ;; #(
+ *) false ;;
+ esac
+ then
+ arg=$( cygpath --path --ignore --mixed "$arg" )
+ fi
+ # Roll the args list around exactly as many times as the number of
+ # args, so each arg winds up back in the position where it started, but
+ # possibly modified.
+ #
+ # NB: a `for` loop captures its iteration list before it begins, so
+ # changing the positional parameters here affects neither the number of
+ # iterations, nor the values presented in `arg`.
+ shift # remove old arg
+ set -- "$@" "$arg" # push replacement arg
+ done
+fi
+
+# Collect all arguments for the java command;
+# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+# shell script including quotes and variable substitutions, so put them in
+# double quotes to make sure that they get re-expanded; and
+# * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+ "-Dorg.gradle.appname=$APP_BASE_NAME" \
+ -classpath "$CLASSPATH" \
+ org.gradle.wrapper.GradleWrapperMain \
+ "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+# set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+ printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+ xargs -n1 |
+ sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+ tr '\n' ' '
+ )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..ac1b06f
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..bb1c51e
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,5 @@
+plugins {
+ id("org.gradle.toolchains.foojay-resolver-convention") version "0.5.0"
+}
+rootProject.name = "kotlinlox"
+
diff --git a/src/main/fr/celticinfo/lox/Lox.kt b/src/main/fr/celticinfo/lox/Lox.kt
new file mode 100644
index 0000000..a62977e
--- /dev/null
+++ b/src/main/fr/celticinfo/lox/Lox.kt
@@ -0,0 +1,55 @@
+package fr.celticinfo.lox
+
+import kotlin.system.exitProcess
+
+fun main(args: Array) {
+ val lox = Lox()
+
+ when (args.size) {
+ 0 -> lox.runPrompt()
+ 1 -> lox.runFile(args.first())
+ else -> {println("Usage: jlox [script]") ; exitProcess(64)}
+ }
+}
+
+/**
+ * Lox is the main class that runs the Lox interpreter.
+ */
+class Lox {
+ private var hadError = false
+
+ fun runPrompt() {
+ while (true) {
+ print("> ")
+ val line = readlnOrNull() ?: break
+ run(line)
+ hadError = false;
+ }
+ }
+
+ fun runFile(filename: String) {
+ // read all bytes from a file
+ val bytes = java.io.File(filename).readBytes()
+ run(String(bytes))
+ // Indicate an error in the exit code.
+ if (hadError) exitProcess(65)
+ }
+
+ private fun run(source: String) {
+ val scanner = Scanner(source)
+ val tokens = scanner.scanTokens()
+ for (token in tokens) {
+ println(token)
+ }
+ }
+
+ companion object {
+ fun error(line: Int, s: String) {
+ report(line, "", s)
+ }
+
+ private fun report(line: Int, where: String, message: String) {
+ System.err.println("[line $line] Error$where: $message")
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/main/fr/celticinfo/lox/Scanner.kt b/src/main/fr/celticinfo/lox/Scanner.kt
new file mode 100644
index 0000000..508087d
--- /dev/null
+++ b/src/main/fr/celticinfo/lox/Scanner.kt
@@ -0,0 +1,202 @@
+package fr.celticinfo.lox
+
+import fr.celticinfo.lox.TokenType.*
+
+/**
+ * The Scanner class is responsible for scanning the source code and generating tokens.
+ * It handles different types of tokens including identifiers, numbers, strings, and special characters.
+ * It also handles comments and ignores whitespaces.
+ *
+ * @property source The source code to be scanned.
+ * @property tokens The list of tokens generated from the source code.
+ * @property start The starting index of the current lexeme in the source code.
+ * @property current The current index in the source code.
+ * @property line The current line number in the source code.
+ */
+class Scanner {
+ private val source: String
+ private val tokens: MutableList = mutableListOf()
+ private var start = 0
+ private var current = 0
+ private var line = 1
+
+ constructor(source: String) {
+ this.source = source
+ }
+
+ fun scanTokens(): List {
+ while (!isAtEnd()) {
+ // We are at the beginning of the next lexeme.
