.gitignore

@@ -1,2 +0,0 @@
-.idea/
-target/

README.md

@@ -1,4 +1,4 @@
 # gombaila
 
-Let's write a compiler in Java!
+Let's write a compiler in Java!
-Inspired by Pixeled: https://www.youtube.com/watch?v=vcSijrRsrY0.
+Inspired by Pixeled: https://www.youtube.com/watch?v=vcSijrRsrY0.

pom.xml

@@ -1,63 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-
-    <parent>
-        <groupId>ch.fritteli</groupId>
-        <artifactId>fritteli-build-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
-    </parent>
-
-    <groupId>ch.fritteli.gombaila</groupId>
-    <artifactId>gombaila</artifactId>
-    <version>0.0.1-SNAPSHOT</version>
-
-    <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
-
-    <dependencies>
-        <dependency>
-            <groupId>io.vavr</groupId>
-            <artifactId>vavr</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.jetbrains</groupId>
-            <artifactId>annotations</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-api</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-        </dependency>
-    </dependencies>
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <configuration>
-                    <source>21</source>
-                    <target>21</target>
-                </configuration>
-            </plugin>
-        </plugins>
-    </build>
-</project>

src/main/java/ch/fritteli/gombaila/ElementWalker.java

@@ -1,39 +0,0 @@
-package ch.fritteli.gombaila;
-
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.function.BiFunction;
-import java.util.function.BiPredicate;
-
-public class ElementWalker<T, E> {
-    @NotNull
-    private final T back;
-    @NotNull
-    private final BiPredicate<T, Integer> hasNextPredicate;
-    @NotNull
-    private final BiFunction<T, Integer, E> atFunction;
-    private int index = 0;
-
-    public ElementWalker(@NotNull final T back,
-                         @NotNull final BiPredicate<T, Integer> hasNextPredicate,
-                         @NotNull final BiFunction<T, Integer, E> atFunction) {
-        this.back = back;
-        this.hasNextPredicate = hasNextPredicate;
-        this.atFunction = atFunction;
-    }
-
-    public boolean hasNext() {
-        return this.hasNextPredicate.test(this.back, this.index);
-    }
-
-    @NotNull
-    public E next() {
-        return this.atFunction.apply(this.back, this.index++);
-    }
-
-    @NotNull
-    public Option<E> peekNext() {
-        return Option.when(this.hasNext(), () -> this.atFunction.apply(this.back, this.index));
-    }
-}

src/main/java/ch/fritteli/gombaila/GombailaMain.java

@@ -1,30 +0,0 @@
-package ch.fritteli.gombaila;
-
-import ch.fritteli.gombaila.domain.common.NodeProg;
-import ch.fritteli.gombaila.domain.common.Token;
-import ch.fritteli.gombaila.domain.generator.Generator;
-import ch.fritteli.gombaila.domain.lexer.Lexer;
-import ch.fritteli.gombaila.domain.parser.Parser;
-import io.vavr.collection.Stream;
-import org.jetbrains.annotations.NotNull;
-
-import java.io.IOException;
-import java.net.URISyntaxException;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Paths;
-
-public class GombailaMain {
-    public static void main(@NotNull final String[] args) throws URISyntaxException, IOException {
-        final String string = Files.readString(Paths.get(Lexer.class.getClassLoader().getResource("gombaila/simple.gb").toURI()));
-        final Lexer lexer = new Lexer(string);
-        final Stream<Token> tokens = lexer.lex();
-        System.out.println("TOKENS:\n" + tokens.mkString("\n"));
-        final Parser parser = new Parser(tokens);
-        final NodeProg nodeProg = parser.parse();
-        System.out.println("STMTS:\n" + nodeProg.stmts().mkString("\n"));
-        final Generator generator = new Generator(nodeProg);
-        final String asm = generator.generate();
-        Files.writeString(Paths.get("./target/simple.asm"), asm, StandardCharsets.UTF_8);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/SeqWalker.java

@@ -1,15 +0,0 @@
-package ch.fritteli.gombaila.domain;
-
-import ch.fritteli.gombaila.ElementWalker;
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-
-public class SeqWalker<E> extends ElementWalker<Seq<E>, E> {
-    public SeqWalker(@NotNull final Seq<E> seq) {
-        super(
-                seq,
-                (back, index) -> index < back.length(),
-                Seq::get
-        );
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/common/Node.java

@@ -1,4 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-public sealed interface Node permits NodeExpr, NodeProg, NodeStmt {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExpr.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-public sealed interface NodeBinExpr extends NodeExpr
-        permits NodeBinExprAdd, NodeBinExprDiv, NodeBinExprExp, NodeBinExprMinus, NodeBinExprMod, NodeBinExprMult {
-
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprAdd.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprAdd(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprDiv.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprDiv(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprExp.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprExp(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprMinus.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprMinus(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprMod.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprMod(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeBinExprMult.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeBinExprMult(@NotNull NodeExpr lhs, @NotNull NodeExpr rhs) implements NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeExpr.java

@@ -1,4 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-public sealed interface NodeExpr extends Node permits NodeExprIdent, NodeExprIntLit, NodeBinExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeExprIdent.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeExprIdent(@NotNull Token ident) implements NodeExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeExprIntLit.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeExprIntLit(@NotNull Token value) implements NodeExpr {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeProg.java

@@ -1,7 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-
-public record NodeProg(@NotNull Seq<NodeStmt> stmts) implements Node {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmt.java

@@ -1,4 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-public sealed interface NodeStmt extends Node permits NodeStmtAssign, NodeStmtExit, NodeStmtIf, NodeStmtIfElse, NodeStmtLet, NodeStmtPrint, NodeStmtScope {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtAssign.java

@@ -1,7 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtAssign(@NotNull Token ident, @NotNull NodeExpr expr) implements NodeStmt {
-
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtExit.java

