21 lines
764 B
C#
21 lines
764 B
C#
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using System.Linq.Expressions;
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namespace DD.Persistence.Database.Helpers;
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public class ParameterReplacerVisitor : ExpressionVisitor
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{
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private readonly Expression _newExpression;
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private readonly ParameterExpression _oldParameter;
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private ParameterReplacerVisitor(ParameterExpression oldParameter, Expression newExpression)
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{
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_oldParameter = oldParameter;
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_newExpression = newExpression;
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}
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internal static Expression Replace(Expression expression, ParameterExpression oldParameter, Expression newExpression)
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=> new ParameterReplacerVisitor(oldParameter, newExpression).Visit(expression);
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protected override Expression VisitParameter(ParameterExpression p)
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=> p == _oldParameter ? _newExpression : p;
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}
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