public static Expression <Func <TResult> > ApplyParameter <TParameter0, TResult>(this Expression <Func <TParameter0, TResult> > func, TParameter0 parameter0Value)
{
var body = new ReplaceParameterVisitor(new Dictionary <ParameterExpression, Expression>()
{
{ func.Parameters[0], Expression.Constant(parameter0Value, func.Parameters[0].Type) }
}).Visit(func.Body);
// ReSharper disable once AssignNullToNotNullAttribute
return(Expression.Lambda <Func <TResult> >(body));
}
public static LambdaExpression ApplyParameters(this LambdaExpression lambdaExpression, object[] parameterValues)
{
Dictionary <ParameterExpression, Expression> replacements = new Dictionary <ParameterExpression, Expression>();
for (var index = 0; index < parameterValues.Length; index++)
{
object parameterValue = parameterValues[index];
replacements.Add(lambdaExpression.Parameters[index], Expression.Constant(parameterValue, lambdaExpression.Parameters[index].Type));
}
var body = new ReplaceParameterVisitor(replacements).Visit(lambdaExpression.Body);
return(Expression.Lambda(body));
}
