finish StatmentGenerator

src/main/java/de/dhbw/horb/ExpressionGenerator.java

@@ -2,6 +2,7 @@ package de.dhbw.horb;
 
 import de.dhbw.horb.ast.*;
 
+import java.util.Collections;
 import java.util.List;
 
 public class ExpressionGenerator extends DecafBaseVisitor<Expression> {
@@ -34,7 +35,7 @@ public class ExpressionGenerator extends DecafBaseVisitor<Expression> {
 
     public static FunctionCall generateFunctionCall(DecafParser.FuncCallContext ctx) {
         String name = ctx.id().getText();
-        List<DecafParser.ExprContext> expressions = ctx.args().expr();
+        List<DecafParser.ExprContext> expressions = ctx.args() == null ? Collections.emptyList() : ctx.args().expr();
         List<Expression> args = expressions.stream()
                 .map(exp -> new ExpressionGenerator().visit(exp)).toList();
         return new FunctionCall(name, args);

src/main/java/de/dhbw/horb/StatementGenerator.java

@@ -2,43 +2,74 @@ package de.dhbw.horb;
 
 import de.dhbw.horb.ast.*;
 
-import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 public class StatementGenerator extends DecafBaseVisitor<Statement> {
     @Override
     public Statement visitAssign(DecafParser.AssignContext ctx) {
-        throw new RuntimeException("TODO");
+        Location loc = ExpressionGenerator.generateLocation(ctx.loc());
+        Expression exp = ctx.expr().accept(new ExpressionGenerator());
+        return new Assignment(loc, exp);
+    }
+
+    @Override
+    public Statement visitFunctionCall(DecafParser.FunctionCallContext ctx) {
+        return ExpressionGenerator.generateFunctionCall(ctx.funcCall());
     }
 
     @Override
     public Statement visitIf(DecafParser.IfContext ctx) {
-        throw new RuntimeException("TODO");
+        Expression exp = ctx.accept(new ExpressionGenerator());
+        Block ifBlock = generateBlock(ctx.block(0));
+        Block elseBlock = ctx.block().size() > 1 ?
+                generateBlock(ctx.block(1)) :
+                new Block(Collections.emptyList(), Collections.emptyList());
+        return new IfElse(exp, ifBlock, elseBlock);
     }
 
     @Override
     public Statement visitWhile(DecafParser.WhileContext ctx) {
-        throw new RuntimeException("TODO");
+        return new While(ctx.expr().accept(new ExpressionGenerator()), generateBlock(ctx.block()));
     }
 
     @Override
     public Statement visitReturn(DecafParser.ReturnContext ctx) {
-        throw new RuntimeException("TODO");
+        return new Return(ctx.expr().accept(new ExpressionGenerator()));
     }
 
     @Override
     public Statement visitReturnVoid(DecafParser.ReturnVoidContext ctx) {
-        throw new RuntimeException("TODO");
+        return new ReturnVoid();
     }
 
     @Override
     public Statement visitBreak(DecafParser.BreakContext ctx) {
-        throw new RuntimeException("TODO");
+        return new Break();
     }
 
     @Override
     public Statement visitContinue(DecafParser.ContinueContext ctx) {
-        throw new RuntimeException("TODO");
+        return new Continue();
     }
 
+    public Block generateBlock(DecafParser.BlockContext ctx) {
+        List<Variable> vars = ctx.var().stream().map(StatementGenerator::generateVariable).toList();
+        List<Statement> stmt = ctx.stmt().stream().map(this::visit).toList();
+        return new Block(vars, stmt);
+    }
+
+    public static Variable generateVariable(DecafParser.VarContext ctx) {
+        Type type;
+        if (ctx.type().INT() != null) {
+            type = Type.INT;
+        } else if (ctx.type().BOOL() != null) {
+            type = Type.BOOL;
+        } else if (ctx.type().VOID() != null) {
+            type = Type.VOID;
+        } else {
+            throw new RuntimeException("Unknown Type");
+        }
+        return new Variable(ctx.id().getText(), type);
+    }
 }

src/main/java/de/dhbw/horb/ast/FunctionCall.java

@@ -2,5 +2,5 @@ package de.dhbw.horb.ast;
 
 import java.util.List;
 
-public record FunctionCall(String name, List<Expression> args) implements Expression {
+public record FunctionCall(String name, List<Expression> args) implements Expression, Statement {
 }

src/main/java/de/dhbw/horb/ast/Statement.java

@@ -1,4 +1,4 @@
 package de.dhbw.horb.ast;
 
-public sealed interface Statement extends Node permits Assignment, VoidFunctionCall, IfElse, While, Return, ReturnVoid, Break, Continue {
+public sealed interface Statement extends Node permits Assignment, Break, Continue, FunctionCall, IfElse, Return, ReturnVoid, VoidFunctionCall, While {
 }

src/test/java/de/dhbw/horb/StatementGeneratorTest.java

@@ -7,12 +7,40 @@ import org.antlr.v4.runtime.CommonTokenStream;
 import org.junit.Test;
 
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.assertEquals;
 
 /**
  * Unit test for AST Generation of Expressions.
  */
 public class StatementGeneratorTest
 {
+    @Test
+    public void ifTest() {
+        Statement stmt = generateStatement("if (true) { break; }");
+        assertTrue(stmt instanceof IfElse);
+        IfElse ifElse = (IfElse) stmt;
+        assertEquals(0, (ifElse.elseBlock().stmts().size()));
+        assertTrue(ifElse.ifBlock().stmts().get(0) instanceof Break);
+    }
+
+    @Test
+    public void ifElseTest() {
+        Statement stmt = generateStatement("if (true) { int x; } else { return; }");
+        assertTrue(stmt instanceof IfElse);
+        IfElse ifElse = (IfElse) stmt;
+        assertEquals("x", ifElse.ifBlock().vars().get(0).name());
+        assertTrue(ifElse.elseBlock().stmts().get(0) instanceof ReturnVoid);
+    }
+
+    @Test
+    public void methodCall() {
+        Statement stmt = generateStatement("foo();");
+        assertTrue(stmt instanceof FunctionCall);
+        FunctionCall functionCall = (FunctionCall) stmt;
+        assertEquals(0, functionCall.args().size());
+        assertEquals("foo", functionCall.name());
+    }
+
     @Test
     public void whileTest()
     {