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31.12 Typespec</div>
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NOTES </p>
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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: </p><div class="Element170">
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<div class="Element13"><div class="Element12" id="code01060"><pre class="Element12">typedef enum bit [0:2] {red, yellow, blue} primary_colors;
typdef primary_colors colors;</pre></div></div>
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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. </p>
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2) vpiIndexTypespec relation is present only on associative arrays and returns the type that is used as the key into the associative array. </p>
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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. </p>
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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: </p><div class="Element170">
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<div class="Element13"><div class="Element12" id="code01061"><pre class="Element12">typedef struct {
struct {
int a;
}B
} C;</pre></div></div>
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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. </p>
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6) If a type is defined as an alias of another type, it inherits the vpiType of this other type. For example: </p><div class="Element170">
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<div class="Element13"><div class="Element12" id="code01062"><pre class="Element12">typedef time my_time;
my_time t;</pre></div></div>
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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”.</p></div>
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