func (self *FinderNode) Add(other_ types.FuObject) (types.FuObject, error) {
var result types.FuObject
switch other := other_.(type) {
case types.FuList:
// <pat> + [a, b, c] = [<pat>, a, b, c]
// (a, b, c must all be Nodes)
members := make([]types.FuObject, 1+len(other.List()))
members[0] = self
for i, obj := range other.List() {
switch obj := obj.(type) {
case types.FuString:
// <*.c> + ["extra/stuff.c"] should just work
members[i+1] = NewFileNode(obj.ValueString())
case Node:
members[i+1] = obj
default:
return types.UnsupportedAdd(
self, other, "second operand contains "+obj.Typename())
}
}
result = newListNode(members...)
case types.FuString:
// <pat> + "foo" = [<pat>, FileNode("foo")]
result = newListNode(self, NewFileNode(other.ValueString()))
case Node:
result = newListNode(self, other)
default:
return types.UnsupportedAdd(self, other, "")
}
return result, nil
}
func (self *ListNode) Add(other types.FuObject) (types.FuObject, error) {
values := self.List()
otherlist := other.List()
result := make([]types.FuObject, len(values)+len(otherlist))
for i, obj := range values {
result[i] = obj
}
j := len(values)
for i, obj := range otherlist {
if _, ok := obj.(Node); !ok {
return types.UnsupportedAdd(
self, other, "second operand contains "+obj.Typename())
}
result[j+i] = obj
}
return newListNode(result...), nil
}
func (self PythonCallable) Add(other types.FuObject) (types.FuObject, error) {
return types.UnsupportedAdd(self, other, "")
}