[C#/LINQ] Expression 클래스 : 람다식 만들기

■ Expression<T> 클래스를 사용해 람다식을 만드는 방법을 보여준다.

▶ 예제 코드 (C#)


using System;
using System.Linq.Expressions;

ParameterExpression paremeterExpression = Expression<Func<int, bool>>.Parameter(typeof(int), "p");

Expression<Func<int, bool>> expression = Expression<Func<int, bool>>.Lambda<Func<int, bool>>
(
    Expression<Func<int, bool>>.LessThan
    (
        paremeterExpression,
        Expression<Func<int, bool>>.Constant(5)
    ),
    paremeterExpression
);

Func<int, bool> function = (Func<int, bool>)expression.Compile();

bool result = function(4);

Console.WriteLine(result);

using System;

using System.Linq.Expressions;

ParameterExpression paremeterExpression = Expression<Func<int, bool>>.Parameter(typeof(int), "p");

Expression<Func<int, bool>> expression = Expression<Func<int, bool>>.Lambda<Func<int, bool>>

(

Expression<Func<int, bool>>.LessThan

(

paremeterExpression,

Expression<Func<int, bool>>.Constant(5)

paremeterExpression

);

Func<int, bool> function = (Func<int, bool>)expression.Compile();

bool result = function(4);

Console.WriteLine(result);

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