Migrate tokenizer to Kotlin

build.gradle

@@ -0,0 +1,25 @@
+plugins {
+    id 'java'
+    id 'org.jetbrains.kotlin.jvm' version '1.3.61'
+}
+
+group 'io.bartek'
+version '1.0-SNAPSHOT'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
+    testCompile group: 'junit', name: 'junit', version: '4.12'
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
+compileTestKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}

gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

gradlew

@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$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" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,84 @@
+@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 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"
+
+@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 init
+
+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 init
+
+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
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+: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 %CMD_LINE_ARGS%
+
+: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

settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'smnp'
+

src/main/kotlin/SMNP.kt

@@ -0,0 +1,8 @@
+import dsl.token.tokenizer.DefaultTokenizer
+import interpreter.Interpreter
+import java.io.File
+
+fun main(args: Array<String>) {
+    val interpreter = Interpreter()
+    interpreter.run(File("/home/bartek/Developent/SMNP-Kotlin/examples/adeste.mus"))
+}

src/main/kotlin/data/model/entity/Note.kt

@@ -0,0 +1,17 @@
+package data.model.entity
+
+import data.model.enumeration.Pitch
+
+class Note private constructor(val pitch: Pitch, val octave: Int, val duration: Int, val dot: Boolean) {
+    data class Builder(var pitch: Pitch = Pitch.A, var octave: Int = 4, var duration: Int = 4, var dot: Boolean = false) {
+        fun pitch(pitch: Pitch) = apply { this.pitch = pitch }
+        fun octave(octave: Int) = apply { this.octave = octave }
+        fun duration(duration: Int) = apply { this.duration = duration }
+        fun dot(dot: Boolean) = apply { this.dot = dot }
+        fun build() = Note(pitch, octave, duration, dot)
+    }
+
+    override fun toString(): String {
+        return "${pitch}${octave}:${duration}${if (dot) "d" else ""}"
+    }
+}

src/main/kotlin/data/model/enumeration/Pitch.kt

@@ -0,0 +1,53 @@
+package data.model.enumeration
+
+import java.lang.RuntimeException
+
+enum class Pitch {
+    C, C_S, D, D_S, E, F, F_S, G, G_S, A, A_S, H;
+
+    override fun toString(): String {
+        return when(this) {
+            C -> "C"
+            C_S -> "C#"
+            D -> "D"
+            D_S -> "D#"
+            E -> "E"
+            F -> "F"
+            F_S -> "F#"
+            G -> "G"
+            G_S -> "G#"
+            A -> "A"
+            A_S -> "A#"
+            H -> "H"
+        }
+    }
+
+    companion object {
+        fun parse(symbol: String): Pitch {
+            return when(symbol.toLowerCase()) {
+                "cb" -> H
+                "c" -> C
+                "c#" -> C_S
+                "db" -> C_S
+                "d" -> D
+                "d#" -> D_S
+                "eb" -> D_S
+                "e" ->  E
+                "e#" -> F
+                "fb" -> E
+                "f" -> F
+                "f#" -> F_S
+                "gb" -> F_S
+                "g" -> G
+                "g#" -> G_S
+                "ab" -> G_S
+                "a" -> A
+                "a#" -> A_S
+                "b" -> A_S
+                "h" -> H
+                "h#" -> C
+                else -> throw RuntimeException("Unknown pitch symbol")
+            }
+        }
+    }
+}

src/main/kotlin/dsl/token/model/entity/Token.kt

@@ -0,0 +1,19 @@
+package dsl.token.model.entity
+
+import dsl.token.model.enumeration.TokenType
+
+data class Token(val type: TokenType, val value: Any, val rawValue: String, val position: TokenPosition) {
+    constructor(type: TokenType, value: String, position: TokenPosition): this(type, value, value, position)
+
+    fun mapValue(mapper: (Any) -> Any): Token {
+        return Token(type, mapper(value), rawValue, position)
+    }
+
+    companion object {
+        val NONE = Token(TokenType.NONE, "", TokenPosition.NONE)
+    }
+
+    override fun toString(): String {
+        return "(${type.name.toLowerCase()}, »${rawValue}«, ${position.short()})"
+    }
+}

