private CommandProcessorBase PrepareFromAst(ExecutionContext context, out string resolvedCommandName)
{
string str;
FunctionDefinitionAst ast2;
ExportVisitor astVisitor = new ExportVisitor();
Ast parent = this._commandAst;
while (parent.Parent != null)
{
parent = parent.Parent;
}
parent.Visit(astVisitor);
resolvedCommandName = this._commandAst.GetCommandName();
CommandProcessorBase base2 = null;
int num = 0;
while (astVisitor.DiscoveredAliases.TryGetValue(resolvedCommandName, out str))
{
num++;
if (num > 5)
{
break;
}
resolvedCommandName = str;
}
if (astVisitor.DiscoveredFunctions.TryGetValue(resolvedCommandName, out ast2))
{
ScriptBlock scriptblock = ast2.IsWorkflow ? CreateFakeScriptBlockForWorkflow(ast2) : new ScriptBlock(ast2, ast2.IsFilter);
base2 = CommandDiscovery.CreateCommandProcessorForScript(scriptblock, context, true, context.EngineSessionState);
}
return(base2);
}
public static void LoadExportVisitors(string gameType = "Unreal", Assembly loadFrom = null)
{
if ((object)loadFrom == null)
{
loadFrom = Assembly.GetExecutingAssembly();
}
Type baseType = typeof(IExportObject);
foreach (Type item in from x in loadFrom.GetTypes()
where baseType.IsAssignableFrom(x) && x.GetCustomAttribute <CategoryAttribute>()?.Category == gameType
select x)
{
string text = item.GetCustomAttribute <DescriptionAttribute>()?.Description;
if (string.IsNullOrWhiteSpace(text))
{
throw new InvalidDataException(item.FullName + " has no DescriptionAttribute!");
}
ExportVisitor exportVisitor = (from x in item.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Static | BindingFlags.Public).Select(CreateExportDelegate)
where x != null
select x).FirstOrDefault();
ExportVisitors[text] = (exportVisitor ?? throw new NotImplementedException(item.FullName + " has no Export Delegate!"));
}
}
public void ExportTo(ExportVisitor visitor)
{
visitor.Visit(this, ActionExtensions.NoOp);
}
private CommandProcessorBase PrepareFromAst(ExecutionContext context, out string resolvedCommandName)
{
// Analyze the Ast
var exportVisitor = new ExportVisitor(forCompletion: true);
Ast ast = _commandAst;
while (ast.Parent != null)
{
ast = ast.Parent;
}
ast.Visit(exportVisitor);
resolvedCommandName = _commandAst.GetCommandName();
CommandProcessorBase commandProcessor = null;
string alias;
int resolvedAliasCount = 0;
while (exportVisitor.DiscoveredAliases.TryGetValue(resolvedCommandName, out alias))
{
resolvedAliasCount += 1;
if (resolvedAliasCount > 5)
break; // give up, assume it's recursive
resolvedCommandName = alias;
}
FunctionDefinitionAst functionDefinitionAst;
if (exportVisitor.DiscoveredFunctions.TryGetValue(resolvedCommandName, out functionDefinitionAst))
{
// We could use the IAstToScriptBlockConverter to get the actual script block, but that can be fairly expensive for workflows.
// IAstToScriptBlockConverter is public, so we might consider converting non-workflows, but the interface isn't really designed
// for Intellisense, so we can't really expect good performance, so instead we'll just fall back on the actual
// parameters we see in the ast.
var scriptBlock = functionDefinitionAst.IsWorkflow
? CreateFakeScriptBlockForWorkflow(functionDefinitionAst)
: new ScriptBlock(functionDefinitionAst, functionDefinitionAst.IsFilter);
commandProcessor = CommandDiscovery.CreateCommandProcessorForScript(scriptBlock, context, true, context.EngineSessionState);
}
return commandProcessor;
}
public void ExportTo(ExportVisitor visitor)
{
visitor.Visit(this, ActionExtensions.NoOp);
}