+ start = current
+ scanToken()
+ }
+
+ tokens.add(Token(TokenType.EOF, "", null, line))
+ return tokens
+ }
+
+ private fun isAtEnd(): Boolean {
+ return current >= source.length
+ }
+
+ private fun scanToken() {
+ when (val c = advance()) {
+ '(' -> addToken(LEFT_PAREN)
+ ')' -> addToken(RIGHT_PAREN)
+ '{' -> addToken(LEFT_BRACE)
+ '}' -> addToken(RIGHT_BRACE)
+ ',' -> addToken(COMMA)
+ '.' -> addToken(DOT)
+ '-' -> addToken(MINUS)
+ '+' -> addToken(PLUS)
+ ';' -> addToken(SEMICOLON)
+ '*' -> addToken(STAR)
+ '!' -> addToken(if (match('=')) BANG_EQUAL else BANG)
+ '=' -> addToken(if (match('=')) EQUAL_EQUAL else EQUAL)
+ '<' -> addToken(if (match('=')) LESS_EQUAL else LESS)
+ '>' -> addToken(if (match('=')) GREATER_EQUAL else GREATER)
+ ' ', '\r', '\t' -> {/* Ignore whitespace. */ }
+ '"' -> string()
+ '\n' -> line++
+ '/' -> when {
+ match('/') -> eatLineComment()
+ match('*') -> eatBlockComment()
+ else -> addToken(SLASH)
+ }
+ else -> {
+ when {
+ c.isDigit() -> number()
+ c.isLetter() -> identifier()
+ else -> Lox.error(line, "Unexpected character.")
+ }
+ }
+ }
+ }
+
+ private fun identifier() {
+ while (peek().isLetterOrDigit()) advance()
+
+ // See if the identifier is a reserved word.
+ val text = source.substring(start, current)
+ val type = keywords[text] ?: IDENTIFIER
+ addToken(type)
+ }
+
+ private fun number() {
+ while (peek().isDigit()) advance()
+
+ // Look for a fractional part.
+ if (peek() == '.' && peekNext().isDigit()) {
+ // Consume the "."
+ advance()
+
+ while (peek().isDigit()) advance()
+ }
+
+ addToken(NUMBER, source.substring(start, current).toDouble())
+ }
+
+ private fun peekNext(): Char {
+ if (current + 1 >= source.length) return '\u0000'
+ return source[current + 1]
+ }
+
+ private fun string() {
+ while (peek() != '"' && !isAtEnd()) {
+ if (peek() == '\n') line++
+ advance()
+ }
+
+ // Unterminated string.
+ if (isAtEnd()) {
+ Lox.error(line, "Unterminated string.")
+ return
+ }
+
+ // The closing ".
+ advance()
+
+ // Trim the surrounding quotes.
+ val value = source.substring(start + 1, current - 1)
+ addToken(STRING, value)
+ }
+
+ private fun advance(): Char {
+ current++
+ return source[current - 1]
+ }
+
+ private fun addToken(type: TokenType, literal: Any? = null) {
+ val text = source.substring(start, current)
+ tokens.add(Token(type, text, literal, line))
+ }
+
+ private fun match(expected: Char): Boolean {
+ if (isAtEnd()) return false
+ if (source[current] != expected) return false
+
+ current++
+ return true
+ }
+
+ private fun peek(): Char {
+ if (isAtEnd()) return '\u0000'
+ return source[current]
+ }
+
+ private fun eatLineComment() {
+ // A comment goes until the end of the line.
+ while (peek() != '\n' && !isAtEnd()) advance()
+ }
+
+ private fun eatBlockComment() {
+ var nesting = 1
+ while (nesting > 0 && !isAtEnd()) {
+ when {
+ peek() == '/' && peekNext() == '*' -> {
+ advance()
+ advance()
+ nesting++
+ }
+
+ peek() == '*' && peekNext() == '/' -> {
+ advance()
+ advance()
+ nesting--
+ }
+
+ peek() == '\n' -> {
+ line++
+ advance()
+ }
+
+ else -> advance()
+ }
+ }
+
+ if (nesting > 0) {
+ Lox.error(line, "Unterminated block comment.")
