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using EC.Helper.RabbitFunc.Expressions;
using EC.Helper.RabbitFunc.Runtime;
namespace EC.Helper.RabbitFunc.Extern;
[ExternLambda]
internal class AtanLambdaExpression : SystemLambdaExpression
{
public AtanLambdaExpression()
: base(typeof(Math).GetMethod(nameof(Math.Atan), new Type[] { typeof(double) }), "atan", new BodyExpression(),
Expression.Parameter(typeof(double), "x"))
{ }
private class BodyExpression : Expression
{
public override object Eval(RuntimeContext context)
{
return Math.Atan(ParameterExpression.Access<double>(context, "x"));
}
}
}