25 lines
963 B
C#
25 lines
963 B
C#
using System;
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using System.Linq.Expressions;
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namespace Umbraco.Core
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{
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internal static class ExpressionExtensions
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{
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public static Expression<Func<T, bool>> True<T>() { return f => true; }
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public static Expression<Func<T, bool>> False<T>() { return f => false; }
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public static Expression<Func<T, bool>> Or<T>(this Expression<Func<T, bool>> left, Expression<Func<T, bool>> right)
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{
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var invokedExpr = Expression.Invoke(right, left.Parameters);
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return Expression.Lambda<Func<T, bool>>(Expression.OrElse(left.Body, invokedExpr), left.Parameters);
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}
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public static Expression<Func<T, bool>> And<T>(this Expression<Func<T, bool>> left, Expression<Func<T, bool>> right)
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{
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var invokedExpr = Expression.Invoke(right, left.Parameters);
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return Expression.Lambda<Func<T, bool>> (Expression.AndAlso(left.Body, invokedExpr), left.Parameters);
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}
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}
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}
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