+ }
+ }
+
+ companion object {
+ private val keywords = mapOf(
+ "and" to AND,
+ "class" to CLASS,
+ "else" to ELSE,
+ "false" to FALSE,
+ "for" to FOR,
+ "fun" to FUN,
+ "if" to IF,
+ "nil" to NIL,
+ "or" to OR,
+ "print" to PRINT,
+ "return" to RETURN,
+ "super" to SUPER,
+ "this" to THIS,
+ "true" to TRUE,
+ "var" to VAR,
+ "while" to WHILE
+ )
+ }
+}
\ No newline at end of file
diff --git a/src/main/fr/celticinfo/lox/Token.kt b/src/main/fr/celticinfo/lox/Token.kt
new file mode 100644
index 0000000..68f13c6
--- /dev/null
+++ b/src/main/fr/celticinfo/lox/Token.kt
@@ -0,0 +1,16 @@
+package fr.celticinfo.lox
+
+/**
+ * The Token class represents a token in the Lox language. A token is a meaningful unit of code,
+ * such as a keyword, identifier, operator, or literal value.
+ *
+ * @property type The type of the token, represented as a TokenType.
+ * @property lexeme The raw text of the token as it appears in the source code.
+ * @property literal The literal value of the token, if it has one. For example, the literal value of a number token is the numeric value it represents.
+ * @property line The line number in the source code where the token appears.
+ */
+data class Token(val type: TokenType, val lexeme: String, val literal: Any?, val line: Int) {
+ override fun toString(): String {
+ return "$type $lexeme $literal $line"
+ }
+}
\ No newline at end of file
diff --git a/src/main/fr/celticinfo/lox/TokenType.kt b/src/main/fr/celticinfo/lox/TokenType.kt
new file mode 100644
index 0000000..baa48fb
--- /dev/null
+++ b/src/main/fr/celticinfo/lox/TokenType.kt
@@ -0,0 +1,27 @@
+package fr.celticinfo.lox
+
+/**
+ * The TokenType enum represents the different types of tokens that can be recognized by the Scanner.
+ * This includes various keywords, operators, literals, and identifiers in the Lox language.
+ */
+enum class TokenType {
+ // Single-character tokens.
+ LEFT_PAREN, RIGHT_PAREN, LEFT_BRACE, RIGHT_BRACE,
+ COMMA, DOT, MINUS, PLUS, SEMICOLON, SLASH, STAR,
+
+ // One or two character tokens.
+ BANG, BANG_EQUAL,
+ EQUAL, EQUAL_EQUAL,
+ GREATER, GREATER_EQUAL,
+ LESS, LESS_EQUAL,
+
+ // Literals.
+ IDENTIFIER, STRING, NUMBER,
+
+ // Keywords.
+ AND, CLASS, ELSE, FALSE, FUN, FOR, IF, NIL, OR,
+ PRINT, RETURN, SUPER, THIS, TRUE, VAR, WHILE,
+
+ // End of file.
+ EOF
+}
\ No newline at end of file
diff --git a/src/test/fr/celticinfo/lox/ScannerTest.kt b/src/test/fr/celticinfo/lox/ScannerTest.kt
new file mode 100644
index 0000000..2b6b81d
--- /dev/null
+++ b/src/test/fr/celticinfo/lox/ScannerTest.kt
@@ -0,0 +1,203 @@
+package fr.celticinfo.lox
+
+import org.junit.jupiter.api.Test
+import kotlin.test.assertEquals
+import fr.celticinfo.lox.TokenType.*
+
+class ScannerTest {
+
+ @Test
+ fun `validate scanner`() {
+
+ val code = """
+// Your first Lox program!
+print "Hello, world!";
+true; // Not false.
+false; // Not *not* false.
+1234; // An integer.
+12.34; // A decimal number.
+"I am a string";
+""; // The empty string.
+"123"; // This is a string, not a number.