@@ -1,7 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtExit(@NotNull NodeExpr expr) implements NodeStmt {
-
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtIf.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtIf(@NotNull NodeExpr expr, @NotNull NodeStmtScope ifScope) implements NodeStmt {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtIfElse.java

@@ -1,7 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtIfElse(@NotNull NodeExpr expr, @NotNull NodeStmtScope ifScope,
-                             @NotNull NodeStmtScope elseScope) implements NodeStmt {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtLet.java

@@ -1,7 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtLet(@NotNull NodeStmtAssign stmtAssign) implements NodeStmt {
-
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtPrint.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtPrint(@NotNull NodeExpr nodeExpr) implements NodeStmt {
-}

src/main/java/ch/fritteli/gombaila/domain/common/NodeStmtScope.java

@@ -1,8 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-
-public record NodeStmtScope(@NotNull Seq<NodeStmt> stmts) implements NodeStmt {
-
-}

src/main/java/ch/fritteli/gombaila/domain/common/Token.java

@@ -1,10 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NotNull;
-
-public record Token(@NotNull TokenType type, @NotNull Option<Object> value, int line, int column) {
-    public Token(@NotNull final TokenType type, final int line, final int column) {
-        this(type, Option.none(), line, column);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/common/TokenType.java

@@ -1,55 +0,0 @@
-package ch.fritteli.gombaila.domain.common;
-
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NotNull;
-
-public enum TokenType {
-    // Keywords
-    LET,
-    EXIT,
-    PRINT,
-    // special characters
-    SEMI,
-    OPEN_PAREN,
-    CLOSE_PAREN,
-    OPEN_CURLY,
-    CLOSE_CURLY,
-    EQUALS,
-    PLUS,
-    MINUS,
-    MULT,
-    DIV,
-    MOD,
-    EXP,
-    // literals, identifiers
-    INT_LIT,
-    IDENTIFIER,
-    // the rest
-    WHITESPACE,
-    IF,
-    ELSE;
-
-    @NotNull
-    public Option<Integer> precedence() {
-        return Option.of(switch (this) {
-            case PLUS, MINUS -> 1;
-            case MULT, DIV, MOD -> 2;
-            case EXP -> 3;
-            default -> null;
-        });
-    }
-
-    @NotNull
-    public Option<Associativity> associativity() {
-        return Option.of(switch (this) {
-            case PLUS, MINUS, MULT, DIV, MOD -> Associativity.LEFT;
-            case EXP -> Associativity.RIGHT;
-            default -> null;
-        });
-    }
-
-    public enum Associativity {
-        LEFT,
-        RIGHT
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/generator/ExprVisitor.java

@@ -1,100 +0,0 @@
-package ch.fritteli.gombaila.domain.generator;
-
-import ch.fritteli.gombaila.domain.common.NodeBinExprAdd;
-import ch.fritteli.gombaila.domain.common.NodeBinExprDiv;
-import ch.fritteli.gombaila.domain.common.NodeBinExprExp;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMinus;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMod;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMult;
-import ch.fritteli.gombaila.domain.common.NodeExpr;
-import ch.fritteli.gombaila.domain.common.NodeExprIdent;
-import ch.fritteli.gombaila.domain.common.NodeExprIntLit;
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NotNull;
-
-final class ExprVisitor {
-    @NotNull
-    private final Generator generator;
-
-    ExprVisitor(@NotNull final Generator generator) {
-        this.generator = generator;
-    }
-
-    void visit(@NotNull final NodeExpr expr) {
-        switch (expr) {
-            case final NodeExprIdent exprIdent -> visit(exprIdent);
-            case final NodeExprIntLit exprIntLit -> visit(exprIntLit);
-            case final NodeBinExprAdd exprAdd -> visit(exprAdd);
-            case final NodeBinExprMinus exprMinus -> visit(exprMinus);
-            case final NodeBinExprMult exprMult -> visit(exprMult);
-            case final NodeBinExprDiv exprDiv -> visit(exprDiv);
-            case final NodeBinExprMod exprMod -> visit(exprMod);
-            case final NodeBinExprExp exprExp -> visit(exprExp);
-        }
-    }
-
-    private void visit(@NotNull final NodeExprIdent expr) {
-        final String varName = (String) expr.ident().value().get();
-        final Option<Variable> variable = this.generator.vars.find(var -> var.name().equals(varName));
-
-        if (variable.isEmpty()) {
-            throw new GeneratorException("Undeclared identifier: %s".formatted(varName), expr);
-        }
-
-        generator.push("qword [rsp+%d]".formatted(8 * (this.generator.stackSize - variable.get().stackLocation() - 1)));
-    }
-
-    private void visit(@NotNull final NodeExprIntLit expr) {
-        this.generator.printer.commentedLine("store the value in rax", "mov", "rax, %s".formatted(expr.value().value().get()));
-        generator.push("rax");
-    }
-
-    private void visit(@NotNull final NodeBinExprAdd expr) {
-        generator.generateExpr(expr.lhs());
-        generator.generateExpr(expr.rhs());
-        generator.pop("rbx");
-        generator.pop("rax");
-        generator.printer.commentedLine("add rbx to rax", "add", "rax, rbx");
-        generator.push("rax");
-    }
-
-    private void visit(@NotNull final NodeBinExprMinus expr) {
-        generator.generateExpr(expr.lhs());
-        generator.generateExpr(expr.rhs());
-        generator.pop("rbx");
-        generator.pop("rax");
-        generator.printer.commentedLine("subtract rbx from rax", "sub", "rax, rbx");
-        generator.push("rax");
-    }
-
-    private void visit(@NotNull final NodeBinExprMult expr) {
-        generator.generateExpr(expr.lhs());
-        generator.generateExpr(expr.rhs());
-        generator.pop("rbx");
-        generator.pop("rax");
-        generator.printer.commentedLine("multiply rax by rbx", "mul", "rbx");
-        generator.push("rax");
-    }
-
-    private void visit(@NotNull final NodeBinExprDiv expr) {
-        generator.generateExpr(expr.lhs());
-        generator.generateExpr(expr.rhs());
-        generator.pop("rbx");
-        generator.pop("rax");
-        generator.printer.commentedLine("divide rax by rbx", "div", "rbx");
-        generator.push("rax");
-    }
-
-    private void visit(@NotNull final NodeBinExprMod expr) {
-        generator.generateExpr(expr.lhs());
-        generator.generateExpr(expr.rhs());
-        generator.pop("rbx");
-        generator.pop("rax");
-        generator.printer.commentedLine("divide rax by rbx. The remainder will be in rdx.", "div", "rbx");
-        generator.push("rdx");
-    }
-
-    private void visit(@NotNull final NodeBinExprExp expr) {
-        throw new GeneratorException("Not yet implemented!", expr);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/generator/Generator.java

