private static void CheckArgumentExpressionIsValid(Expression expression)
{
expression = GetExpressionWithoutConversion(expression);
if (expression is MemberExpression memberExpression && IsMemberOfA(memberExpression.Member))
{
// It's A._, or A.Ignore, so it's safe.
return;
}
var visitor = new ArgumentConstraintExpressionVisitor();
if (expression is MethodCallExpression methodCallExpression)
{
// A method call. It might be A<T>.That.Matches, or one of the other extension methods, so don't
// check the method node itself. Instead, look at all the arguments (except the first, if it's an
// extension method).
int firstArgumentToCheck = IsArgumentConstraintManagerExtensionMethod(methodCallExpression) ? 1 : 0;
for (var index = firstArgumentToCheck; index < methodCallExpression.Arguments.Count; index++)
{
visitor.Visit(methodCallExpression.Arguments[index]);
}
}
else
{
// An unknown kind of expression - could be a constructor, or almost anything else. Play it safe and
// check it out.
visitor.Visit(expression);
}
}
private static void CheckArgumentExpressionIsValid(Expression expression)
{
expression = GetExpressionWithoutConversion(expression);
if (expression is MemberExpression memberExpression && IsMemberOfA(memberExpression.Member))
{
// It's A._, or A.Ignore, so it's safe.
return;
}
var visitor = new ArgumentConstraintExpressionVisitor();
if (expression is MethodCallExpression methodCallExpression)
{
// A method call. It might be A<T>.That.Matches, or one of the other extension methods, so don't
// check the method node itself. Instead, look at all the arguments (except the first, if it's an
// extension method).
int argumentsToSkip = methodCallExpression.Method.IsDefined(typeof(ExtensionAttribute), false) ? 1 : 0;
foreach (var argument in methodCallExpression.Arguments.Skip(argumentsToSkip))
{
visitor.Visit(argument);
}
}
else
{
// An unknown kind of expression - could be a constructor, or almost anything else. Play it safe and
// check it out.
visitor.Visit(expression);
}
}