++ / * -
+< <= > >= == !=
+!true and or
+var average = (min + max) / 2;
+{
+ print "Two statements.";
+}
+if (condition)
+{
+} else
+{
+}
+while (a < 10)
+{
+ a = a + 1;
+}
+for (var a = 1; a < 10; a = a + 1)
+{
+ print a;
+}
+makeBreakfast(bacon, eggs, toast);
+fun returnSum(a, b)
+{
+ return a + b;
+}
+class Breakfast
+{
+ cook()
+ {
+ print "Eggs a-fryin'!";
+ }
+}
+breakfast.meat = "sausage";
+
+ /* coucou
+ /* hi
+ hi */
+ */
+ """.trimIndent()
+ val scanner = Scanner(code)
+ val expected = listOf(
+ Token(PRINT, "print", null, 2),
+ Token(STRING, "\"Hello, world!\"", "Hello, world!", 2),
+ Token(SEMICOLON, ";", null, 2),
+ Token(TRUE, "true", null, 3),
+ Token(SEMICOLON, ";", null, 3),
+ Token(FALSE, "false", null, 4),
+ Token(SEMICOLON, ";", null, 4),
+ Token(NUMBER, "1234", 1234.0, 5),
+ Token(SEMICOLON, ";", null, 5),
+ Token(NUMBER, "12.34", 12.34, 6),
+ Token(SEMICOLON, ";", null, 6),
+ Token(STRING, "\"I am a string\"", "I am a string", 7),
+ Token(SEMICOLON, ";", null, 7),
+ Token(STRING, "\"\"", "", 8),
+ Token(SEMICOLON, ";", null, 8),
+ Token(STRING, "\"123\"", "123", 9),
+ Token(SEMICOLON, ";", null, 9),
+ Token(PLUS, "+", null, 10),
+ Token(SLASH, "/", null, 10),
+ Token(STAR, "*", null, 10),
+ Token(MINUS, "-", null, 10),
+ Token(LESS, "<", null, 11),
+ Token(LESS_EQUAL, "<=", null, 11),
+ Token(GREATER, ">", null, 11),
+ Token(GREATER_EQUAL, ">=", null, 11),
+ Token(EQUAL_EQUAL, "==", null, 11),
+ Token(BANG_EQUAL, "!=", null, 11),
+ Token(BANG, "!", null, 12),
+ Token(TRUE, "true", null, 12),
+ Token(AND, "and", null, 12),
+ Token(OR, "or", null, 12),
+ Token(VAR, "var", null, 13),
+ Token(IDENTIFIER, "average", null, 13),
+ Token(EQUAL, "=", null, 13),
+ Token(LEFT_PAREN, "(", null, 13),
+ Token(IDENTIFIER, "min", null, 13),
+ Token(PLUS, "+", null, 13),
+ Token(IDENTIFIER, "max", null, 13),
+ Token(RIGHT_PAREN, ")", null, 13),
+ Token(SLASH, "/", null, 13),
+ Token(NUMBER, "2", 2.0, 13),
+ Token(SEMICOLON, ";", null, 13),
+ Token(LEFT_BRACE, "{", null, 14),
+ Token(PRINT, "print", null, 15),
+ Token(STRING, "\"Two statements.\"", "Two statements.", 15),
+ Token(SEMICOLON, ";", null, 15),
+ Token(RIGHT_BRACE, "}", null, 16),
+ Token(IF, "if", null, 17),
+ Token(LEFT_PAREN, "(", null, 17),
+ Token(IDENTIFIER, "condition", null, 17),
+ Token(RIGHT_PAREN, ")", null, 17),
+ Token(LEFT_BRACE, "{", null, 18),
+ Token(RIGHT_BRACE, "}", null, 19),
+ Token(ELSE, "else", null, 19),
+ Token(LEFT_BRACE, "{", null, 20),
+ Token(RIGHT_BRACE, "}", null, 21),
+ Token(WHILE, "while", null, 22),
+ Token(LEFT_PAREN, "(", null, 22),
+ Token(IDENTIFIER, "a", null, 22),
+ Token(LESS, "<", null, 22),
+ Token(NUMBER, "10", 10.0, 22),
+ Token(RIGHT_PAREN, ")", null, 22),
+ Token(LEFT_BRACE, "{", null, 23),
+ Token(IDENTIFIER, "a", null, 24),
+ Token(EQUAL, "=", null, 24),
+ Token(IDENTIFIER, "a", null, 24),
+ Token(PLUS, "+", null, 24),
+ Token(NUMBER, "1", 1.0, 24),
+ Token(SEMICOLON, ";", null, 24),
+ Token(RIGHT_BRACE, "}", null, 25),