@@ -1,101 +0,0 @@
-package ch.fritteli.gombaila.domain.generator;
-
-import ch.fritteli.gombaila.domain.common.NodeExpr;
-import ch.fritteli.gombaila.domain.common.NodeProg;
-import ch.fritteli.gombaila.domain.common.NodeStmt;
-import ch.fritteli.gombaila.domain.printer.Printer;
-import io.vavr.collection.List;
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-
-import java.time.ZonedDateTime;
-import java.util.Stack;
-
-public class Generator {
-    @NotNull
-    final Printer printer = new Printer();
-    @NotNull
-    final Stack<Integer> scopes = new Stack<>();
-    @NotNull
-    private final NodeProg nodeProg;
-    @NotNull
-    private final ExprVisitor exprVisitor;
-    @NotNull
-    private final StmtVisitor stmtVisitor;
-    @NotNull
-    Seq<Variable> vars = List.empty();
-    int stackSize = 0;
-
-    public Generator(@NotNull final NodeProg nodeProg) {
-        this.nodeProg = nodeProg;
-        this.exprVisitor = new ExprVisitor(this);
-        this.stmtVisitor = new StmtVisitor(this);
-    }
-
-    @NotNull
-    public String generate() {
-        this.generateHeader();
-
-        for (final NodeStmt stmt : this.nodeProg.stmts()) {
-            this.generateStmt(stmt);
-        }
-
-        this.generateFooter();
-
-        return this.printer.toString();
-    }
-
-    private void generateHeader() {
-        this.printer.comment("Program generated by Gombaila on %1$tF, %1$tT".formatted(ZonedDateTime.now()));
-        this.printer.section(".data");
-        this.printer.line("EXIT_SUCCESS", "equ", 0);
-        this.printer.line("SYSCALL_exit", "equ", 60);
-        this.printer.blank();
-        this.printer.section(".text");
-        this.printer.rawLine("global _start");
-        this.printer.blank();
-        this.printer.label("_start");
-    }
-
-    private void generateFooter() {
-        this.printer.commentedLine("Prepare for successful exit", "mov", "rdi, EXIT_SUCCESS");
-        this.printer.commentedLine("Jump to the default exit routine", "jmp", "exit");
-        this.printer.blank();
-        this.printer.label("exit");
-        this.printer.commentedLine("Prepare for the EXIT syscall", "mov", "rax, SYSCALL_exit");
-        this.printer.line("syscall");
-    }
-
-    void generateStmt(@NotNull final NodeStmt stmt) {
-        this.stmtVisitor.visit(stmt);
-    }
-
-    void generateExpr(@NotNull final NodeExpr expr) {
-        this.exprVisitor.visit(expr);
-    }
-
-    void push(@NotNull final String reg) {
-        this.printer.commentedLine("push %s onto top of the stack".formatted(reg), "push", reg);
-        this.stackSize++;
-    }
-
-    void pop(@NotNull final String reg) {
-        this.printer.commentedLine("pop top of the stack into %s".formatted(reg), "pop", reg);
-        this.stackSize--;
-    }
-
-    void beginScope() {
-        this.scopes.push(this.vars.size());
-    }
-
-    void endScope() {
-        final int popCount = this.vars.size() - this.scopes.pop();
-        if (popCount > 0) {
-            this.printer.commentedLine(
-                    "Reset the stack pointer to discard out-of-scope variables",
-                    "add", "rsp, %d".formatted(popCount * 8));
-            this.stackSize -= popCount;
-        }
-        this.vars = this.vars.dropRight(popCount);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/generator/GeneratorException.java

@@ -1,23 +0,0 @@
-package ch.fritteli.gombaila.domain.generator;
-
-import ch.fritteli.gombaila.domain.common.Node;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-public class GeneratorException extends RuntimeException {
-    @NotNull
-    private final Node node;
-
-    public GeneratorException(@Nullable final String s, @NotNull final Node node) {
-        super(s);
-        this.node = node;
-    }
-
-    @Override
-    public String getMessage() {
-        return "Generator error at node '%s': %s".formatted(
-                this.node.getClass().getSimpleName(),
-                super.getMessage()
-        );
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/generator/StmtVisitor.java

