[Caml-list] Location in source code

[Caml-list] Location in source code

[Mathieu Gagne]

Hello,

	I would like to be able to define in OCaml analogues of the cpp macros 
__FILE__ and __LINE__, for debugging purposes.  For instance, I would like to 
be able to write

Printf.printf "I had an error in module %s at line %d" __MODULE__ __LINE__

or something similar.  __MODULE__ would expand to the fully qualified module 
name.  I expect something like this might be possible using camlp4, but I 
can't figure out how.  Does anyone have any idea how to achieve this?

Best,

Mathieu Gagne.
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Re: [Caml-list] Location in source code

[Ian Zimmerman]

Mathieu> Hello, I would like to be able to define in OCaml analogues
Mathieu> of the cpp macros __FILE__ and __LINE__, for debugging
Mathieu> purposes.  For instance, I would like to be able to write

Mathieu> Printf.printf "I had an error in module %s at line %d"
Mathieu> __MODULE__ __LINE__

Isn't this what assertions are for?

-- 
Ian Zimmerman, Oakland, California, U.S.A.
GPG: 433BA087  9C0F 194F 203A 63F7 B1B8  6E5A 8CA3 27DB 433B A087
In his own soul a man bears the source
from which he draws all his sorrows and his joys.
Sophocles.
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Re: [Caml-list] Location in source code

[Chris Hecker]

>Mathieu> Printf.printf "I had an error in module %s at line %d"
>Mathieu> __MODULE__ __LINE__
>Isn't this what assertions are for?

Except that assertions don't do this either.  :)  As has been mentioned a bunch of times on the list, assertions in caml only record the file position, and even then they don't seem to handle crlf issues properly on win32.

Anyway, this is a FAQ, search the archive.

Chris

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