Question

NOTES

1) If the vpiTypedef is TRUE and the typedef creates an alias of another typedef, then the vpiTypedefAlias shall return a non null handle which represents the handle to the aliased typedef. For example:

typedef enum bit [0:2] {red, yellow, blue} primary_colors;
typdef primary_colors colors;

If “h1” is a handle to the typespec colors, its vpiType shall return a vpiEnumTypespec, the vpiTypedef property shall be true, the vpiName property shall return “colors”, the vpiTypedefAlias shall return a handle “h2” to the typespec “primary_colors” of vpiType vpiEnumTypespec. The vpiTypedef property shall be false for h2 and its vpiTypedefAlias shall return null.

2) vpiIndexTypespec relation is present only on associative arrays and returns the type that is used as the key into the associative array.

3) If the type of a type is vpiStruct or vpiUnion, then you can iterate over numbers to obtain the structure of the user-defined type. For each member the typespec relation from the member will detail its type.

4) The name of a typedef may be the empty string if the typedef is representing the type of a typedef field defined inline rather than via a typedef. For example:

typedef struct {
    struct {
        int a;
    }B
} C;

5) The typedef C has vpiTypedefType vpiStruct, a single field named B with vpiTypedefType vpiStruct. Obtaining the typedef of field B, you will obtain a typedef with no name and a single field, named "a" with vpiTypedefType of vpiInt.

6) If a type is defined as an alias of another type, it inherits the vpiType of this other type. For example:

typedef time my_time;
my_time t;

The vpiTypespec of the variable named “t” shall return a handle h1 to the typespec “my_time” whose vpiType shall be a vpiTimeTypespec. The vpiTypedefAlias applied to handle h1 shall return a typespec handle h2 to the predefined type “time”.