public SequenceBodyContext(ExpressionCompiler compiler, string name, SequenceBodyExpression sequenceBody, FunctionContext forward)
: base(compiler, forward.FrameIndex + 1, forward.Scope, forward.FullName, name)
{
_forward = forward;
_identifierMap = new IdentifierMap();
_index = 0;
SequenceBody = sequenceBody;
}
public SequenceBodyContext(ExpressionCompiler compiler, string name, FunctionContext parent, SequenceBodyExpression sequenceBody)
: base(compiler, parent.ArgIndex + 1, parent.LocalIndex + 1, parent.Scope, parent.FullName, name)
{
SequenceBody = sequenceBody;
}
public SequenceContext(ExpressionCompiler compiler, string name, SequenceBodyExpression sequenceBody, FunctionContext forward)
: base(compiler, forward.ArgIndex, forward.LocalIndex, forward.Scope, forward.FullName, name)
{
_sequenceBody = sequenceBody;
_forward = forward;
}
public override void CompileBody(FunctionContext context)
{
var state = context.DefineInternal("state");
var enumerable = context.DefineInternal("enumerable");
var stack = 0;
var bodyToken = new Token(Token, TokenType.Fun, null);
var body = new SequenceBodyExpression(bodyToken, null, Block, "moveNext", state, enumerable);
var seqContext = new SequenceContext(context.Compiler, "moveNext", body, context);
var getEnumerator = context.MakeFunction("getEnumerator");
getEnumerator.Function(getEnumerator.FullName);
getEnumerator.Bind(getEnumerator.Label);
getEnumerator.Enter();
getEnumerator.Load(enumerable);
getEnumerator.Return();
var dispose = context.MakeFunction("dispose");
dispose.Function(dispose.FullName);
dispose.Bind(dispose.Label);
dispose.Enter();
dispose.LoadUndefined();
dispose.Return();
stack += context.Bind(context.Label);
stack += context.Enter();
if (OtherArguments != null)
{
stack += context.VarArgs(Arguments.Count);
}
stack += context.Load(context.Number(0));
stack += context.Store(state);
stack += context.NewObject();
stack += context.Dup();
stack += context.LoadUndefined();
stack += context.Swap();
stack += context.StoreField(context.String("current"));
stack += context.Dup();
stack += body.Compile(seqContext);
stack += context.Swap();
stack += context.StoreField(context.String("moveNext"));
stack += context.Dup();
stack += context.Closure(getEnumerator.Label);
stack += context.Swap();
stack += context.StoreField(context.String("getEnumerator"));
stack += context.Dup();
stack += context.Closure(dispose.Label);
stack += context.Swap();
stack += context.StoreField(context.String("dispose"));
stack += context.Store(enumerable);
stack += context.Load(enumerable);
stack += context.Return();
CheckStack(stack, 0);
}