protected static int DetermineConstantInsertPosition(
SyntaxList<MemberDeclarationSyntax> oldMembers,
SyntaxList<MemberDeclarationSyntax> newMembers)
{
// 1) Place the constant after the last constant.
//
// 2) If there is no constant, place it before the first field
//
// 3) If the first change is before either of those, then place before the first
// change
//
// 4) Otherwise, place it at the start.
var index = 0;
var lastConstantIndex = oldMembers.LastIndexOf(IsConstantField);
if (lastConstantIndex >= 0)
{
index = lastConstantIndex + 1;
}
else
{
var firstFieldIndex = oldMembers.IndexOf(member => member is FieldDeclarationSyntax);
if (firstFieldIndex >= 0)
{
index = firstFieldIndex;
}
}
var firstChangeIndex = DetermineFirstChange(oldMembers, newMembers);
if (firstChangeIndex >= 0)
{
index = Math.Min(index, firstChangeIndex);
}
return index;
}
