private static void ValidateSettableFieldOrPropertyMember(MemberInfo member, out Type memberType)
{
var fi = member as FieldInfo;
if (fi == null)
{
var pi = member as PropertyInfo;
if (pi == null)
{
throw Error.ArgumentMustBeFieldInfoOrPropertInfo();
}
if (!pi.CanWrite)
{
throw Error.PropertyDoesNotHaveSetter(pi);
}
memberType = pi.PropertyType;
}
else
{
memberType = fi.FieldType;
}
}
/// <summary>
/// Creates a <see cref="MemberInitializer"/> binding the specified value to the given member.
/// </summary>
/// <param name="member">The <see cref="MemberInfo"/> for the member which is being assigned to.</param>
/// <param name="expression">The value to be assigned to <paramref name="member"/>.</param>
/// <returns>The created <see cref="MemberInitializer"/>.</returns>
public static MemberInitializer MemberInitializer(MemberInfo member, Expression expression)
{
RequiresNotNull(member, nameof(member));
//
// NB: System.Linq.Expressions fails to checks for static members in ValidateSettableFieldOrPropertyMember.
//
// class Foo { public static int Bar { get; set; } }
//
// Expression.Lambda<Func<Foo>>(
// Expression.MemberInit(
// Expression.New(typeof(Foo)),
// Expression.Bind(typeof(Foo).GetProperty("Bar"), Expression.Constant(1))
// )
// ).Compile()
//
// throws 'System.Security.VerificationException: Operation could destabilize the runtime.'
//
// We add this check here.
//
Type memberType;
switch (member)
{
case FieldInfo f:
memberType = f.FieldType;
if (f.IsStatic)
{
throw Error.MemberInitializerMemberMustNotBeStatic(member.Name);
}
break;
case PropertyInfo p:
memberType = p.PropertyType;
var accessor = p.GetGetMethod(nonPublic: true) ?? p.GetSetMethod(nonPublic: true);
if (accessor == null)
{
throw LinqError.PropertyDoesNotHaveAccessor(p);
}
if (accessor.IsStatic)
{
throw Error.MemberInitializerMemberMustNotBeStatic(member.Name);
}
if (p.GetIndexParameters().Length > 0)
{
throw Error.MemberInitializerMemberMustNotBeIndexer(member.Name);
}
break;
default:
throw LinqError.ArgumentMustBeFieldInfoOrPropertInfo();
}
RequiresCanRead(expression, nameof(expression));
//
// NB: We don't check here for an accessible setter in order to support anonymous types where
// the getter is specified instead.
//
if (!memberType.IsAssignableFrom(expression.Type))
{
throw LinqError.ArgumentTypesMustMatch();
}
if (member.DeclaringType == null)
{
throw Error.NotAMemberOfAnyType(member);
}
ValidateType(member.DeclaringType);
return(new MemberInitializer(member, expression));
}
