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Replace Instances<T>::empty() with Instances<T>::default() and make it return an empty table for vector data instead of one empty row (#2689)
Make Instances<T>::default() return an empty table for everything, even vector, and replace ::empty() with ::default()
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@@ -46,7 +46,7 @@ fn union<'a>(vector_data: impl DoubleEndedIterator<Item = InstanceRef<'a, Vector
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// Reverse vector data so that the result style is the style of the first vector data
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let mut vector_data_reversed = vector_data.rev();
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let mut result_vector_data_table = VectorDataTable::empty();
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let mut result_vector_data_table = VectorDataTable::default();
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result_vector_data_table.push(vector_data_reversed.next().map(|x| x.to_instance_cloned()).unwrap_or_default());
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let mut first_instance = result_vector_data_table.instance_mut_iter().next().expect("Expected the one instance we just pushed");
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@@ -79,7 +79,7 @@ fn union<'a>(vector_data: impl DoubleEndedIterator<Item = InstanceRef<'a, Vector
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fn subtract<'a>(vector_data: impl Iterator<Item = InstanceRef<'a, VectorData>>) -> VectorDataTable {
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let mut vector_data = vector_data.into_iter();
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let mut result_vector_data_table = VectorDataTable::empty();
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let mut result_vector_data_table = VectorDataTable::default();
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result_vector_data_table.push(vector_data.next().map(|x| x.to_instance_cloned()).unwrap_or_default());
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let mut first_instance = result_vector_data_table.instance_mut_iter().next().expect("Expected the one instance we just pushed");
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@@ -111,7 +111,7 @@ fn subtract<'a>(vector_data: impl Iterator<Item = InstanceRef<'a, VectorData>>)
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fn intersect<'a>(vector_data: impl DoubleEndedIterator<Item = InstanceRef<'a, VectorData>>) -> VectorDataTable {
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let mut vector_data = vector_data.rev();
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let mut result_vector_data_table = VectorDataTable::empty();
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let mut result_vector_data_table = VectorDataTable::default();
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result_vector_data_table.push(vector_data.next().map(|x| x.to_instance_cloned()).unwrap_or_default());
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let mut first_instance = result_vector_data_table.instance_mut_iter().next().expect("Expected the one instance we just pushed");
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@@ -191,7 +191,7 @@ fn difference<'a>(vector_data: impl DoubleEndedIterator<Item = InstanceRef<'a, V
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}
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fn flatten_vector_data(graphic_group_table: &GraphicGroupTable) -> VectorDataTable {
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let mut result_table = VectorDataTable::empty();
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let mut result_table = VectorDataTable::default();
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for element in graphic_group_table.instance_ref_iter() {
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match element.instance.clone() {
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