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21 lines
631 B
21 lines
631 B
2 years ago
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using EC.Helper.RabbitFunc.Expressions;
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using EC.Helper.RabbitFunc.Runtime;
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namespace EC.Helper.RabbitFunc.Extern;
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[ExternLambda]
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internal class ExpLambdaExpression : SystemLambdaExpression
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{
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public ExpLambdaExpression()
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: base(typeof(Math).GetMethod(nameof(Math.Exp), new Type[] { typeof(double) }), "exp", new BodyExpression(),
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Expression.Parameter(typeof(double), "x"))
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{ }
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private class BodyExpression : Expression
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{
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public override object Eval(RuntimeContext context)
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{
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return Math.Exp(ParameterExpression.Access<double>(context, "x"));
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}
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}
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}
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