private void PrepareReturning(AstNode where, Function function, LexicalScope scope)
{
// Get the definition node and check for generator.
FunctionDefinition defNode = function.DefinitionNode;
bool isGenerator = false;
if(defNode != null)
isGenerator = defNode.IsGenerator;
// Use standard return.
if(function.GetExceptionContext() == null && !isGenerator)
return;
// Create the return block.
BasicBlock returnBlock = new BasicBlock(function);
returnBlock.SetName("retBlock");
function.ReturnBlock = returnBlock;
// Create the return value local.
FunctionType functionType = function.GetFunctionType();
IChelaType retType = functionType.GetReturnType();
if(retType != ChelaType.GetVoidType() && !isGenerator)
function.ReturnValueVar = new LocalVariable(GenSym() + "_retval", scope, retType);
// Create the is returning flag.
function.ReturningVar = new LocalVariable(GenSym() + "_isret", scope, ChelaType.GetBoolType(), isGenerator);
function.ReturningVar.Type = LocalType.Return;
// Create the field for generators.
if(isGenerator)
{
FieldVariable returningField = new FieldVariable("returning", MemberFlags.Private,
ChelaType.GetBoolType(), defNode.GeneratorClass);
defNode.GeneratorClass.AddField(returningField);
function.ReturningVar.ActualVariable = returningField;
}
// Initializer the returning flag to false.
builder.CreateLoadBool(false);
PerformAssignment(where, function.ReturningVar);
}