@@ -1,131 +0,0 @@
-package ch.fritteli.gombaila.domain.generator;
-
-import ch.fritteli.gombaila.domain.common.NodeStmt;
-import ch.fritteli.gombaila.domain.common.NodeStmtAssign;
-import ch.fritteli.gombaila.domain.common.NodeStmtExit;
-import ch.fritteli.gombaila.domain.common.NodeStmtIf;
-import ch.fritteli.gombaila.domain.common.NodeStmtIfElse;
-import ch.fritteli.gombaila.domain.common.NodeStmtLet;
-import ch.fritteli.gombaila.domain.common.NodeStmtPrint;
-import ch.fritteli.gombaila.domain.common.NodeStmtScope;
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NotNull;
-
-final class StmtVisitor {
-    @NotNull
-    private final Generator generator;
-    private int labelCounter = 0;
-
-    StmtVisitor(@NotNull final Generator generator) {
-        this.generator = generator;
-    }
-
-    void visit(@NotNull final NodeStmt stmt) {
-        switch (stmt) {
-            case final NodeStmtLet stmtLet -> visit(stmtLet);
-            case final NodeStmtAssign stmtAssign -> visit(stmtAssign);
-            case final NodeStmtExit stmtExit -> visit(stmtExit);
-            case final NodeStmtPrint stmtPrint -> visit(stmtPrint);
-            case final NodeStmtScope stmtScope -> visit(stmtScope);
-            case final NodeStmtIf stmtIf -> visit(stmtIf);
-            case final NodeStmtIfElse stmtIfElse -> visit(stmtIfElse);
-        }
-    }
-
-    private void visit(@NotNull final NodeStmtLet stmt) {
-        final String varName = (String) stmt.stmtAssign().ident().value().get();
-        if (this.generator.vars.exists(var -> var.name().equals(varName))) {
-            throw new GeneratorException("Identifier already used: %s".formatted(varName), stmt);
-        }
-
-        this.generator.vars = this.generator.vars.append(new Variable(varName, generator.stackSize));
-
-        this.generator.generateExpr(stmt.stmtAssign().expr());
-    }
-
-    private void visit(@NotNull final NodeStmtAssign stmt) {
-        final String varName = (String) stmt.ident().value().get();
-        final Option<Variable> variable = this.generator.vars.find(var -> var.name().equals(varName));
-        if (variable.isEmpty()) {
-            throw new GeneratorException("Undeclared identifier: %s".formatted(varName), stmt);
-        }
-
-        final int stackLocation = variable.get().stackLocation();
-        final int targetLocation = 8 * (this.generator.stackSize - stackLocation - 1);
-        this.generator.generateExpr(stmt.expr());
-        this.generator.pop("rbx");
-        this.generator.printer.commentedLine(
-                "Overwrite the old value of %s in the stack",
-                "mov",
-                "[rsp+%d], rbx".formatted(targetLocation)
-        );
-    }
-
-    private void visit(@NotNull final NodeStmtExit stmt) {
-        this.generator.generateExpr(stmt.expr());
-        this.generator.pop("rdi");
-        this.generator.printer.commentedLine("Jump to the default exit routine", "jmp", "exit");
-    }
-
-    private void visit(@NotNull final NodeStmtPrint stmt) {
-//            generateExpr(stmt.nodeExpr());
-//            // rdx: length of output
-//            line("mov rdx, 8");
-//            // rsi: output
-//            pop("rsi");
-//            // rdi: fd-value (STDOUT=1)
-//            line("mov rdi, 1");
-//            // rax: syscall (SYS_WRITE=1)
-//            line("mov rax, 1");
-//            // syscall
-//            line("syscall");
-        throw new GeneratorException("Not implemented yet", stmt);
-    }
-
-    private void visit(@NotNull final NodeStmtScope stmt) {
-        this.generator.beginScope();
-        stmt.stmts().forEach(this.generator::generateStmt);
-        this.generator.endScope();
-    }
-
-    private void visit(@NotNull final NodeStmtIf stmt) {
-        final String label = this.createNextLabel();
-        this.generator.generateExpr(stmt.expr());
-        this.generator.pop("rax");
-        this.generator.printer.commentedLine("test the condition",
-                "test", "rax, rax");
-        this.generator.printer.commentedLine(
-                "skip to %s if condition is not met".formatted(label),
-                "jz", label
-        );
-        this.visit(stmt.ifScope());
-        this.generator.printer.label(label);
-    }
-
-    private void visit(@NotNull final NodeStmtIfElse stmt) {
-        final String afterIfLabel = this.createNextLabel();
-        final String afterElseLabel = this.createNextLabel();
-        this.generator.generateExpr(stmt.expr());
-        this.generator.pop("rax");
-        this.generator.printer.commentedLine("test the condition",
-                "test", "rax, rax");
-        this.generator.printer.commentedLine(
-                "skip to %s (else) if condition is not met".formatted(afterIfLabel),
-                "jz", afterIfLabel
-        );
-        this.visit(stmt.ifScope());
-        this.generator.printer.commentedLine(
-                "skip to %s to skip the else".formatted(afterElseLabel),
-                "jmp",
-                afterElseLabel
-        );
-        this.generator.printer.label(afterIfLabel);
-        this.visit(stmt.elseScope());
-        this.generator.printer.label(afterElseLabel);
-    }
-
-    @NotNull
-    private String createNextLabel() {
-        return "label" + (this.labelCounter++);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/generator/Variable.java

@@ -1,6 +0,0 @@
-package ch.fritteli.gombaila.domain.generator;
-
-import org.jetbrains.annotations.NotNull;
-
-record Variable(@NotNull String name, int stackLocation) {
-}

