From cb6d02efd0eca71076e458b890571385f0bf64a4 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Tue, 6 Aug 2024 13:09:38 +0100
Subject: Chapter 14: Narrow types

Co-authored-by: Thalia Archibald <thalia@archibald.dev>
Co-authored-by: Dibyendu Majumdar <mobile@majumdar.org.uk>
Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
Co-authored-by: Robert Obkircher <robert.obkircher@gmail.com>
---
 .../seaofnodes/simple/fuzzer/ScriptGenerator.java  | 47 +++++++++++++++-------
 1 file changed, 33 insertions(+), 14 deletions(-)

(limited to 'src/test/java/com/seaofnodes/simple/fuzzer')

diff --git a/src/test/java/com/seaofnodes/simple/fuzzer/ScriptGenerator.java b/src/test/java/com/seaofnodes/simple/fuzzer/ScriptGenerator.java
index 94929241..ec6e7816 100644
--- a/src/test/java/com/seaofnodes/simple/fuzzer/ScriptGenerator.java
+++ b/src/test/java/com/seaofnodes/simple/fuzzer/ScriptGenerator.java
@@ -2,8 +2,12 @@ package com.seaofnodes.simple.fuzzer;
 
 import com.seaofnodes.simple.Parser;
 import com.seaofnodes.simple.node.ScopeNode;
+import com.seaofnodes.simple.type.TypeInteger;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Random;
 import java.util.function.Predicate;
 
 /**
@@ -21,7 +25,7 @@ public class ScriptGenerator {
     private static final int MAX_BLOCK_DEPTH = 4;
     private static final int MAX_EXPRESSION_DEPTH = 10;
     private static final int MAX_SUFFIX_RECURSIVE_DEPTH = 10;
-
+ 
     /**
      * Number of spaces per indentation
      */
@@ -54,7 +58,7 @@ public class ScriptGenerator {
     /**
      * Binary operators.
      */
-    private static final String[] BINARY_OP = {"==", "!=", "<", "<=", ">", ">=", "+", "-", "*", "/"};
+    private static final String[] BINARY_OP = {"==", "!=", "<", "<=", ">", ">=", "+", "-", "*", "/", "&", ">>", ">>>", "<<"};
     /**
      * Unary operators.
      */
@@ -91,18 +95,29 @@ public class ScriptGenerator {
 
     private static class TypeInt extends Type {
 
-        TypeInt() {
-            super("int");
+        TypeInt(String name) {
+            super(name);
         }
 
         @Override
         boolean isa(Type other) {
-            return super.isa(other) || other == TYPE_FLT;
+            return super.isa(other) || other == TYPE_FLT || other instanceof TypeInt;
         }
     }
 
-    private static final Type TYPE_INT = new TypeInt();
+    private static final List<TypeInt> INTTYPES = new ArrayList<>();
+
+    static {
+        new Parser("", TypeInteger.BOT);
+        for(var e:Parser.TYPES.entrySet()) {
+            if (e.getValue() instanceof TypeInteger) {
+                INTTYPES.add(new TypeInt(e.getKey()));
+            }
+        }
+    }
 
+    private static final Type TYPE_INT = INTTYPES.stream().filter(t->t.name.equals("int")).findAny().get();
+    private static final Type TYPE_BOOL = INTTYPES.stream().filter(t->t.name.equals("bool")).findAny().get();
 
     private static class Variable {
         final String name;
@@ -361,13 +376,17 @@ public class ScriptGenerator {
         return v;
     }
 
+    public TypeInt getIntType() {
+        return randFromList(INTTYPES);
+    }
+
     /**
      * Get a random type
      * @return A random type
      */
     private Type getType(boolean allowForward) {
         int t = random.nextInt(10);
-        if( t<5 || structs.isEmpty() ) return TYPE_INT;
+        if( t<5 || structs.isEmpty() ) return getIntType();
         if( t<7 ) return TYPE_FLT;
         if (allowForward && random.nextInt(10)==0) {
             int i=random.nextInt(forwardStructs.size()+1);
@@ -448,7 +467,7 @@ public class ScriptGenerator {
         int idx = random.nextInt(forwardStructs.size()+10);
         TypeStruct struct;
         if (idx < 10) {
-            var name = getStructName();
+        var name = getStructName();
             struct = new TypeStruct(name);
             forwardStructs.add(struct);
         } else {
@@ -561,7 +580,7 @@ public class ScriptGenerator {
      */
     public int genIf() {
         sb.append("if(");
-        genExpression(TYPE_INT, true);
+        genExpression(TYPE_BOOL, true);
         sb.append(") ");
         var stop = genStatementBlock();
         if ((stop & FLAG_IF_WITHOUT_ELSE) == 0 && random.nextInt(10) > 3) {
@@ -607,7 +626,7 @@ public class ScriptGenerator {
      */
     public int genWhile() {
         sb.append("while(");
-        genExpression(TYPE_INT, true);
+        genExpression(TYPE_BOOL, true);
         sb.append(") ");
         loopDepth++;
         genStatementBlock();
@@ -725,7 +744,7 @@ public class ScriptGenerator {
      */
     public void genExpression(Type type, boolean change) {
         if (change && generateInvalid()) type = getType();
-        if (type != TYPE_INT && type != TYPE_FLT) {
+        if (!(type instanceof TypeInt) && type != TYPE_FLT) {
             genUnary(type, false);
             return;
         }
@@ -742,7 +761,7 @@ public class ScriptGenerator {
      */
     public void genUnary(Type type, boolean change) {
         if (change && generateInvalid()) type = getType();
-        if (type != TYPE_INT && type != TYPE_FLT) {
+        if (!(type instanceof TypeInt) && type != TYPE_FLT) {
             genSuffix(type, false);
             return;
         }
@@ -822,7 +841,7 @@ public class ScriptGenerator {
      */
     public void genConst(Type type) {
         if (generateInvalid()) type = getType();
-        if (type == TYPE_INT || (type == TYPE_FLT && random.nextBoolean())) {
+        if (type instanceof TypeInt || (type == TYPE_FLT && random.nextBoolean())) {
             var rand = random.nextInt(10);
             switch (rand) {
                 case 0 -> sb.append("true");
-- 
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