SystemVerilog中可以嵌套的数据结构

SystemVerilog中除了数组、队列和关联数组等数据结构，这些数据结构还可以嵌套。

 

module top;
 typedef int Qint[$];
 // dynamic array of queues
 Qint DynamicQ[ ]; // same as int DynamicQ[ ][$];
 // queue of queues
 Qint QueueQ[$]; // same as int QueueQ[$][$];
 // associative array of queues
 Qint AssociativeQ[string]; // same as
 //int AssociativeQ[string][$];
 initial begin
 // Dynamic array of 2 queues
 DynamicQ = new[2]; //Create dynamic array of size 2 
(queues)
 // initialize queue 0 with three entries
 DynamicQ[0] = {1,2,3};
 // Push onto queue 1
 DynamicQ[1].push_back(1);
 
 $display("DynamicQ = %p", DynamicQ);
 //push/initialize queue of 3 queues
 QueueQ[0].push_front(7);
 QueueQ[1].push_back(6);
 QueueQ[2].push_back(1);
 $display("QueueQ = %p", QueueQ);
 // Associative array of queues
 AssociativeQ["one"].push_back(5);
 AssociativeQ["two"] = {5,6,7,8};
 $display("AssociativeQ = %p", AssociativeQ);
 end
 endmodule : top

 

仿真log:

 

DynamicQ = '{'{1, 2, 3} , '{1} }
QueueQ = '{'{7} , '{6} , '{1} }
AssociativeQ = '{"one":'{5} , "two":'{5, 6, 7, 8} }

 

在上面的例子中，我们定义了三种不同类型的数据结构。队列动态数组、队列队列和队列关联数组:

 

 // dynamic array of queues
 Qint DynamicQ[ ]; // same as int DynamicQ[ ][$];
 // queue of queues
 Qint QueueQ[$]; // same as int QueueQ[$][$];
 // associative array of queues
 Qint AssociativeQ[string]; // same as
 //int AssociativeQ[string][$];

 

初始化这个队列动态数组大小为2，然后分别初始化这两个数组：

 

 DynamicQ = new[2]; //Dynamic Array size of 2. 
 DynamicQ[0] = {1,2,3}; 
 DynamicQ[1].push_back(1);

 

初始化队列队列

 

 QueueQ[0].push_front(7);
 QueueQ[1].push_back(6);
 QueueQ[2].push_back(1);

 

初始化队列关联数组

 

 //Queue at associative index/key "one"
 AssociativeQ["one"].push_front(5);
 //Queue at associative index/key "two"
 AssociativeQ["two"] = {5,6,7,8};

 

审核编辑：刘清