src/main/kotlin/dsl/token/model/entity/TokenList.kt

@@ -0,0 +1,58 @@
+package dsl.token.model.entity
+
+import java.lang.RuntimeException
+
+class TokenList(val tokens: List<Token>, val lines: List<String>) {
+    private var cursor = 0
+    private var snap = 0
+
+    operator fun get(index: Int): Token {
+        return tokens[index]
+    }
+
+    fun current(): Token {
+        if(!hasCurrent()) {
+            throw RuntimeException("Cursor points to not existing token! Cursor = ${cursor}, length = ${tokens.size}")
+        }
+
+        return tokens[cursor]
+    }
+
+    fun currentPos(): TokenPosition {
+        return current().position
+    }
+
+    fun hasCurrent(): Boolean {
+        return cursor < tokens.size
+    }
+
+    fun hasMore(count: Int = 1): Boolean {
+        return cursor + count < tokens.size
+    }
+
+    fun next(number: Int = 1): Token {
+        return tokens[cursor + number]
+    }
+
+    fun prev(number: Int = 1): Token {
+        return tokens[cursor - number]
+    }
+
+    fun ahead() {
+        cursor += 1
+    }
+
+    fun snapshot(): Int {
+        return cursor
+    }
+
+    fun restore(snapshot: Int) {
+        cursor = snapshot
+    }
+
+    fun reset() {
+        cursor = 0
+    }
+
+
+}

src/main/kotlin/dsl/token/model/entity/TokenPosition.kt

@@ -0,0 +1,15 @@
+package dsl.token.model.entity
+
+data class TokenPosition(val line: Int, val beginCol: Int, val endCol: Int) {
+    companion object {
+        val NONE = TokenPosition(-1, -1, -1)
+    }
+
+    override fun toString(): String {
+        return "[line ${line+1}, col ${beginCol}]"
+    }
+
+    fun short(): String {
+        return "${line+1}:${beginCol}}"
+    }
+}

src/main/kotlin/dsl/token/model/entity/TokenizerOutput.kt

@@ -0,0 +1,29 @@
+package dsl.token.model.entity
+
+import dsl.token.model.enumeration.TokenType
+
+data class TokenizerOutput(val consumedChars: Int, val token: Token) {
+    fun consumed(): Boolean {
+        return consumedChars > 0
+    }
+
+    fun mapToken(mapper: (Token) -> Token): TokenizerOutput {
+        return TokenizerOutput(consumedChars, mapper(token) )
+    }
+
+    companion object {
+        val NONE = TokenizerOutput(0, Token.NONE)
+
+        fun produce(consumedChars: Int, token: Token): TokenizerOutput {
+            return if (consumedChars > 0) TokenizerOutput(consumedChars, token) else NONE
+        }
+
+        fun produce(consumedChars: Int, value: String, tokenType: TokenType, line: Int, beginCol: Int): TokenizerOutput {
+            return produce(consumedChars, Token(tokenType, value, TokenPosition(line, beginCol, beginCol + consumedChars)))
+        }
+
+        fun produce(consumedChars: Int, value: Any, rawValue: String, tokenType: TokenType, line: Int, beginCol: Int): TokenizerOutput {
+            return produce(consumedChars, Token(tokenType, value, rawValue, TokenPosition(line, beginCol, beginCol + consumedChars)))
+        }
+    }
+}

src/main/kotlin/dsl/token/model/enumeration/TokenType.kt

@@ -0,0 +1,49 @@
+package dsl.token.model.enumeration
+
+enum class TokenType(val token: String) {
+    NONE("<NONE>"),
+    RELATION("==, !=, >=, <="),
+    DOUBLE_ASTERISK("**"),
+    OPEN_CURLY("{"),
+    CLOSE_CURLY("}"),
+    OPEN_PAREN("("),
+    CLOSE_PAREN(")"),
+    OPEN_SQUARE("["),
+    CLOSE_SQUARE("]"),
+    OPEN_ANGLE("<"),
+    CLOSE_ANGLE(">"),
+    SEMICOLON(";"),
+    ASTERISK("*"),
+    PERCENT("%"),
+    ASSIGN("="),
+    ARROW("->"),
+    COMMA(","),
+    SLASH("/"),
+    MINUS("-"),
+    PLUS("+"),
+    CARET("^"),
+    DOTS("..."),
+    AMP("&"),
+    DOT("."),
+    AND("and"),
+    OR("or"),
+    NOT("not"),
+    INTEGER("integer"),
+    STRING("string"),
+    FLOAT("float"),
+    NOTE("note"),
+    BOOL("bool"),
+    TYPE("type"),
+    FUNCTION("function"),
+    RETURN("return"),
+    EXTEND("extend"),
+    IMPORT("import"),
+    THROW("throw"),
+    FROM("from"),
+    WITH("with"),
+    ELSE("else"),
+    IF("if"),
+    AS("as"),
+    IDENTIFIER("identifier"),
+    COMMENT("comment")
+}

