Re: [Haskell-cafe] Help me TH code.

Serguey Zefirov writes:

2010/10/27 Andy Stewart :

...

Hi all,

I want use TH write some function like below:

 data DataType = StringT                | IntT                | CharT

 parse :: [(String,DataType)] -> (TypeA, TypeB, ... TypeN)

Example:

 parse [("string", StringT), ("001", IntT), ("c", CharT)]

will return:

 ("string", 001, 'c')

So how to use TH write 'parse' function?

I think that you should use TH properly, without compiler and logical errors.

What actually do you want? I'm build multi-processes communication program.

Example i have two processes : Client and Server. At Client side, i pass [DataType] to Server, example: [StringT, IntT, CharT] Server will handle "user input" with [DataType] and return result [String] to Client side, example: ["string", "001", "c"] Then at Client side, i need parse [String] to get real value: ("string", 001, 'c') Because, [DataType] have many different case, so i want pass [String] between processes, and use TH parse result [String] at Client side. Thanks, -- Andy