public override void GenerateCode(VisualScriptCompilerContext context)
{
var arguments = new List <SyntaxNodeOrToken>();
var memberCallProcessed = false;
var invocationTarget = MethodName;
for (int index = 0; index < Slots.Count; index++)
{
var slot = Slots[index];
if (slot.Direction == SlotDirection.Input && slot.Kind == SlotKind.Value)
{
var argument = context.GenerateExpression(slot);
if (IsMemberCall && !memberCallProcessed)
{
// this parameter (non-static or extension method)
memberCallProcessed = true;
invocationTarget = argument.ToFullString() + "." + invocationTarget;
continue;
}
if (arguments.Count > 0)
{
arguments.Add(Token(SyntaxKind.CommaToken));
}
arguments.Add(Argument(argument));
}
}
var expression = InvocationExpression(ParseExpression(invocationTarget), ArgumentList(SeparatedList <ArgumentSyntax>(arguments)));
var statement = (StatementSyntax)ExpressionStatement(expression);
// Only store return variable if somebody is using it
if (ReturnSlot != null && context.FindOutputLinks(ReturnSlot).Any())
{
var localVariableName = context.GenerateLocalVariableName();
// Store return value in a local variable
statement =
LocalDeclarationStatement(
VariableDeclaration(
IdentifierName("var"))
.WithVariables(
SingletonSeparatedList <VariableDeclaratorSyntax>(
VariableDeclarator(
Identifier(localVariableName))
.WithInitializer(
EqualsValueClause(expression)))));
context.RegisterLocalVariable(ReturnSlot, localVariableName);
}
context.AddStatement(statement);
}
public override void GenerateCode(VisualScriptCompilerContext context)
{
// Create local variable that will store the item
var itemVariableName = context.GenerateLocalVariableName("item");
context.RegisterLocalVariable(ItemSlot, itemVariableName);
// Switch to "continue" instead of "return" in case there is no next node
var wasInsideLoop = context.IsInsideLoop;
context.IsInsideLoop = true;
var innerBlockStatements = context.ProcessInnerLoop(LoopSlot);
context.IsInsideLoop = wasInsideLoop;
context.AddStatement(ForEachStatement(IdentifierName("var"), itemVariableName, context.GenerateExpression(CollectionSlot), Block(innerBlockStatements)));
}
public override void GenerateCode(VisualScriptCompilerContext context)
{
var blockStatement = ParseStatement($"{{ {Code} }}");
// Forward diagnostics to log
foreach (var diagnostic in blockStatement.GetDiagnostics())
{
LogMessageType logType;
switch (diagnostic.Severity)
{
case DiagnosticSeverity.Info:
logType = LogMessageType.Info;
break;
case DiagnosticSeverity.Warning:
logType = LogMessageType.Warning;
break;
case DiagnosticSeverity.Error:
logType = LogMessageType.Error;
break;
default:
throw new ArgumentOutOfRangeException();
}
context.Log.Log(new LogMessage(nameof(CustomCodeBlock), logType, diagnostic.GetMessage()));
}
var block = blockStatement as BlockSyntax;
if (block != null)
{
RoslynHelper.CreateCompilationUnitFromBlock(ref block);
foreach (var slot in Slots.Where(x => x.Kind == SlotKind.Value))
{
var symbolsToReplace = block.DescendantNodes()
.OfType <IdentifierNameSyntax>()
.Where(x => x.Identifier.Text == slot.Name)
.Where(x =>
{
// We can never be on the right side of a member access
var memberAccess = (x.Parent as MemberAccessExpressionSyntax);
return(memberAccess == null || memberAccess.Expression == x);
})
.ToArray();
if (slot.Direction == SlotDirection.Input)
{
// Input
// Find expression
var expression = context.GenerateExpression(slot);
block = block.ReplaceNodes(symbolsToReplace, (x1, x2) => expression);
}
else
{
// Output
// Replace every reference of slot.Name into generated slotName
var slotName = context.GenerateLocalVariableName(slot.Name);
block = block.ReplaceNodes(symbolsToReplace, (x1, x2) => x1.WithIdentifier(Identifier(slotName)));
// Register a local var with generated name
context.RegisterLocalVariable(slot, slotName);
}
}
foreach (var statement in block.Statements)
{
context.AddStatement(statement);
}
}
}