src/main/java/ch/fritteli/gombaila/domain/lexer/Lexer.java

@@ -1,153 +0,0 @@
-package ch.fritteli.gombaila.domain.lexer;
-
-import ch.fritteli.gombaila.domain.common.Token;
-import ch.fritteli.gombaila.domain.common.TokenType;
-import io.vavr.Predicates;
-import io.vavr.collection.Stream;
-import io.vavr.control.Option;
-import org.jetbrains.annotations.NonNls;
-import org.jetbrains.annotations.NotNull;
-
-public class Lexer {
-    @NotNull
-    private final StringWalker content;
-    @NotNull
-    private Stream<Token> tokens = Stream.empty();
-
-    public Lexer(@NotNull final String input) {
-        this.content = new StringWalker(input);
-    }
-
-    @NonNls
-    public Stream<Token> lex() {
-        Option<Character> next;
-        while ((next = this.content.peekNext()).isDefined()) {
-            final char c = next.get();
-            final int line = this.content.line();
-            final int column = this.content.column();
-            if (Character.isAlphabetic(c) || c == '_') {
-                this.handleAlphabeticOrUnderscore(line, column);
-            } else if (Character.isDigit(c)) {
-                this.handleDigit(line, column);
-            } else if (Character.isWhitespace(c)) {
-                this.handleWhitespace(line, column);
-            } else if (c == ';') {
-                this.handleSimple(TokenType.SEMI, line, column);
-            } else if (c == '(') {
-                this.handleSimple(TokenType.OPEN_PAREN, line, column);
-            } else if (c == ')') {
-                this.handleSimple(TokenType.CLOSE_PAREN, line, column);
-            } else if (c == '{') {
-                this.handleSimple(TokenType.OPEN_CURLY, line, column);
-            } else if (c == '}') {
-                this.handleSimple(TokenType.CLOSE_CURLY, line, column);
-            } else if (c == '=') {
-                this.handleSimple(TokenType.EQUALS, line, column);
-            } else if (c == '+') {
-                this.handleSimple(TokenType.PLUS, line, column);
-            } else if (c == '-') {
-                this.handleSimple(TokenType.MINUS, line, column);
-            } else if (c == '*') {
-                this.handleSimple(TokenType.MULT, line, column);
-            } else if (c == '/') {
-                this.handleForwardSlash(line, column);
-            } else if (c == '%') {
-                this.handleSimple(TokenType.MOD, line, column);
-            } else if (c == '^') {
-                this.handleSimple(TokenType.EXP, line, column);
-            } else {
-                throw this.error(c, line, column);
-            }
-        }
-        return this.tokens;
-    }
-
-    private LexerException error(final char c, final int line, final int column) {
-        return new LexerException("Error parsing input: Unexpected character '%c'.".formatted(c), line, column);
-    }
-
-    private void handleAlphabeticOrUnderscore(final int line, final int column) {
-        final StringBuilder s = new StringBuilder();
-        while (this.content.peekNext().exists(Predicates.<Character>anyOf(
-                Character::isAlphabetic,
-                Character::isDigit,
-                c -> c == '_'
-        ))) {
-            s.append(this.content.next());
-        }
-        switch (s.toString()) {
-            case "exit" -> this.appendToken(new Token(TokenType.EXIT, line, column));
-            case "let" -> this.appendToken(new Token(TokenType.LET, line, column));
-            case "print" -> this.appendToken(new Token(TokenType.PRINT, line, column));
-            case "if" -> this.appendToken(new Token(TokenType.IF, line, column));
-            case "else" -> this.appendToken(new Token(TokenType.ELSE, line, column));
-            case final String value ->
-                    this.appendToken(new Token(TokenType.IDENTIFIER, Option.of(value), line, column));
-        }
-    }
-
-    private void handleDigit(final int line, final int column) {
-        final StringBuilder s = new StringBuilder();
-        while (this.content.peekNext().exists(Character::isDigit)) {
-            s.append(this.content.next());
-        }
-        this.appendToken(new Token(TokenType.INT_LIT, Option.of(Long.parseLong(s.toString())), line, column));
-    }
-
-    private void handleWhitespace(final int line, final int column) {
-        final StringBuilder s = new StringBuilder();
-        while (this.content.peekNext().exists(Character::isWhitespace)) {
-            s.append(this.content.next());
-        }
-        this.appendToken(new Token(TokenType.WHITESPACE, Option.of(s.toString()), line, column));
-    }
-
-    private void handleSimple(@NotNull final TokenType tokenType, final int line, final int column) {
-        this.content.next();
-        this.appendToken(new Token(tokenType, line, column));
-    }
-
-    private void handleForwardSlash(final int line, final int column) {
-        this.content.next();
-        if (this.content.peekNext().exists(n -> n == '/')) {
-            this.content.next();
-            this.handleLineComment();
-        }
-        if (this.content.peekNext().exists(n -> n == '*')) {
-            this.content.next();
-            this.handleBlockComment();
-        } else {
-            this.tokens.append(new Token(TokenType.DIV, line, column));
-        }
-    }
-
-    private void handleLineComment() {
-        while (this.content.peekNext().exists(next -> next != '\n')) {
-            this.content.next();
-        }
-        if (this.content.peekNext().exists(next -> next == '\n')) {
-            this.content.next();
-        }
-    }
-
-    private void handleBlockComment() {
-        // ...*/
-        while (this.content.peekNext().exists(next -> next != '*')) {
-            this.content.next();
-        }
-        if (this.content.peekNext().exists(n -> n == '*')) {
-            this.content.next();
-            if (this.content.peekNext().exists(n -> n == '/')) {
-                this.content.next();
-                return;
-            }
-            handleBlockComment();
-        } else {
-            return;
-        }
-    }
-
-    private void appendToken(@NotNull final Token token) {
-        this.tokens = this.tokens.append(token);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/lexer/LexerException.java

@@ -1,23 +0,0 @@
-package ch.fritteli.gombaila.domain.lexer;
-
-import org.jetbrains.annotations.Nullable;
-
-public class LexerException extends RuntimeException {
-    private final int lineNumber;
-    private final int colNumber;
-
-    public LexerException(@Nullable final String s, final int line, final int column) {
-        super(s);
-        this.lineNumber = line;
-        this.colNumber = column;
-    }
-
-    @Override
-    public String getMessage() {
-        return "Lexer error at line %d, position %d: %s".formatted(
-                this.lineNumber,
-                this.colNumber,
-                super.getMessage()
-        );
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/lexer/StringWalker.java

