internal static Func <StrongBox <object>[], Delegate> BindLambda(LambdaExpression lambda, Dictionary <ParameterExpression, LocalVariable> closureVariables)
{
ParameterExpression expression;
LightLambdaClosureVisitor visitor = new LightLambdaClosureVisitor(closureVariables, expression = Expression.Parameter(typeof(StrongBox <object>[]), "closure"));
lambda = (LambdaExpression)visitor.Visit(lambda);
return(Expression.Lambda <Func <StrongBox <object>[], Delegate> >(lambda, new ParameterExpression[] { expression }).Compile());
}
/// <summary>
/// Walks the lambda and produces a higher order function, which can be
/// used to bind the lambda to a closure array from the interpreter.
/// </summary>
/// <param name="lambda">The lambda to bind.</param>
/// <param name="closureVariables">Variables which are being accessed defined in the outer scope.</param>
/// <returns>A delegate that can be called to produce a delegate bound to the passed in closure array.</returns>
internal static Func <StrongBox <object>[], Delegate> BindLambda(LambdaExpression lambda, Dictionary <ParameterExpression, LocalVariable> closureVariables)
{
// 1. Create rewriter
var closure = Expression.Parameter(typeof(StrongBox <object>[]), "closure");
var visitor = new LightLambdaClosureVisitor(closureVariables, closure);
// 2. Visit the lambda
lambda = (LambdaExpression)visitor.Visit(lambda);
// 3. Create a higher-order function which fills in the parameters
var result = Expression.Lambda <Func <StrongBox <object>[], Delegate> >(lambda, closure);
// 4. Compile it
return(result.Compile());
}
