private void CreateGeneratorTemps(EnvironmentFactory ef, CodeGen cg)
{
for (int i = 0; i < tempsCount; i++)
{
cg.Names.AddTempSlot(ef.MakeEnvironmentReference(Name.Make("temp$" + i)).CreateSlot(cg.EnvironmentSlot));
}
}
private void EmitGeneratorBody(CodeGen cg, CodeGen ocg)
{
// Create the GenerateNext function
CodeGen ncg = cg.DefineMethod(name.GetString() + "$g" + counter++, typeof(bool),
new Type[] { typeof(Generator), typeof(object).MakeByRefType() },
new String[] { "$gen", "$ret" });
PromoteLocalsToEnvironment();
// Namespace without er factory - all locals must exist ahead of time
ncg.Names = new Namespace(null);
Slot generator = ncg.GetArgumentSlot(0);
ncg.StaticLinkSlot = new FieldSlot(generator, typeof(Generator).GetField("staticLink"));
if (HasEnvironment)
{
cg.EnvironmentSlot = CreateEnvironment(cg);
EnvironmentFactory ef = this.environmentFactory;
Slot envSlotCast = new CastSlot(
new FieldSlot(generator, typeof(Generator).GetField("environment")),
ef.EnvironmentType
);
Slot envSlot = ncg.GetLocalTmp(ef.EnvironmentType);
// setup the environment and static link slots
ncg.EnvironmentSlot = envSlot;
ncg.ContextSlot = envSlot;
// pull the environment into typed local variable
envSlot.EmitSet(ncg, envSlotCast);
InheritEnvironment(ncg);
CreateGeneratorTemps(ef, ncg);
}
else
{
ncg.ContextSlot = ncg.StaticLinkSlot;
}
ncg.ModuleSlot = new PropertySlot(ncg.ContextSlot, typeof(ICallerContext).GetProperty("Module"));
CreateClosureSlots(ncg);
CreateGlobalSlots(ncg, ocg);
// Emit the generator body using the typed er
EmitGenerator(ncg);
// Initialize the generator
EmitTupleParams(cg);
// Create instance of the generator
cg.EmitStaticLinkOrNull();
cg.EmitEnvironmentOrNull();
cg.EmitDelegate(ncg, typeof(Generator.NextTarget), null);
cg.EmitNew(typeof(Generator), new Type[] { typeof(FunctionEnvironmentDictionary), typeof(FunctionEnvironmentDictionary), typeof(Generator.NextTarget) });
cg.EmitReturn();
}
public EnvironmentNamespace(EnvironmentFactory factory)
{
this.factory = factory;
}
private static Type GetEnvironmentType(int size, CodeGen cg, out ConstructorInfo ctor, out EnvironmentFactory ef)
{
Type envType;
#region Generated partial factories
// *** BEGIN GENERATED CODE ***
if (size <= 32 && Options.OptimizeEnvironments)
{
if (size <= 2)
{
envType = typeof(FunctionEnvironment2Dictionary);
}
else if (size <= 4)
{
envType = typeof(FunctionEnvironment4Dictionary);
}
else if (size <= 8)
{
envType = typeof(FunctionEnvironment8Dictionary);
}
else if (size <= 16)
{
envType = typeof(FunctionEnvironment16Dictionary);
}
else
{
envType = typeof(FunctionEnvironment32Dictionary);
}
ctor = envType.GetConstructor(new Type[] { typeof(FunctionEnvironmentDictionary), typeof(IFrameEnvironment), typeof(SymbolId[]) });
ef = new FieldEnvironmentFactory(envType);
}
else
{
cg.EmitInt(size);
envType = typeof(FunctionEnvironmentNDictionary);
ctor = envType.GetConstructor(new Type[] { typeof(int), typeof(FunctionEnvironmentDictionary), typeof(IFrameEnvironment), typeof(SymbolId[]) });
ef = new IndexEnvironmentFactory(size);
}
// *** END GENERATED CODE ***
#endregion
return(envType);
}
protected Slot CreateEnvironment(CodeGen cg)
{
// Get the environment size
int size = CalculateEnvironmentSize();
// Create the array for the names
Slot namesSlot = cg.GetLocalTmp(typeof(SymbolId[]));
cg.EmitInt(size - tempsCount);
cg.Emit(System.Reflection.Emit.OpCodes.Newarr, typeof(SymbolId));
namesSlot.EmitSet(cg);
// Find the right environment type
ConstructorInfo ctor;
EnvironmentFactory esf;
Type envType = GetEnvironmentType(size, cg, out ctor, out esf);
// Emit the static link for the environment constructor
cg.EmitStaticLinkOrNull();
cg.EmitCallerContext();
// Emit the names array for the environment constructor
namesSlot.EmitGet(cg);
cg.EmitNew(ctor);
// Store the environment reference in the local
Slot environmentSlot = cg.GetFrameSlot(envType);
environmentSlot.EmitSet(cg);
// Remember the environment factory for parent access
environmentFactory = esf;
// Create environment references
environment = new Dictionary <Name, EnvironmentReference>();
foreach (KeyValuePair <Name, Binding> kv in names)
{
if (!kv.Value.IsEnvironment)
{
continue;
}
Name name = kv.Key;
EnvironmentReference er = esf.MakeEnvironmentReference(name);
Slot slot = er.CreateSlot(environmentSlot);
Slot current;
if (cg.Names.Slots.TryGetValue(name, out current))
{
slot.EmitSet(cg, current);
}
else
{
slot.EmitSetUninitialized(cg, name);
}
// Set the name into the array
namesSlot.EmitGet(cg);
cg.EmitInt(er.Index);
cg.Emit(OpCodes.Ldelema, typeof(SymbolId));
cg.EmitSymbolIdInt(name.GetString());
cg.Emit(OpCodes.Call, typeof(SymbolId).GetConstructor(new Type[] { typeof(int) }));
// The full slot goes to the codegen's namespace
cg.Names.SetSlot(name, slot);
// Environment reference goes to the environment
environment[name] = er;
}
return(environmentSlot);
}