@@ -1,38 +0,0 @@
-package ch.fritteli.gombaila.domain.lexer;
-
-import ch.fritteli.gombaila.ElementWalker;
-import org.jetbrains.annotations.NotNull;
-
-public class StringWalker extends ElementWalker<String, Character> {
-    private int line = 0;
-    private int column = 0;
-
-    public StringWalker(@NotNull final String string) {
-        super(
-                string,
-                (back, index) -> index < back.length(),
-                String::charAt
-        );
-    }
-
-    public int line() {
-        return this.line + 1;
-    }
-
-    public int column() {
-        return this.column + 1;
-    }
-
-    @NotNull
-    @Override
-    public Character next() {
-        final char c = super.next();
-        if (c == '\n') {
-            this.line++;
-            this.column = 0;
-        } else {
-            this.column++;
-        }
-        return c;
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/parser/Parser.java

@@ -1,179 +0,0 @@
-package ch.fritteli.gombaila.domain.parser;
-
-import ch.fritteli.gombaila.domain.SeqWalker;
-import ch.fritteli.gombaila.domain.common.NodeBinExprAdd;
-import ch.fritteli.gombaila.domain.common.NodeBinExprDiv;
-import ch.fritteli.gombaila.domain.common.NodeBinExprExp;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMinus;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMod;
-import ch.fritteli.gombaila.domain.common.NodeBinExprMult;
-import ch.fritteli.gombaila.domain.common.NodeExpr;
-import ch.fritteli.gombaila.domain.common.NodeExprIdent;
-import ch.fritteli.gombaila.domain.common.NodeExprIntLit;
-import ch.fritteli.gombaila.domain.common.NodeProg;
-import ch.fritteli.gombaila.domain.common.NodeStmt;
-import ch.fritteli.gombaila.domain.common.NodeStmtAssign;
-import ch.fritteli.gombaila.domain.common.NodeStmtExit;
-import ch.fritteli.gombaila.domain.common.NodeStmtIf;
-import ch.fritteli.gombaila.domain.common.NodeStmtIfElse;
-import ch.fritteli.gombaila.domain.common.NodeStmtLet;
-import ch.fritteli.gombaila.domain.common.NodeStmtPrint;
-import ch.fritteli.gombaila.domain.common.NodeStmtScope;
-import ch.fritteli.gombaila.domain.common.Token;
-import ch.fritteli.gombaila.domain.common.TokenType;
-import io.vavr.collection.List;
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-
-public class Parser {
-    @NotNull
-    private final SeqWalker<Token> tokens;
-
-    public Parser(@NotNull final Seq<Token> tokens) {
-        this.tokens = new SeqWalker<>(tokens.reject(token -> TokenType.WHITESPACE.equals(token.type())));
-    }
-
-    @NotNull
-    public NodeProg parse() {
-        Seq<NodeStmt> stmts = List.empty();
-        while (this.tokens.hasNext()) {
-            stmts = stmts.append(this.parseStmt());
-        }
-
-        return new NodeProg(stmts);
-    }
-
-    @NotNull
-    private NodeStmt parseStmt() {
-        final NodeStmt result;
-        if (this.checkNextTokenTypeConsuming(TokenType.EXIT)) {
-            this.assertAndConsumeNextTokenType(TokenType.OPEN_PAREN);
-            final NodeExpr nodeExpr = this.parseExpr(1);
-            this.assertAndConsumeNextTokenType(TokenType.CLOSE_PAREN);
-            result = new NodeStmtExit(nodeExpr);
-        } else if (this.checkNextTokenTypeConsuming(TokenType.LET)) {
-            final NodeStmtAssign nodeStmtAssign = this.parseStmtAssign();
-            result = new NodeStmtLet(nodeStmtAssign);
-        } else if (this.checkNextTokenTypeConsuming(TokenType.PRINT)) {
-            this.assertAndConsumeNextTokenType(TokenType.OPEN_PAREN);
-            final NodeExpr nodeExpr = this.parseExpr(1);
-            this.assertAndConsumeNextTokenType(TokenType.CLOSE_PAREN);
-            result = new NodeStmtPrint(nodeExpr);
-        } else if (this.checkNextTokenType(TokenType.OPEN_CURLY)) {
-            // NB: We do NOT expect a SEMI here, so we return directly.
-            return this.parseScope();
-        } else if (this.checkNextTokenTypeConsuming(TokenType.IF)) {
-            this.assertAndConsumeNextTokenType(TokenType.OPEN_PAREN);
-            final NodeExpr expr = this.parseExpr(1);
-            this.assertAndConsumeNextTokenType(TokenType.CLOSE_PAREN);
-            final NodeStmtScope ifScope = this.parseScope();
-            // there /could/ be an else, so let's check that
-            if (this.checkNextTokenTypeConsuming(TokenType.ELSE)) {
-                final NodeStmtScope elseScope = this.parseScope();
-                return new NodeStmtIfElse(expr, ifScope, elseScope);
-            }
-            // NB: We do NOT expect a SEMI here, so we return directly.
-            return new NodeStmtIf(expr, ifScope);
-        } else if (this.checkNextTokenType(TokenType.IDENTIFIER)) {
-            result = this.parseStmtAssign();
-        } else {
-            throw new ParserException("Could not parse statement", this.tokens.peekNext().getOrNull());
-        }
-
-        this.assertAndConsumeNextTokenType(TokenType.SEMI);
-        return result;
-    }
-
-    @NotNull
-    private NodeStmtAssign parseStmtAssign() {
-        final Token identifier = this.assertAndConsumeNextTokenType(TokenType.IDENTIFIER);
-        this.assertAndConsumeNextTokenType(TokenType.EQUALS);
-        final NodeExpr nodeExpr = this.parseExpr(1);
-        return new NodeStmtAssign(identifier, nodeExpr);
-    }
-
-    @NotNull
-    private NodeStmtScope parseScope() {
-        this.assertAndConsumeNextTokenType(TokenType.OPEN_CURLY);
-        final Seq<NodeStmt> nodeStmts = this.parseStatements();
-        this.assertAndConsumeNextTokenType(TokenType.CLOSE_CURLY);
-        return new NodeStmtScope(nodeStmts);
-    }
-
-    @NotNull
-    private Seq<NodeStmt> parseStatements() {
-        Seq<NodeStmt> result = List.empty();
-        while (!this.checkNextTokenType(TokenType.CLOSE_CURLY)) {
-            result = result.append(this.parseStmt());
-        }
-        return result;
-    }
-
-    @NotNull
-    private NodeExpr parseExpr(final int minPrecedence) {
-        NodeExpr result;
-        if (this.checkNextTokenType(TokenType.INT_LIT)) {
-            result = new NodeExprIntLit(this.tokens.next());
-        } else if (this.checkNextTokenType(TokenType.IDENTIFIER)) {
-            result = new NodeExprIdent(this.tokens.next());
-        } else if (this.checkNextTokenTypeConsuming(TokenType.OPEN_PAREN)) {
-            result = this.parseExpr(1);
-            this.assertAndConsumeNextTokenType(TokenType.CLOSE_PAREN);
-        } else {
-            throw new ParserException(null, this.tokens.peekNext().getOrNull());
-        }
-
-        while (this.hasNextTokenPrecedenceGTE(minPrecedence)) {
-            final Token token = this.tokens.next();
-            final int precedence = token.type().precedence().get();
-            final TokenType.Associativity associativity = token.type().associativity().get();
-            final int nextMinPrecedence;
-            if (associativity == TokenType.Associativity.LEFT) {
-                nextMinPrecedence = precedence + 1;
-            } else {
-                nextMinPrecedence = precedence;
-            }
-            final NodeExpr rhs = this.parseExpr(nextMinPrecedence);
-            result = switch (token.type()) {
-                case PLUS -> new NodeBinExprAdd(result, rhs);
-                case MINUS -> new NodeBinExprMinus(result, rhs);
-                case MULT -> new NodeBinExprMult(result, rhs);
-                case DIV -> new NodeBinExprDiv(result, rhs);
-                case MOD -> new NodeBinExprMod(result, rhs);
-                case EXP -> new NodeBinExprExp(result, rhs);
-                default -> throw new ParserException("Expected binary operator token", token);
-            };
-        }
-
-        return result;
-    }
-
-    private boolean hasNextTokenPrecedenceGTE(final int minPrecedence) {
-        return this.tokens.peekNext()
-                .map(Token::type)
-                .flatMap(TokenType::precedence)
-                .exists(precedence -> precedence >= minPrecedence);
-    }
-
-    private boolean checkNextTokenType(@NotNull final TokenType type) {
-        return this.tokens.peekNext()
-                .exists(token -> token.type().equals(type));
-    }
-
-    private boolean checkNextTokenTypeConsuming(@NotNull final TokenType type) {
-        if (this.tokens.peekNext()
-                .exists(token -> token.type().equals(type))) {
-            this.tokens.next();
-            return true;
-        }
-        return false;
-    }
-
-    @NotNull
-    private Token assertAndConsumeNextTokenType(@NotNull final TokenType type) {
-        if (this.checkNextTokenType(type)) {
-            return this.tokens.next();
-        }
-        throw new ParserException("Unexpected token", this.tokens.peekNext().getOrNull());
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/parser/ParserException.java