src/main/kotlin/dsl/token/tokenizer/CommentTokenizer.kt

@@ -0,0 +1,21 @@
+package dsl.token.tokenizer
+
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+
+class CommentTokenizer : Tokenizer {
+    override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+        if (input[current] == '#') {
+            var consumedChars = 0
+            var value = ""
+            while(current + consumedChars < input.length) {
+                value += input[current + consumedChars]
+                consumedChars += 1
+            }
+
+            return TokenizerOutput.produce(consumedChars, value.substring(1).trim(), value, TokenType.COMMENT, line, current)
+        }
+
+        return TokenizerOutput.NONE
+    }
+}

src/main/kotlin/dsl/token/tokenizer/DefaultTokenizer.kt

@@ -0,0 +1,110 @@
+package dsl.token.tokenizer
+
+import dsl.token.model.entity.Token
+import dsl.token.model.entity.TokenList
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+import dsl.token.tokenizer.Tokenizer.Companion.default
+import dsl.token.tokenizer.Tokenizer.Companion.keywords
+import dsl.token.tokenizer.Tokenizer.Companion.mapValue
+import dsl.token.tokenizer.Tokenizer.Companion.regex
+import dsl.token.tokenizer.Tokenizer.Companion.separated
+
+class DefaultTokenizer : Tokenizer {
+    private val tokenizers = listOf(
+        default(TokenType.ARROW),
+
+        // Double-character operators
+        keywords(TokenType.RELATION, "==", "!=", "<=", ">="),
+        default(TokenType.DOUBLE_ASTERISK),
+
+        // Characters
+        default(TokenType.OPEN_CURLY),
+        default(TokenType.CLOSE_CURLY),
+        default(TokenType.OPEN_PAREN),
+        default(TokenType.CLOSE_PAREN),
+        default(TokenType.OPEN_SQUARE),
+        default(TokenType.CLOSE_SQUARE),
+        default(TokenType.OPEN_ANGLE),
+        default(TokenType.CLOSE_ANGLE),
+        default(TokenType.SEMICOLON),
+        default(TokenType.ASTERISK),
+        default(TokenType.PERCENT),
+        default(TokenType.ASSIGN),
+        default(TokenType.COMMA),
+        default(TokenType.SLASH),
+        default(TokenType.MINUS),
+        default(TokenType.PLUS),
+        default(TokenType.CARET),
+        default(TokenType.DOTS),
+        default(TokenType.AMP),
+        default(TokenType.DOT),
+
+        // Types
+        mapValue(separated(FloatTokenizer())) { (it as String).toFloat() },
+        mapValue(separated(regex(TokenType.INTEGER, "\\d"))) { (it as String).toInt() },
+        StringTokenizer(),
+        separated(NoteTokenizer()),
+        mapValue(separated(keywords(TokenType.BOOL, "true", "false"))) { it == "true" },
+
+        // Keywords
+        separated(default(TokenType.FUNCTION)),
+        separated(default(TokenType.RETURN)),
+        separated(default(TokenType.EXTEND)),
+        separated(default(TokenType.IMPORT)),
+        separated(default(TokenType.THROW)),
+        separated(default(TokenType.FROM)),
+        separated(default(TokenType.WITH)),
+        separated(default(TokenType.ELSE)),
+        separated(default(TokenType.AND)),
+        separated(default(TokenType.NOT)),
+        separated(default(TokenType.AS)),
+        separated(default(TokenType.IF)),
+        separated(default(TokenType.OR)),
+
+        // Identifier (couldn't be before keywords!)
+        regex(TokenType.IDENTIFIER, "\\w"),
+
+        // Whitespaces
+        regex(TokenType.NONE, "\\s"),
+
+        // Comments
+        CommentTokenizer()
+    )
+
+    private val filters: List<(Token) -> Boolean> = listOf(
+        { token -> token.type != TokenType.NONE },
+        { token -> token.type != TokenType.COMMENT }
+    )
+
+    private val tokenizer = Tokenizer.firstOf(tokenizers)
+
+    fun tokenize(lines: List<String>): TokenList {
+        val tokens: MutableList<Token> = mutableListOf()
+
+        for ((index, line) in lines.withIndex()) {
+            var current = 0
+            while (current < line.length) {
+                val output = tokenize(line, current, index)
+
+                if (!output.consumed()) {
+                    throw RuntimeException("Unknown symbol ${line[current]}")
+                }
+
+                current += output.consumedChars
+                tokens.add(output.token)
+            }
+        }
+
+        val filteredTokens = filterTokens(tokens.toList())
+        return TokenList(filteredTokens, lines)
+    }
+
+    private fun filterTokens(tokens: List<Token>): List<Token> {
+        return tokens.filter { token -> filters.all { filter -> filter(token) } }
+    }
+
+    override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+        return tokenizer.tokenize(input, current, line)
+    }
+}

