tree: Improve error for pre-existing node
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1 changed files with 1 additions and 1 deletions
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@ -48,7 +48,7 @@ func (t Tree) Equals(other *Tree) bool {
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func (t *Tree) Insert(node *Node) error {
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pos, _, err := t.binarySearch(node.Name)
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if err == nil {
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return errors.New("node already present")
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return errors.Errorf("node %q already present", node.Name)
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}
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// https://code.google.com/p/go-wiki/wiki/SliceTricks
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