Trying to implement LOOP

Author: tsg100

src/main/java/com/InterpreterMain.java

@@ -7,7 +7,15 @@ public class InterpreterMain {
     public static void main(String[] args) throws Exception {
         String input = new String("""
           {
-            PRINT 4 + 3 - 2;
+          DECLARE a;
+          a = 1;
+            LOOP{
+            PRINT(a);
+            a = a + 1;
+            IF(a > 10){
+            BREAK
+            }
+            }ENDLOOP
           }
                 """);
         com.compiler.CompileEnv compileEnv = new com.compiler.CompileEnv(input, false);

src/main/java/com/compiler/StmtParser.java

@@ -87,6 +87,14 @@ public ASTStmtNode parseStmt() throws Exception {
             return parseIfElseStmt();
         }
 
+        if (type == Type.LOOP) {
+            return parseForLoop();
+        }
+
+        if(type == Type.BREAK){
+            return parseBreakNode();
+        }
+
         m_lexer.throwCompilerException("Invalid begin of statement", "DECLARE or IDENTIFIER or PRINT or NUMERIC_IF");
         return null; // unreachable
     }
@@ -303,6 +311,22 @@ ASTDoWhileLoopStmtNode parseDoWhileLoopStmt() throws Exception {
         m_lexer.expect(Type.SEMICOLON);
         return new ASTDoWhileLoopStmtNode(predicate, body);
     }
+
+    public ASTStmtNode parseForLoop() throws Exception {
+        //loopstmt : loopstart [stmtlist] loopend
+        m_lexer.expect(Type.LOOP);
+        m_lexer.expect(Type.LBRACE);
+        ASTStmtListNode body = parseStmtlist();
+        m_lexer.expect(Type.RBRACE);
+        m_lexer.expect(Type.ENDLOOP);
+        return new ASTLoopStmtNode(body);
+
+    }
+
+    private ASTStmtNode parseBreakNode() throws Exception {
+        m_lexer.expect(Type.BREAK);
+        return new ASTBreakExprNode();
+    }
 
     ASTStmtNode parseExecuteNTimesStmt() throws Exception {
     	// EXECUTE integer|identifier TIMES LBRACE stmtList RBRACE SEMICOLON

src/main/java/com/compiler/ast/ASTBreakExprNode.java

@@ -0,0 +1,15 @@
+package com.compiler.ast;
+
+import java.io.OutputStreamWriter;
+
+public class ASTBreakExprNode extends ASTStmtNode{
+    @Override
+    public void print(OutputStreamWriter outStream, String indent) throws Exception {
+
+    }
+
+    @Override
+    public void execute(OutputStreamWriter out) {
+
+    }
+}

src/main/java/com/compiler/ast/ASTLoopStmtNode.java

@@ -0,0 +1,43 @@
+package com.compiler.ast;
+
+import com.compiler.CompileEnvIntf;
+import com.compiler.InstrBlock;
+import com.compiler.instr.InstrJump;
+
+import java.io.OutputStreamWriter;
+
+public class ASTLoopStmtNode extends ASTStmtNode{
+
+    //loopstmt : loopstart stmtlist loopend
+    //
+    //loopstart : LOOP LBRACE
+    //
+    //loopend : RBRACE ENDLOOP
+
+    private ASTStmtListNode m_body;
+
+    public ASTLoopStmtNode(ASTStmtListNode body) {
+        m_body = body;
+    }
+
+    @Override
+    public void execute(OutputStreamWriter out) {
+        for(ASTStmtNode node : m_body.stmts){
+            if((node instanceof ASTBreakExprNode)){
+                node.execute(out);
+            }
+        }
+    }
+
+    @Override
+    public void codegen(CompileEnvIntf env){
+
+
+
+    }
+
+    @Override
+    public void print(OutputStreamWriter outStream, String indent) throws Exception {
+
+    }
+}