private static List <Ref <IHelperDescriptor <HelperOptions> > > GenerateHelpers(ClosureBuilder builder, int count)
{
var helpers = new List <Ref <IHelperDescriptor <HelperOptions> > >();
for (int i = 0; i < count; i++)
{
var helper = new Ref <IHelperDescriptor <HelperOptions> >();
builder.Add(Const(helper));
helpers.Add(helper);
}
return(helpers);
}
private static List <PathInfo> GeneratePaths(ClosureBuilder builder, int count)
{
var paths = new List <PathInfo>();
for (int i = 0; i < count; i++)
{
var pathInfo = PathInfo.Parse($"{i}");
builder.Add(Const(pathInfo));
paths.Add(pathInfo);
}
return(paths);
}
private static List <object> GenerateOther(ClosureBuilder builder, int count)
{
var others = new List <object>();
for (int i = 0; i < count; i++)
{
var other = new object();
builder.Add(Const(other));
others.Add(other);
}
return(others);
}
public Expression <T> Invoke <T>(Expression <T> expression) where T : Delegate
{
var constants = new List <ConstantExpression>();
var closureCollectorVisitor = new ClosureCollectorVisitor(constants);
expression = (Expression <T>)closureCollectorVisitor.Visit(expression);
if (constants.Count == 0)
{
return(expression);
}
var closureBuilder = new ClosureBuilder();
for (var index = 0; index < constants.Count; index++)
{
var value = constants[index];
closureBuilder.Add(value);
}
var closureDefinition = closureBuilder.Build(out var closure);
var closureVisitor = new ClosureVisitor(closureDefinition);
expression = (Expression <T>)closureVisitor.Visit(expression);
var block = Block()
.Parameter(closureDefinition.Key)
.Line(Expression.Assign(closureDefinition.Key, Arg(closure)));
if (expression !.Body is BlockExpression blockExpression)
{
var variables = blockExpression.Variables;
for (var index = 0; index < blockExpression.Variables.Count; index++)
{
block.Parameter(variables[index]);
}
block.Lines(blockExpression.Expressions);
}