generate bytecode for script

It is just prototype

* does not make top level symbols visible as class members yet
* does not take parameters
* Script class name is hardcoded now

compiler/frontend/src/org/jetbrains/jet/lang/descriptors/ScriptDescriptor.java

@@ -38,6 +38,11 @@ public class ScriptDescriptor extends DeclarationDescriptorImpl {
         this.returnType = returnType;
     }
 
+    @NotNull
+    public JetType getReturnType() {
+        return returnType;
+    }
+
     @Override
     public DeclarationDescriptor substitute(TypeSubstitutor substitutor) {
         throw new IllegalStateException("nothing to substitute in script");

compiler/frontend/src/org/jetbrains/jet/lang/psi/JetPsiUtil.java

@@ -143,7 +143,12 @@ public class JetPsiUtil {
     }
 
     public static FqName getFQName(JetFile file) {
-        return getFQName(file.getNamespaceHeader());
+        if (file.isScript()) {
+            return FqName.ROOT;
+        }
+        else {
+            return getFQName(file.getNamespaceHeader());
+        }
     }
 
     @Nullable

compiler/frontend/src/org/jetbrains/jet/lang/resolve/BodyResolver.java

@@ -630,7 +630,7 @@ public class BodyResolver {
                     Maps.<JetPattern, List<VariableDescriptor>>newHashMap(),
                     new LabelResolver(),
                     trace,
-                    this.context.getRootScope(),
+                    scope,
                     DataFlowInfo.EMPTY,
                     NO_EXPECTED_TYPE,
                     false);

compiler/frontend/src/org/jetbrains/jet/lang/resolve/TypeHierarchyResolver.java

@@ -29,6 +29,7 @@ import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.scopes.JetScope;
 import org.jetbrains.jet.lang.resolve.scopes.RedeclarationHandler;
 import org.jetbrains.jet.lang.resolve.scopes.WritableScope;
+import org.jetbrains.jet.lang.resolve.scopes.WritableScopeImpl;
 import org.jetbrains.jet.lang.resolve.scopes.WriteThroughScope;
 import org.jetbrains.jet.lang.types.JetType;
 import org.jetbrains.jet.lang.types.SubstitutionUtils;
@@ -207,8 +208,9 @@ public class TypeHierarchyResolver {
                 private void processScript(JetScript script) {
                     NamespaceDescriptorImpl ns = namespaceFactory.createNamespaceDescriptorPathIfNeeded(FqName.ROOT);
                     ScriptDescriptor scriptDescriptor = new ScriptDescriptor(ns);
-                    WriteThroughScope scriptScope = new WriteThroughScope(
-                            outerScope, ns.getMemberScope(), new TraceBasedRedeclarationHandler(trace));
+                    //WriteThroughScope scriptScope = new WriteThroughScope(
+                    //        outerScope, ns.getMemberScope(), new TraceBasedRedeclarationHandler(trace));
+                    WritableScopeImpl scriptScope = new WritableScopeImpl(outerScope, scriptDescriptor, RedeclarationHandler.DO_NOTHING);
                     scriptScope.changeLockLevel(WritableScope.LockLevel.BOTH);
                     context.getScriptScopes().put(script, scriptScope);
                     context.getScripts().put(script, scriptDescriptor);