I have a tool that produces .sv RAL files for use in a UVM testbench. The problem is that this file creates the register block as a package. My issue is that for my testbench, I want to import multiple .sv RAL files (representing different reg blocks).
To do this, I want to create a single package all_my_regs_pkg.sv and `include the other packages into this package. I get a compilation error and looking into it, it looks like there isn't support for nested packages in SystemVerilog.
So do I need to manually import each of the reg block packages when I want to use them? I suppose I could create a file with the imports and just `include it, but is this the only way?
SystemVerilog does not allow nesting of package declarations. The best thing for you do do is to define a file that is a list of package import statements and have users `include that file where needed.
The is another SV feature that allows you to chain package imports, but you have to explicitly export a symbol that you import into a package to be imported by the next package. See Section 26.6 Exporting imported names from packages in the 1800-2012 LRM
Related
I am looking to find unused imports in an umbrella architecture. The imports are used within swift files. These files receive their imports from Objective-C headers so a text based search would not work. I wrote a script that searches for imports and checks if they are used within the class through text. But the issue is that some imports do not have to be explicitly stated. For example, if we have a framework foo that we use by:
import foo
and that framework has
#import <Example/Example.h>
in its own umbrella header foo.h. I have access to Example, without explicitly importing it.
So the issue is that we cannot see if an import is unused because it does not have to be explicitly imported. Is there a way we can detect unused imports?
I created a text based script in python that searches through a code base and checks for imports that are not used. It would go through directories and look for specific imports, and if they are present check if they are actually being used within the class. I expected that this would work without considering the umbrella architecture. But because there are scenarios where imports do not have to be explicitly stated, this did not work.
How to Print all package variables in Perl.
I have 2 packages in same script, I want to get all the variables used in packageA in packageB
What problem are you trying to solve?
But, there are so many other design issues here.
If there's some central source of truth for values in your program, that package can provide an interface to request a value. This is what I tend to do.
They are package variables, so package B can just use the variables from package A: $A::some_var.
package A could export all of its variables to any other package that wants to use them. Several Perl modules, such as Socket and Fcntl, do this.
If package B is really just a specialization of package A, inheritance might be the answer. You still need an interface though.
I am using Modelica in my work, where I have modeled a system that contains many models. I want to make it simple to use by creating a package using " within" so this package contains all the models. What I want is to open the package instead of opening many models, which takes time.
Instead of doing everything by hand, I suggest to create your packages with a Modelica tool (OpenModelica, Dymola, SimulationX, ...).
The tool will automatically create the folder structure and the within lines in the .mo files for you. Doing it manually is not much fun.
You could e.g. use OMEdit (part of OpenModelica) to create your package structure as follow:
create your top-level package via File > New Modelica Class
insert sub-models and sub-packages in existing packages via right-click > New Modelica Class
According to this website http://omwebbook.openmodelica.org/
A package is simply a container or namespace for names of classes, functions, constants, and other allowed definitions. The package name is prefixed to all definitions in the package using standard dot notation. An import language construct is provided for Modelica packages.
the package can help us to gather components that build the main model together in same place inside it , just by clicking on the package you open all your components inside it.
to open a package in Modelica we follow the follwing instructions:
After creationg the package you will get a folder with the package name in the place that you chosed to saved it in it , when you open the folder you click on package in order to open your package .
hope this can be helpfull
Probably a basic mistake, but the cause is eluding me. I am trying to import a package, but I get an error saying it cannot be found or imported.
First I set the current directory to the parent directory of the package, and this does not work.
Second, the docs say that the parent folder of the package must be added to the matlab path. I tried this, and still no luck.
It is not due to using plot as the package name as I get the same error when trying to import analysis.
What I can do is to import using: import plot.* or import analyse.* and then go on to use the functions in the packages, but I want to use the namespaces (i.e. not use .*).
Edit
I'm having this problem on both versions I have installed: 2015b and 2016a.
The answer is that, somewhat counterintuitively, you don't need to call import at all. The docs state that
The parent of the top-level package folder must be on the MATLAB path.
Which is what your addpath(pwd) does and then state that (emphasis is mine):
All references to packages, functions, and classes in the package must
use the package name prefix, unless you import the package.
Meaning at this stage you should be able to call
analyse.testFunc
If you were to import analyse.testFunc you would then be able to call testFunc without prefacing it with the namespace but since you want to retain the namespace the answer is to not call import at all.
I have a whole bunch of custom types that I use throughout my systemverilog code.
Currently I have copies of the typedefs in each file, however it would be great if I could specify the typedef in the header file and just include one header file in each module. This would save me from having to maintain multiple copies of the typedefs and also would clean up my code significantly.
I have tried to do this, by pasting the typedef into the header file, however the tools (Vivado 2014.1) do not like the fact that the typedef is outside of the module and I get syntax errors.
Is there a syntax I can use to specify typedefs that are common to multiple modules?
You can define all your types inside a package and simply import them wherever you want in your code.
For example:
package ComplexPkg;
typedef struct{
shortreal i, r;
} Complex;
endpackage: ComplexPkg
And then:
import ComplexPkg::Complex;
More information about packages you can find in IEEE 1800-2012, p. 738.