src/main/kotlin/dsl/token/tokenizer/FloatTokenizer.kt

@@ -0,0 +1,16 @@
+package dsl.token.tokenizer
+
+import dsl.token.model.entity.Token
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+
+class FloatTokenizer : Tokenizer {
+    override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+        return Tokenizer.combined(
+            { values, tokenPosition -> Token(TokenType.FLOAT, values.joinToString(""), tokenPosition) },
+            Tokenizer.regex(TokenType.NONE, "\\d"),
+            Tokenizer.keyword(TokenType.NONE, "."),
+            Tokenizer.regex(TokenType.NONE, "\\d")
+        ).tokenize(input, current, line)
+    }
+}

src/main/kotlin/dsl/token/tokenizer/NoteTokenizer.kt

@@ -0,0 +1,76 @@
+package dsl.token.tokenizer
+
+import data.model.entity.Note
+import data.model.enumeration.Pitch
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+
+class NoteTokenizer : Tokenizer {
+    override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+        var consumedChars = 0
+        var notePitch: String
+        var octave: Int? = null
+        var duration: String? = null
+        var dot = false
+        var rawValue = ""
+
+        // Note literal start symbol
+        if(input[current] == '@') {
+            rawValue += input[current+consumedChars]
+            consumedChars += 1
+
+            // Note basic pitch
+            if(listOf('c', 'd', 'e', 'f', 'g', 'a', 'h').contains(input[current+consumedChars].toLowerCase())) {
+                rawValue += input[current+consumedChars]
+                notePitch = input[current+consumedChars].toString()
+                consumedChars += 1
+
+                // Flat or sharp
+                if(current+consumedChars < input.length && listOf('b', '#').contains(input[current+consumedChars])) {
+                    rawValue += input[current+consumedChars]
+                    notePitch += input[current+consumedChars]
+                    consumedChars += 1
+                }
+
+                // Octave
+                if(current+consumedChars < input.length && "\\d".toRegex().matches(input[current+consumedChars].toString())) {
+                    rawValue += input[current+consumedChars]
+                    octave = input[current+consumedChars].toString().toInt()
+                    consumedChars += 1
+                }
+
+                // Duration start symbol
+                if(current+consumedChars < input.length && input[current+consumedChars] == ':') {
+                    rawValue += input[current+consumedChars]
+                    duration = ""
+                    consumedChars += 1
+                    while(current+consumedChars < input.length && "\\d".toRegex().matches(input[current+consumedChars].toString())) {
+                        rawValue += input[current+consumedChars]
+                        duration += input[current+consumedChars]
+                        consumedChars += 1
+                    }
+
+                    if(duration.isEmpty()) {
+                        return TokenizerOutput.NONE
+                    }
+                    dot = (current+consumedChars < input.length && input[current+consumedChars] == 'd')
+
+                    if(dot) {
+                        rawValue += input[current+consumedChars]
+                        consumedChars += 1
+                    }
+                }
+
+                val note = Note.Builder()
+                    .pitch(Pitch.parse(notePitch))
+                    .dot(dot)
+                octave?.let { note.octave(it) }
+                duration?.let { note.duration(it.toInt()) }
+
+                return TokenizerOutput.produce(consumedChars, note.build(), rawValue, TokenType.NOTE, line, current)
+            }
+        }
+
+        return TokenizerOutput.NONE
+    }
+}

src/main/kotlin/dsl/token/tokenizer/StringTokenizer.kt

@@ -0,0 +1,24 @@
+package dsl.token.tokenizer
+
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+
+class StringTokenizer : Tokenizer {
+    override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+        if(input[current] == '"') {
+            var value = input[current].toString()
+            var consumedChars = 1
+            while(input.length > current + consumedChars && input[current+consumedChars] != '"') {
+                value += input[current + consumedChars]
+                consumedChars += 1
+            }
+
+            value += input[current + consumedChars]
+            consumedChars += 1
+
+            return TokenizerOutput.produce(consumedChars, value.substring(1, value.length-1), value, TokenType.STRING, line, current)
+        }
+
+        return TokenizerOutput.NONE
+    }
+}

