public IExpressionNode Visit(ArrowAnonymFunctionSyntaxNode arrowAnonymFunNode)
{
if (arrowAnonymFunNode.Definition == null)
{
throw ErrorFactory.AnonymousFunDefinitionIsMissing(arrowAnonymFunNode);
}
if (arrowAnonymFunNode.Body == null)
{
throw ErrorFactory.AnonymousFunBodyIsMissing(arrowAnonymFunNode);
}
//Anonym fun arguments list
var argumentLexNodes = arrowAnonymFunNode.ArgumentsDefinition;
//Prepare local variable scope
//Capture all outerscope variables
var localVariables = new VariableDictionary(_variables.GetAllSources());
var arguments = new VariableSource[argumentLexNodes.Length];
var argIndex = 0;
foreach (var arg in argumentLexNodes)
{
//Convert argument node
var varNode = FunArgumentExpressionNode.CreateWith(arg);
var source = VariableSource.CreateWithStrictTypeLabel(varNode.Name, varNode.Type, arg.Interval, isOutput: false);
//collect argument
arguments[argIndex] = source;
argIndex++;
//add argument to local scope
if (!localVariables.TryAdd(source))
{ //Check for duplicated arg-names
//If outer-scope contains the conflict variable name
if (_variables.GetSourceOrNull(varNode.Name) != null)
{
throw ErrorFactory.AnonymousFunctionArgumentConflictsWithOuterScope(varNode.Name, arrowAnonymFunNode.Interval);
}
else //else it is duplicated arg name
{
throw ErrorFactory.AnonymousFunctionArgumentDuplicates(varNode, arrowAnonymFunNode.Definition);
}
}
}
var body = arrowAnonymFunNode.Body;
return(BuildAnonymousFunction(arrowAnonymFunNode.Interval, body, localVariables, arguments));
}
public static Exception AnonymousFunctionArgumentDuplicates(FunArgumentExpressionNode argNode, ISyntaxNode funDefinition)
=> new FunParseException(557, $"'Argument name '{argNode.Name}' of anonymous fun duplicates ", argNode.Interval);
