Sharing constants across languages

I have a long list of constants that I need access to in several projects which are in different languages(Verilog, C, C++ and C#). Rather than repeating them in each language, is there a good way to share these?

The only thing I could think of would be a text file 开发者_C百科and a preprocessing script? Is this the best solution or is there something easier/more elegant?

---

A preprocessing script which automatically updates those constants within your code is probably the best method. Commit the code with your project to ensure correctness and have it a part of the build script.

---

You can keep them in a XML document and write XSLT scripts for each language to generate the appropriate source files in each build.

---

Can you use your makefile (or equivalent) to define these constants? For C and C++. you can use the compiler's CLI options to define pre-processor values for the constants. I haven't done much build customization for Verilog, but I suspect something similar might exist there as well.

---

You can write a simple file in the form of

const1 = value1
const2 = value2
const3 = value3

and then apply something like, for c:

s/\([a-zA-Z][a-zA-Z1-9_]*\)[ \t]*=[ \t]*\(.*\)/#define \1 \2/

Its worth noting that you might need to specify types because not all languages will allow you to use a preprossessor macro that doesn't care about type.

Alternatively, you can make a lexer/parser in Flex/Bison to parse the configuration file. This will be clearer and easier to extend.

---

You might have an XML file with the constants to be shared and have it parsed in each language.

---

For verilog (at least for system verilog) and c++ you can have all constants described as a list (assuming that all of them are of the same type), like the following:

a=0, b= 1, c = 2, ..;

in c++ you would use

const int
#include <myconsts>

in verilog (at least in system verilog) you can use this

parameter int
`include "myconsts"

I guess c# does not have includes. So, you would need a pre-pcocessing script there at least to include your constants in a class. You might be able to use 'cpp' for this. Sorry, do not know much about c#.

Actually, to make all similar i would probably use cpp to generate the file i need:

#ifdef CPP
    const int
#elsif VERILOG
    parameter int
#elsif CSHARP
    class Constants {
       const int
#endif

    a = 0,
    c = 1,
    d = 2;

#ifdef(CSHARP)
    };
#endif