+ Token(FOR, "for", null, 26),
+ Token(LEFT_PAREN, "(", null, 26),
+ Token(VAR, "var", null, 26),
+ Token(IDENTIFIER, "a", null, 26),
+ Token(EQUAL, "=", null, 26),
+ Token(NUMBER, "1", 1.0, 26),
+ Token(SEMICOLON, ";", null, 26),
+ Token(IDENTIFIER, "a", null, 26),
+ Token(LESS, "<", null, 26),
+ Token(NUMBER, "10", 10.0, 26),
+ Token(SEMICOLON, ";", null, 26),
+ Token(IDENTIFIER, "a", null, 26),
+ Token(EQUAL, "=", null, 26),
+ Token(IDENTIFIER, "a", null, 26),
+ Token(PLUS, "+", null, 26),
+ Token(NUMBER, "1", 1.0, 26),
+ Token(RIGHT_PAREN, ")", null, 26),
+ Token(LEFT_BRACE, "{", null, 27),
+ Token(PRINT, "print", null, 28),
+ Token(IDENTIFIER, "a", null, 28),
+ Token(SEMICOLON, ";", null, 28),
+ Token(RIGHT_BRACE, "}", null, 29),
+ Token(IDENTIFIER, "makeBreakfast", null, 30),
+ Token(LEFT_PAREN, "(", null, 30),
+ Token(IDENTIFIER, "bacon", null, 30),
+ Token(COMMA, ",", null, 30),
+ Token(IDENTIFIER, "eggs", null, 30),
+ Token(COMMA, ",", null, 30),
+ Token(IDENTIFIER, "toast", null, 30),
+ Token(RIGHT_PAREN, ")", null, 30),
+ Token(SEMICOLON, ";", null, 30),
+ Token(FUN, "fun", null, 31),
+ Token(IDENTIFIER, "returnSum", null, 31),
+ Token(LEFT_PAREN, "(", null, 31),
+ Token(IDENTIFIER, "a", null, 31),
+ Token(COMMA, ",", null, 31),
+ Token(IDENTIFIER, "b", null, 31),
+ Token(RIGHT_PAREN, ")", null, 31),
+ Token(LEFT_BRACE, "{", null, 32),
+ Token(RETURN, "return", null, 33),
+ Token(IDENTIFIER, "a", null, 33),
+ Token(PLUS, "+", null, 33),
+ Token(IDENTIFIER, "b", null, 33),
+ Token(SEMICOLON, ";", null, 33),
+ Token(RIGHT_BRACE, "}", null, 34),
+ Token(CLASS, "class", null, 35),
+ Token(IDENTIFIER, "Breakfast", null, 35),
+ Token(LEFT_BRACE, "{", null, 36),
+ Token(IDENTIFIER, "cook", null, 37),
+ Token(LEFT_PAREN, "(", null, 37),
+ Token(RIGHT_PAREN, ")", null, 37),
+ Token(LEFT_BRACE, "{", null, 38),
+ Token(PRINT, "print", null, 39),
+ Token(STRING, "\"Eggs a-fryin'!\"", "Eggs a-fryin'!", 39),
+ Token(SEMICOLON, ";", null, 39),
+ Token(RIGHT_BRACE, "}", null, 40),
+ Token(RIGHT_BRACE, "}", null, 41),
+ Token(IDENTIFIER, "breakfast", null, 42),
+ Token(DOT, ".", null, 42),
+ Token(IDENTIFIER, "meat", null, 42),
+ Token(EQUAL, "=", null, 42),
+ Token(STRING, "\"sausage\"", "sausage", 42),
+ Token(SEMICOLON, ";", null, 42),
+ Token(EOF, "", null, 47))
+
+ val tokens = scanner.scanTokens()
+ expected.zip(tokens).forEach { (expected, actual) ->
+ assertEquals(expected, actual, "Expected $expected but got $actual")
+ }
+ }
+}
\ No newline at end of file
diff --git a/src/test/fr/celticinfo/lox/TokenTest.kt b/src/test/fr/celticinfo/lox/TokenTest.kt
new file mode 100644
index 0000000..e70420b
--- /dev/null
+++ b/src/test/fr/celticinfo/lox/TokenTest.kt
@@ -0,0 +1,16 @@
+package fr.celticinfo.lox
+
+import org.junit.jupiter.api.Test
+import kotlin.test.*
+
+class TokenTest {
+
+ @Test
+ fun testToString() {
+ val token = Token(TokenType.IDENTIFIER, "foo", null, 1)
+ assertEquals("IDENTIFIER foo null 1", token.toString())