src/main/kotlin/dsl/token/tokenizer/Tokenizer.kt

@@ -0,0 +1,152 @@
+package dsl.token.tokenizer
+
+import dsl.token.model.entity.Token
+import dsl.token.model.entity.TokenPosition
+import dsl.token.model.entity.TokenizerOutput
+import dsl.token.model.enumeration.TokenType
+
+interface Tokenizer {
+    fun tokenize(input: String, current: Int, line: Int): TokenizerOutput
+
+    companion object {
+        // Char regex
+        fun regex(type: TokenType, pattern: String): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    var consumedChars = 0
+                    var value = ""
+
+                    while (current + consumedChars < input.length && pattern.toRegex().matches(input[current + consumedChars].toString())) {
+                        value += input[current + consumedChars]
+                        consumedChars += 1
+                    }
+
+                    return TokenizerOutput.produce(consumedChars, value, type, line, current)
+                }
+            }
+        }
+
+        // Literal keyword ("function", "or", ".")
+        fun keyword(type: TokenType, keyword: String): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    if ((input.length >= current + keyword.length) && (input.substring(
+                            current,
+                            current + keyword.length
+                        ) == keyword)
+                    ) {
+                        return TokenizerOutput.produce(keyword.length, keyword, type, line, current)
+                    }
+
+                    return TokenizerOutput.NONE
+                }
+            }
+        }
+
+        // One of keywords
+        fun keywords(type: TokenType, vararg keywords: String): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    for (keyword in keywords) {
+                        val output = keyword(type, keyword).tokenize(input, current, line)
+                        if (output.consumed()) {
+                            return output
+                        }
+                    }
+
+                    return TokenizerOutput.NONE
+                }
+
+            }
+        }
+
+        // Token for regular TokenType
+        fun default(type: TokenType): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    return keyword(type, type.token).tokenize(input, current, line)
+                }
+
+            }
+        }
+
+        // Isolate dsl.token (for example "function" | "functions" | "function s")
+        fun separated(tokenizer: Tokenizer, end: String = "\\W"): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    val output = tokenizer.tokenize(input, current, line)
+                    if (output.consumed()) {
+                        if ((input.length > current + output.consumedChars) && end.toRegex().matches(input[current + output.consumedChars].toString())) {
+                            return output
+                        }
+
+                        if ((input.length == current + output.consumedChars)) {
+                            return output
+                        }
+                    }
+
+                    return TokenizerOutput.NONE
+                }
+
+            }
+        }
+
+        // Change dsl.token value (rawValue will be kept)
+        fun mapValue(tokenizer: Tokenizer, mapper: (Any) -> Any): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    val output = tokenizer.tokenize(input, current, line)
+                    if(output.consumed()) {
+                        return output.mapToken { output.token.mapValue(mapper) }
+                    }
+
+                    return TokenizerOutput.NONE
+                }
+            }
+        }
+
+        // Complex tokenizer consisting of smaller ones (like "3.14" = regex(\d) + keyword(.) + regex(\d))
+        fun combined(createToken: (List<String>, TokenPosition) -> Token, vararg tokenizers: Tokenizer): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    var consumedChars = 0
+                    val tokens: MutableList<Token> = mutableListOf()
+
+                    for(tokenizer in tokenizers) {
+                        val output = tokenizer.tokenize(input, current + consumedChars, line)
+                        if(output.consumed()) {
+                            consumedChars += output.consumedChars
+                            tokens.add(output.token)
+                        } else {
+                            return TokenizerOutput.NONE
+                        }
+                    }
+
+                    if(consumedChars == 0) {
+                        return TokenizerOutput.NONE
+                    }
+
+                    return TokenizerOutput.produce(consumedChars, createToken(tokens.map { it.rawValue }, TokenPosition(line, tokens.first().position.beginCol, tokens.last().position.endCol)))
+                }
+
+            }
+        }
+
+        // First matched tokenizer
+        fun firstOf(tokenizers: List<Tokenizer>): Tokenizer {
+            return object : Tokenizer {
+                override fun tokenize(input: String, current: Int, line: Int): TokenizerOutput {
+                    for (tokenizer in tokenizers) {
+                        val output = tokenizer.tokenize(input, current, line)
+                        if(output.consumed()) {
+                            return output
+                        }
+                    }
+
+                    return TokenizerOutput.NONE
+                }
+
+            }
+        }
+    }
+}

src/main/kotlin/interpreter/Interpreter.kt

@@ -0,0 +1,22 @@
+package interpreter
+
+import dsl.token.tokenizer.DefaultTokenizer
+import java.io.BufferedInputStream
+import java.io.File
+import java.io.FileInputStream
+
+class Interpreter {
+    fun run(code: String) {
+        val tokenizer = DefaultTokenizer()
+        val lines = code.split("\n")
+        val tokens = tokenizer.tokenize(lines)
+        println(tokens)
+    }
+
+    fun run(file: File) {
+        val tokenizer = DefaultTokenizer()
+        val lines = file.readLines()
+        val tokens = tokenizer.tokenize(lines)
+        println(tokens)
+    }
+}