public override object Run(Scope scope)
{
var body = (Body as BlockExpression);
body.Scope.MergeWithScope(Nova.Globals);
body.Scope.MergeWithScope(scope);
var visitor = new VariableNameVisitor();
visitor.Visit(body);
body.SetChildrenScopes(body.Scope);
var block = CompilerServices.CreateLambdaForExpression(body);
var res = block();
if (res is Symbol)
{
var symval = new BlockExpression(new List <Expression> {
new VariableExpression(res)
}, body.Scope);
res = CompilerServices.CreateLambdaForExpression(symval)();
}
else if (res is NovaInstance)
{
var so = (NovaInstance)res;
if (so is NovaBoxedInstance)
{
res = ((NovaBoxedInstance)so).BoxedObject;
}
}
else if (res is NovaNumber)
{
res = NovaNumber.Convert(res);
}
else if (res is NovaString)
{
res = (string)res;
}
else if (res is NovaArray)
{
res = ConvertElements((NovaArray)res);
}
else if (res is NovaDictionary)
{
res = ConvertElements((NovaDictionary)res);
}
body.Scope.MergeIntoScope(scope);
return(res);
}
internal object Run(NovaScope scope)
{
var body = (BlockExpression)Body;
body.SetScope(scope);
body.SetChildrenScopes(body.Scope);
var block = CompilerServices.CreateLambdaForExpression(Expression.Block(body));
var res = block();
if (res is Symbol)
{
var symval = new BlockExpression(new List <Expression> {
new VariableExpression(res)
}, body.Scope);
res = CompilerServices.CreateLambdaForExpression(symval)();
}
return(res);
}
protected virtual Expression VisitBlock(BlockExpression node)
{
node.Body.ForEach(arg => Visit(arg));
return(node);
}
public override Expression Reduce()
{
var forLabel = Label("<nova_for>");
VariableExpression forReturn = null;
LeftHandValueExpression forReturnLh = null;
var useReturn = true;
if (Body.Type == typeof(void))
{
useReturn = false;
}
else
{
forReturn = Variable(Constant("<nova_for_return>"));
forReturnLh = LeftHandValue(forReturn);
forReturn.Scope = ((NovaExpression)Body).Scope;
forReturnLh.Scope = ((NovaExpression)Body).Scope;
}
var forTest = Variable(Constant("<nova_for_test>"));
var forTestLh = LeftHandValue(forTest);
forTest.Scope = ((NovaExpression)Body).Scope;
forTestLh.Scope = ((NovaExpression)Body).Scope;
var realBody = new List <Expression> {
Init,
Label(forLabel),
};
var testAssign = Assign(forTestLh, Test);
realBody.Add(Label(NovaParser.RetryTarget));
testAssign.Scope = (Body as NovaExpression).Scope;
realBody.Add(testAssign);
IfExpression testIf;
if (useReturn)
{
var returnAssign = Assign(forReturnLh, Body);
returnAssign.Scope = (Body as NovaExpression).Scope;
testIf = IfThen(forTest, returnAssign);
}
else
{
testIf = IfThen(forTest, Body);
}
testIf.Scope = ((NovaExpression)Body).Scope;
realBody.Add(testIf);
realBody.Add(Label(NovaParser.ContinueTarget));
realBody.Add(Step);
realBody.Add(IfThen(forTest, Goto(forLabel)));
realBody.Add(Label(NovaParser.BreakTarget));
if (useReturn)
{
realBody.Add(forReturn);
}
var block = new BlockExpression(realBody)
{
Scope = (Body as NovaExpression).Scope
};
return(Convert(block, Type));
}
