public ReplaceParametersVisitorTest()
{
_dictionary = new Dictionary <string, object>()
{
{ "i", 10 },
{ "a", "asd" },
{ "b", 10.0 },
{ "c", new object() },
};
_visitor = new ReplaceParametersVisitor(_dictionary);
}
/// <summary>
/// Replace multiple parameters by items in <paramref name="newExpressions"/>.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="newExpressions">The dictionary with replacements.</param>
/// <returns>New expression with applied replacement.</returns>
public static Expression ReplaceParameters(
this Expression expression,
IReadOnlyDictionary <ParameterExpression, Expression> newExpressions)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
if (newExpressions == null)
{
throw new ArgumentNullException(nameof(newExpressions));
}
var visitor = new ReplaceParametersVisitor(newExpressions);
return(visitor.Visit(expression));
}
/// <summary>
/// Replaces parameter in expression using replace function
/// </summary>
public static Expression ReplaceParameters(Expression expression, Func <ParameterExpression, Expression> replace)
{
var visitor = new ReplaceParametersVisitor(replace);
return(visitor.Visit(expression));
}