@@ -1,22 +0,0 @@
-package ch.fritteli.gombaila.domain.parser;
-
-import ch.fritteli.gombaila.domain.common.Token;
-import org.jetbrains.annotations.Nullable;
-
-public class ParserException extends RuntimeException {
-    @Nullable
-    private final Token token;
-
-    public ParserException(@Nullable final String s, @Nullable final Token token) {
-        super(s);
-        this.token = token;
-    }
-
-    @Override
-    public String getMessage() {
-        return "Parser error at token '%s': %s".formatted(
-                this.token,
-                super.getMessage()
-        );
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/printer/BlankLine.java

@@ -1,21 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import org.jetbrains.annotations.NotNull;
-
-record BlankLine() implements Line {
-
-    @Override
-    public int indentationLevel() {
-        return 0;
-    }
-
-    @Override
-    public void updateWithMap() {
-    }
-
-    @NotNull
-    @Override
-    public String toString() {
-        return "";
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/printer/FormattedLine.java

@@ -1,49 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import io.vavr.collection.Seq;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-record FormattedLine(@NotNull Seq<String> tokens, @Nullable String comment, int indentationLevel,
-                     @NotNull WidthMap widthMap) implements Line {
-    @Override
-    public void updateWithMap() {
-        this.tokens
-                .forEachWithIndex((token, index) -> {
-                    this.widthMap.updateWidthForTokenIndex(index, token.length());
-                });
-    }
-
-    @NotNull
-    @Override
-    public String toString() {
-        final Seq<String> lineElements;
-        if (this.comment == null) {
-            lineElements = this.tokens.dropRight(1)
-                    .zipWithIndex()
-                    .map(tuple -> tuple.map2(this.widthMap::getTokenWidthByIndex))
-                    .map(tuple -> {
-                        final String token = tuple._1();
-                        final int width = tuple._2();
-                        return String.format("%-" + width + "s", token);
-                    })
-                    .appendAll(this.tokens.lastOption());
-        } else {
-            lineElements = this.tokens.zipWithIndex()
-                    .map(tuple -> tuple.map2(this.widthMap::getTokenWidthByIndex))
-                    .map(tuple -> {
-                        final String token = tuple._1();
-                        final int width = tuple._2();
-                        return String.format("%-" + width + "s", token);
-                    })
-                    .append(";")
-                    .append(this.comment);
-        }
-        final String line = lineElements.mkString(" ");
-        final int indents = this.widthMap.getIndentationSize() * this.indentationLevel;
-        if (indents == 0) {
-            return line;
-        }
-        return ("%-" + indents + "s").formatted("") + line;
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/printer/Line.java

