Ada 95 Quality and Style Guide | Chapter 10 |
10.6.1 Aggregates for Type Extensionsguideline
Use only simple aggregates when measured performance indicates. example
type Parent is tagged record C1 : Float; C2 : Float; end record; type Extension is new Parent with record C3 : Float; C4 : Float; end record; Parent_Var : Parent := (C1 => Float_Var1, C2 => Float_Var2); Exten_Var : Extension; ... -- Simple aggregate -- (See ACES V2.0, test "a9_ob_simp_aggregate_02") Exten_Var := (C1 => Float_Var1, C2 => Float_Var2, C3 => Float_Var3, C4 => Float_Var4); -- Extension aggregate -- (See ACES V2.0, test "a9_ob_ext_aggregate_02") Exten_Var := (Parent_Var with C3 => Float_Var3, C4 => Float_Var4);rationale
Determine the impact of using extension aggregates. There may be a significant performance difference between evaluation of simple aggregates and evaluation of extension aggregates.
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