Automatic guessing on attributes happens when Cxx Designer is generating the code for a single attribute for which the automatic generation flag is set.
For attributes, which in most cases are supposed to be primitive types (integer, float, char, boolean), the automatic guessing algorithm will favour declaration by value. However, pointer declaration will be used to deal with the 0 minimum cardinality cases.
For automatic guessing on attributes, the relevant information is as follows:
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the kind of the type (datatype or class)
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cardinality
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ordering/uniqueness tags
The following list shows the generated declaration for an attribute named "att".
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Association end type: integer
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0..1:int* att; -
1..1:int att; -
0..* :std::vector<int> att; -
1..* :std::vector<int> att; -
n..m:std::vector<int> att;
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-
Association end type: string
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0..1:std::string* att; -
1..1:std::string att; -
0..* :std::vector<std::string> att; -
1..* :std::vector<std::string> att; -
n..m:std::vector<std::string> att;
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Association end type: MyClass
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0..1:MyClass* att; -
1..1:MyClass att; -
0..* :std::vector<MyClass*> att; -
1..* :std::vector<MyClass*> att; -
n..m:std::vector<MyClass*> att;
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Association end type: MyDatatype isPrimitive=true
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0..1:MyDatatype* att; -
1..1:MyDatatype att; -
0..* :std::vector<MyDatatype> att; -
1..* :std::vector<MyDatatype> att; -
n..m:std::vector<MyDatatype> att;
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Association end type: MyDatatype isPrimitive=false
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0..1:MyDatatype* att; -
1..1:MyDatatype att; -
0..* :std::vector<MyDatatype*> att; -
1..* :std::vector<MyDatatype*> att; -
n..m:std::vector<MyDatatype*> att;
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Note 1: Where the table states integer, this can be any basic type (integer, char, float, boolean).
Note 2: The std::vector is replaced by:
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std::hash_set when the "Is unique" option is set on the attribute
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std::set when both the "Is ordered" and "Is unique" options are set on the attribute
Note 3: An element typed undefined is generated as void*.