@@ -1,5 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-interface Line extends Printable {
-    int indentationLevel();
-}

src/main/java/ch/fritteli/gombaila/domain/printer/Printable.java

@@ -1,10 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import org.jetbrains.annotations.NotNull;
-
-public interface Printable {
-    void updateWithMap();
-
-    @NotNull
-    String toString();
-}

src/main/java/ch/fritteli/gombaila/domain/printer/Printer.java

@@ -1,69 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import io.vavr.collection.List;
-import lombok.NonNull;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.ArrayList;
-
-public class Printer {
-    private static final int INDENTATION_SIZE = 4;
-    private final java.util.List<Printable> printables = new ArrayList<>();
-    private WidthMap widthMap = new WidthMap(INDENTATION_SIZE);
-    private int indentationLevel = 0;
-
-    public void increaseIndent() {
-        this.indentationLevel++;
-    }
-
-    public void decreaseIndent() {
-        this.indentationLevel--;
-    }
-
-    public void resetIndent() {
-        this.indentationLevel = 0;
-    }
-
-    public void comment(@NotNull final String line) {
-        this.printables.add(new RawLine("; %s".formatted(line), this.indentationLevel, this.widthMap));
-    }
-
-    public void section(@NotNull final String sectionName) {
-        this.resetIndent();
-        this.widthMap = new WidthMap(INDENTATION_SIZE);
-        this.printables.add(new RawLine("section %s".formatted(sectionName), this.indentationLevel, this.widthMap));
-    }
-
-    public void label(@NotNull final String label) {
-        this.resetIndent();
-        this.widthMap = new WidthMap(INDENTATION_SIZE);
-        this.printables.add(new RawLine("%s:".formatted(label), this.indentationLevel, this.widthMap));
-        this.increaseIndent();
-    }
-
-    public void blank() {
-        this.printables.add(new RawLine("", 0, this.widthMap));
-    }
-
-    public void line(@NonNull final Object... instructionTokens) {
-        final List<String> tokens = List.of(instructionTokens)
-                .map(String::valueOf);
-        this.printables.add(new FormattedLine(tokens, null, this.indentationLevel, this.widthMap));
-    }
-
-    public void commentedLine(@NotNull final String comment, @NotNull final Object... instructionTokens) {
-        final List<String> tokens = List.of(instructionTokens)
-                .map(String::valueOf);
-        this.printables.add(new FormattedLine(tokens, comment, this.indentationLevel, this.widthMap));
-    }
-
-    public void rawLine(@NotNull final String line) {
-        this.printables.add(new RawLine(line, this.indentationLevel, this.widthMap));
-    }
-
-    @Override
-    public String toString() {
-        this.printables.forEach(Printable::updateWithMap);
-        return List.ofAll(this.printables).mkString("\n");
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/printer/RawLine.java

@@ -1,20 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import org.jetbrains.annotations.NotNull;
-
-record RawLine(@NotNull String line, int indentationLevel, @NotNull WidthMap widthMap) implements Line {
-    @Override
-    public void updateWithMap() {
-        // nop
-    }
-
-    @NotNull
-    @Override
-    public String toString() {
-        final int indents = this.widthMap.getIndentationSize() * this.indentationLevel;
-        if (indents == 0) {
-            return this.line;
-        }
-        return ("%-" + indents + "s%s").formatted("", this.line);
-    }
-}

src/main/java/ch/fritteli/gombaila/domain/printer/WidthMap.java

@@ -1,38 +0,0 @@
-package ch.fritteli.gombaila.domain.printer;
-
-import io.vavr.collection.HashMap;
-import io.vavr.collection.Map;
-import lombok.Getter;
-import org.jetbrains.annotations.NotNull;
-
-public class WidthMap {
-    @Getter
-    private final int indentationSize;
-    @NotNull
-    private Map<Integer, Integer> widthByTokenIndex = HashMap.empty();
-
-    public WidthMap(final int indentationSize) {
-        this.indentationSize = indentationSize;
-    }
-
-    int getMaxLineLengthWithoutComment() {
-        return this.widthByTokenIndex.values()
-                .sum()
-                .intValue();
-    }
-
-    int getTokenWidthByIndex(final int tokenIndex) {
-        return this.widthByTokenIndex.get(tokenIndex).getOrElse(0);
-    }
-
-    void updateWidthForTokenIndex(final int tokenIndex, final int width) {
-        if (!this.hasBiggerWidthAt(tokenIndex, width)) {
-            this.widthByTokenIndex = this.widthByTokenIndex.put(tokenIndex, width);
-        }
-    }
-
-    private boolean hasBiggerWidthAt(final int tokenIndex, final int width) {
-        return this.widthByTokenIndex.get(tokenIndex)
-                .exists(existingWidth -> existingWidth > width);
-    }
-}

src/main/resources/docs/readme.md

@@ -1,19 +0,0 @@
-[Prog] -> [Stmt]*
-
-[Stmt] ->  
-exit([Expr]);  
-let ident = [Expr];
-
-[Expr] ->  
-int_lit  
-ident  
-[BinExpr]
-([Expr])
-
-[BinExpr] ->  
-[Expr] ^ [Expr]; prec=3 assoc=right  
-[Expr] * [Expr]; prec=2 assoc=left  
-[Expr] / [Expr]; prec=2 assoc=left  
-[Expr] % [Expr]; prec=2 assoc=left  
-[Expr] + [Expr]; prec=1 assoc=left
-[Expr] - [Expr]; prec=1 assoc=left