+
+ val token2 = Token(TokenType.STRING, "bar", "baz", 2)
+ assertEquals("STRING bar baz 2", token2.toString())
+ }
+}
\ No newline at end of file
diff --git a/src/test/fr/celticinfo/lox/TokenTypeTest.kt b/src/test/fr/celticinfo/lox/TokenTypeTest.kt
new file mode 100644
index 0000000..ec35be8
--- /dev/null
+++ b/src/test/fr/celticinfo/lox/TokenTypeTest.kt
@@ -0,0 +1,56 @@
+package fr.celticinfo.lox
+
+import org.junit.jupiter.api.Test
+import kotlin.test.*
+
+class TokenTypeTest {
+
+ @Test
+ fun `TokenType contains expected values`() {
+ assertTrue(TokenType.values().contains(TokenType.LEFT_PAREN))
+ assertTrue(TokenType.values().contains(TokenType.RIGHT_PAREN))
+ assertTrue(TokenType.values().contains(TokenType.LEFT_BRACE))
+ assertTrue(TokenType.values().contains(TokenType.RIGHT_BRACE))
+ assertTrue(TokenType.values().contains(TokenType.COMMA))
+ assertTrue(TokenType.values().contains(TokenType.DOT))
+ assertTrue(TokenType.values().contains(TokenType.MINUS))
+ assertTrue(TokenType.values().contains(TokenType.PLUS))
+ assertTrue(TokenType.values().contains(TokenType.SEMICOLON))
+ assertTrue(TokenType.values().contains(TokenType.SLASH))
+ assertTrue(TokenType.values().contains(TokenType.STAR))
+
+ assertTrue(TokenType.values().contains(TokenType.BANG))
+ assertTrue(TokenType.values().contains(TokenType.BANG_EQUAL))
+ assertTrue(TokenType.values().contains(TokenType.EQUAL))
+ assertTrue(TokenType.values().contains(TokenType.EQUAL_EQUAL))
+ assertTrue(TokenType.values().contains(TokenType.GREATER))
+ assertTrue(TokenType.values().contains(TokenType.GREATER_EQUAL))
+ assertTrue(TokenType.values().contains(TokenType.LESS))
+ assertTrue(TokenType.values().contains(TokenType.LESS_EQUAL))
+
+ assertTrue(TokenType.values().contains(TokenType.IDENTIFIER))
+ assertTrue(TokenType.values().contains(TokenType.STRING))
+ assertTrue(TokenType.values().contains(TokenType.NUMBER))
+
+ assertTrue(TokenType.values().contains(TokenType.AND))
+ assertTrue(TokenType.values().contains(TokenType.CLASS))
+ assertTrue(TokenType.values().contains(TokenType.ELSE))
+ assertTrue(TokenType.values().contains(TokenType.FALSE))
+ assertTrue(TokenType.values().contains(TokenType.FUN))
+ assertTrue(TokenType.values().contains(TokenType.FOR))
+ assertTrue(TokenType.values().contains(TokenType.IF))
+ assertTrue(TokenType.values().contains(TokenType.NIL))
+ assertTrue(TokenType.values().contains(TokenType.OR))
+ assertTrue(TokenType.values().contains(TokenType.PRINT))
+ assertTrue(TokenType.values().contains(TokenType.RETURN))
+ assertTrue(TokenType.values().contains(TokenType.SUPER))
+ assertTrue(TokenType.values().contains(TokenType.THIS))
+ assertTrue(TokenType.values().contains(TokenType.TRUE))
+ assertTrue(TokenType.values().contains(TokenType.VAR))
+ assertTrue(TokenType.values().contains(TokenType.WHILE))
+
+ assertTrue(TokenType.values().contains(TokenType.EOF))
+
+ assertEquals(39, TokenType.values().size)
+ }
+}
\ No newline at end of file