Fortran - problem with fweb

Author

problem with fweb

slava.petrov

2006-09-23, 4:00 am

Dear collegues!

I am new in Fortran and literate programming. I try to use fweb and
have problems with this tool. Please tell me, what I do wrong.

There are the files and error messages (file test.web is from the
manual).

================[cat test.web ]==========================
@n/

\Title{example.web}

@* INTRODUCTION

This code is intrnded to illustrate the use of the |write| statement.

@m A_CONSTANT 1.2345

@a
program main
call compute
end

@ The computational routine

@a
subroutine compute
write(*,*) 'Macro value = ', A_CONSTANT
end

@* \INDEX
==================[ ftangle test.web ]======================
This is FTANGLE [UNIX version 1.62 (September 23, 1998)].
(No test.aux file.)
Reading test.web... *1 *3
Writing the output file(s): (test.f)
Done.
[FTANGLE: No errors were found.]
=====================[ cat test.f ]========================
C FTANGLE v1.61,
C created with UNIX on "Friday, September 25, 1998 at 8:02."
C COMMAND LINE: "ftangle test.web"
C RUN TIME: "Saturday, September 23, 2006 at 10:10."
C WEB FILE: "test.web"
C CHANGE FILE: (none)
C* 1: *
*line 12 "test.web"
program main
call compute
end
C* :1 *
C* 2: *
*line 19 "test.web"
subroutine compute
write(*,*)'Macro value = ',1.2345
end
C* :2 *
====================[ g77 test.f ]============================
test.f:8:
C* 1: *
12
Unrecognized statement name at (1) and invalid form for assignment
or statement-function definition at (2)
========================================
==================

WBR, Slava Petrov

Dr Ivan D. Reid

2006-09-23, 8:01 am

On 23 Sep 2006 00:21:25 -0700, slava.petrov <slava.petrov@gmail.com>
wrote in <1158996085.283600.113590@k70g2000cwa.googlegroups.com>:
> Dear collegues!
>
> I am new in Fortran and literate programming. I try to use fweb and
> have problems with this tool. Please tell me, what I do wrong.

> There are the files and error messages (file test.web is from the
> manual).

>=====================[ cat test.f ]========================
> C FTANGLE v1.61,
> C created with UNIX on "Friday, September 25, 1998 at 8:02."
> C COMMAND LINE: "ftangle test.web"
> C RUN TIME: "Saturday, September 23, 2006 at 10:10."
> C WEB FILE: "test.web"
> C CHANGE FILE: (none)
> C* 1: *
^^^^^^^^

>====================[ g77 test.f ]============================
> test.f:8:
> C* 1: *
> 12
> Unrecognized statement name at (1) and invalid form for assignment
> or statement-function definition at (2)
> ========================================
==================

The problem is that what should have been a comment starting in
column 1 has been shifted to column 6 so the compiler is trying to
interpret it as an executable statement. Unfortunately I have zero
experience with fweb, so I have no idea how the comment became malformed.
Possibly check your source for unintended white-space (blanks or tabs)
on an otherwise blank line?

--
Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
KotPT -- "for stupidity above and beyond the call of duty".

George N. White III

2006-09-23, 8:01 am

On Sat, 23 Sep 2006, slava.petrov wrote:

> Dear collegues!
>
> I am new in Fortran and literate programming. I try to use fweb and
> have problems with this tool. Please tell me, what I do wrong.
>
> There are the files and error messages (file test.web is from the
> manual).
> [...]
> ====================[ g77 test.f ]============================
> test.f:8:
> C* 1: *
> 12
> Unrecognized statement name at (1) and invalid form for assignment
> or statement-function definition at (2)
> ========================================
==================

My version has the same bug. There should be a patch floating around
in some usenet or mail archive, but I didn't find it. As a workaround you
can use '-#::' to remove the line number comments or write a small (sed)
script to fix the .f files.

--
George N. White III <aa056@chebucto.ns.ca>

slava.petrov

2006-09-26, 4:01 am

George N. White III wrote:
>
> My version has the same bug. There should be a patch floating around
> in some usenet or mail archive, but I didn't find it. As a workaround you
> can use '-#::' to remove the line number comments or write a small (sed)
> script to fix the .f files.

Thanks George. I'm not alone with my trouble :-) I will try sed to
correct this.

WBR, Slava Petrov.

George N. White III

2006-09-28, 7:00 pm

On Tue, 25 Sep 2006, slava.petrov wrote:

> Thanks George. I'm not alone with my trouble :-) I will try sed to
> correct this.

It doesn't trouble me, as I use f90 free-format for new code, and don't
need line numbers for working code. After responding to your post I found
the following in the READ_ME-1.6x file on the ftp site:

* In Fortran codes, ftangle incorrectly indents the first module comment.

Temporary fix: Use either of `-Tv' or `-#'.

--
George N. White III <aa056@chebucto.ns.ca>

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