Identifier 'fifo' has not been declared yet. If this error is not expected, please check if you have set `default_nettype to none.
时间: 2024-03-15 20:42:11 浏览: 71
这个错误提示通常表示你在使用变量 `fifo` 之前没有对其进行声明或定义。可能是因为你忘记了包含相关的头文件或定义了错误的作用域。你可以检查你的代码,确保你已经正确地声明或定义了 `fifo`。如果你使用了某个库,还需要确保已经正确地包含了相关的头文件。如果你无法解决这个问题,可以尝试搜索类似的错误信息或者咨询相关的开发人员或社区。
相关问题
module test; typedef struct packed { logic [9:-1][2:0] a; ///REQ-EXT-10001, REQ-EXT-10004 } ST1; typedef struct { ST1 st1; ST1 st2[]; logic [7:0] b; //REQ-EXT-10002; }ST4 initial begin ST4 st4; st4.st1.a[0][0]=1; for (int i=0; i<5; i++) begin st4.st1.push_back(i+1); end st4_1.b = 8'hAA; $display("%", st2); //CHECK-001:'{a:'h1}, st2:'{'a:'h1}, '{a:'h0},'{a:h1}}} end endmodule when compiled by vcs, it reports 3 errors, the errors are: Error-[MFNF] Member not found sc_assignment_pattern_030.sv,29 "st4.st1." Could not find member 'push_back' in structure 'ST1', at "sc_assignment_pattern_030.sv",15. Error-[XMRE] Cross-module reference resolution error sc_assignment_pattern_030.sv,31 Error found while trying to resolve cross-module reference.token 'st4_1'. Originating module 'test'. Source info:st4_1.b = 8'haa; Error-[IND] Identifier 'st2' has not been declared yet. If this error is not expected, please check if you have set 'default_nettype to none. How should I fix these 3 errors so that this piece of system verilog code can be compiled succeessfully by vcs? thanks a lot
Based on the code snippet provided, there are three errors that need to be fixed:
1. "Could not find member 'push_back' in structure 'ST1'"
This error occurs because 'push_back' is not a member of 'ST1'. It is actually a member of an array of 'ST1' structures. To fix this error, you need to change the code to create an array of 'ST1' structures and then call 'push_back' on the array instead of 'ST1':
```
ST4 st4;
st4.st1.a[0][0]=1;
for (int i=0; i<5; i++) begin
ST1 tmp;
tmp.a[0][0] = i+1;
st4.st2.push_back(tmp);
end
```
2. "Error found while trying to resolve cross-module reference.token 'st4_1'"
This error occurs because 'st4_1' is not declared anywhere in the code. To fix this error, you need to change the code to use 'st4' instead of 'st4_1':
```
ST4 st4;
st4.st1.a[0][0]=1;
for (int i=0; i<5; i++) begin
ST1 tmp;
tmp.a[0][0] = i+1;
st4.st2.push_back(tmp);
end
st4.b = 8'hAA;
$display("%", st4.st2); //CHECK-001:'{a:'h1}, st2:'{'a:'h1}, '{a:'h0},'{a:h1}}}
```
3. "Identifier 'st2' has not been declared yet"
This error occurs because 'st2' is not declared anywhere in the code. To fix this error, you need to change the code to use 'st4.st2' instead of 'st2':
```
ST4 st4;
st4.st1.a[0][0]=1;
for (int i=0; i<5; i++) begin
ST1 tmp;
tmp.a[0][0] = i+1;
st4.st2.push_back(tmp);
end
st4.b = 8'hAA;
$display("%", st4.st2); //CHECK-001:'{a:'h1}, st2:'{'a:'h1}, '{a:'h0},'{a:h1}}}
```
Identifier 'total_qty' has already been declared.
This error message means that you have declared the identifier 'total_qty' more than once in your code.
For example, if you have the following code:
```
let total_qty = 10;
let total_qty = 20;
```
The second line will cause the error because 'total_qty' has already been declared in the first line.
To fix this error, you need to ensure that you are only declaring the identifier once in your code. You can either remove the duplicate declaration or give the identifier a different name.