We override this, because XMLDecls and DocTypes must go at the start of the
document
# File lib/rexml/document.rb, line 66
def add( child )
if child.kind_of? XMLDecl
@children.unshift child
child.parent = self
elsif child.kind_of? DocType
# Find first Element or DocType node and insert the decl right
# before it. If there is no such node, just insert the child at the
# end. If there is a child and it is an DocType, then replace it.
insert_before_index = 0
@children.find { |x|
insert_before_index += 1
x.kind_of?(Element) || x.kind_of?(DocType)
}
if @children[ insert_before_index ] # Not null = not end of list
if @children[ insert_before_index ].kind_of DocType
@children[ insert_before_index ] = child
else
@children[ index_before_index-1, 0 ] = child
end
else # Insert at end of list
@children[insert_before_index] = child
end
child.parent = self
else
rv = super
raise "attempted adding second root element to document" if @elements.size > 1
rv
end
end
