private void Visit(AssignmentExpression assignmentExpression)
{
if (currentAssignmentOperatorStatus != AssignmentOperatorStatus.Read)
{
errorWarningLog.Error(XenkoMessageCode.ErrorNestedAssignment, assignmentExpression.Span, assignmentExpression, shaderName);
}
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
assignmentExpression.Value = (Expression)VisitDynamic(assignmentExpression.Value);
currentAssignmentOperatorStatus = (assignmentExpression.Operator != AssignmentOperator.Default) ? AssignmentOperatorStatus.ReadWrite : AssignmentOperatorStatus.Write;
currentStreamUsage = StreamUsage.Write;
assignmentExpression.Target = (Expression)VisitDynamic(assignmentExpression.Target);
currentAssignmentOperatorStatus = AssignmentOperatorStatus.Read;
currentStreamUsage = prevStreamUsage;
var parentBlock = this.NodeStack.OfType <StatementList>().LastOrDefault();
if (assignmentExpression.Operator == AssignmentOperator.Default && parentBlock != null)
{
if (assignmentExpression.Target is VariableReferenceExpression && (assignmentExpression.Target as VariableReferenceExpression).Name == StreamsType.ThisStreams.Name) // "streams = ...;"
{
StreamAssignations.Add(assignmentExpression, parentBlock);
}
else if (assignmentExpression.Value is VariableReferenceExpression && (assignmentExpression.Value as VariableReferenceExpression).Name == StreamsType.ThisStreams.Name) // "... = streams;"
{
AssignationsToStream.Add(assignmentExpression, parentBlock);
}
}
}
private void Visit(AssignmentExpression assignmentExpression)
{
if (currentAssignmentOperatorStatus != AssignmentOperatorStatus.Read)
{
errorWarningLog.Error(ParadoxMessageCode.ErrorNestedAssignment, assignmentExpression.Span, assignmentExpression, shaderName);
}
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
assignmentExpression.Value = (Expression)VisitDynamic(assignmentExpression.Value);
currentAssignmentOperatorStatus = (assignmentExpression.Operator != AssignmentOperator.Default) ? AssignmentOperatorStatus.ReadWrite : AssignmentOperatorStatus.Write;
currentStreamUsage = StreamUsage.Write;
assignmentExpression.Target = (Expression)VisitDynamic(assignmentExpression.Target);
currentAssignmentOperatorStatus = AssignmentOperatorStatus.Read;
currentStreamUsage = prevStreamUsage;
if (assignmentExpression.Operator == AssignmentOperator.Default)
{
if (assignmentExpression.Target is VariableReferenceExpression && (assignmentExpression.Target as VariableReferenceExpression).Name.Text == "streams") // "streams = ...;"
{
StreamAssignations.Add(assignmentExpression);
}
else if (assignmentExpression.Value is VariableReferenceExpression && (assignmentExpression.Value as VariableReferenceExpression).Name.Text == "streams") // "... = streams;"
{
AssignationsToStream.Add(assignmentExpression);
}
}
}
protected void Visit(UnaryExpression expression)
{
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
Visit((Node)expression);
currentStreamUsage = prevStreamUsage;
}
public override void Visit(UnaryExpression expression)
{
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
base.Visit(expression);
currentStreamUsage = prevStreamUsage;
}
protected void Visit(MemberReferenceExpression memberReferenceExpression)
{
var usageCopy = currentStreamUsage;
currentStreamUsage |= StreamUsage.Partial;
Visit((Node)memberReferenceExpression);
currentStreamUsage = usageCopy;
// check if it is a stream
if (IsStreamMember(memberReferenceExpression))
{
AddStreamUsage(memberReferenceExpression.TypeInference.Declaration as Variable, memberReferenceExpression, currentStreamUsage);
}
}
/// <summary>
/// Adds a stream usage to the current method
/// </summary>
/// <param name="variable">the stream Variable</param>
/// <param name="expression">the calling expression</param>
/// <param name="usage">the encountered usage</param>
private void AddStreamUsage(Variable variable, SiliconStudio.Shaders.Ast.Expression expression, StreamUsage usage)
{
currentStreamUsageList.Add(new StreamUsageInfo {
CallType = StreamCallType.Member, Variable = variable, Expression = expression, Usage = usage
});
}
/// <summary>
/// Adds a stream usage to the current method
/// </summary>
/// <param name="variable">the stream Variable</param>
/// <param name="expression">the calling expression</param>
/// <param name="usage">the encountered usage</param>
private void AddStreamUsage(Variable variable, SiliconStudio.Shaders.Ast.Expression expression, StreamUsage usage)
{
currentStreamUsageList.Add(new StreamUsageInfo { CallType = StreamCallType.Member, Variable = variable, Expression = expression, Usage = usage });
}
/// <summary>
/// Analyse the AssignmentExpression to correctly infer the potential stream usage
/// </summary>
/// <param name="assignmentExpression">the AssignmentExpression</param>
public override void Visit(AssignmentExpression assignmentExpression)
{
if (currentAssignmentOperatorStatus != AssignmentOperatorStatus.Read)
errorWarningLog.Error(XenkoMessageCode.ErrorNestedAssignment, assignmentExpression.Span, assignmentExpression, shaderName);
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
assignmentExpression.Value = (Expression)VisitDynamic(assignmentExpression.Value);
currentAssignmentOperatorStatus = (assignmentExpression.Operator != AssignmentOperator.Default) ? AssignmentOperatorStatus.ReadWrite : AssignmentOperatorStatus.Write;
currentStreamUsage = StreamUsage.Write;
assignmentExpression.Target = (Expression)VisitDynamic(assignmentExpression.Target);
currentAssignmentOperatorStatus = AssignmentOperatorStatus.Read;
currentStreamUsage = prevStreamUsage;
var parentBlock = this.NodeStack.OfType<StatementList>().LastOrDefault();
if (assignmentExpression.Operator == AssignmentOperator.Default && parentBlock != null)
{
if (assignmentExpression.Target is VariableReferenceExpression && (assignmentExpression.Target as VariableReferenceExpression).Name == StreamsType.ThisStreams.Name) // "streams = ...;"
StreamAssignations.Add(assignmentExpression, parentBlock);
else if (assignmentExpression.Value is VariableReferenceExpression && (assignmentExpression.Value as VariableReferenceExpression).Name == StreamsType.ThisStreams.Name) // "... = streams;"
AssignationsToStream.Add(assignmentExpression, parentBlock);
}
}
public override void Visit(UnaryExpression expression)
{
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
base.Visit(expression);
currentStreamUsage = prevStreamUsage;
}
public override void Visit(MemberReferenceExpression memberReferenceExpression)
{
var usageCopy = currentStreamUsage;
currentStreamUsage |= StreamUsage.Partial;
base.Visit(memberReferenceExpression);
currentStreamUsage = usageCopy;
// check if it is a stream
if (IsStreamMember(memberReferenceExpression))
AddStreamUsage(memberReferenceExpression.TypeInference.Declaration as Variable, memberReferenceExpression, currentStreamUsage);
}
public static bool IsPartial(this StreamUsage usage)
{
return((usage & StreamUsage.Partial) != 0);
}
public static bool IsWrite(this StreamUsage usage)
{
return((usage & StreamUsage.Write) != 0);
}
public static bool IsRead(this StreamUsage usage)
{
return((usage & StreamUsage.Read) != 0);
}
protected void Visit(UnaryExpression expression)
{
var prevStreamUsage = currentStreamUsage;
currentStreamUsage = StreamUsage.Read;
Visit((Node)expression);
currentStreamUsage = prevStreamUsage;
}
