Watching module variables with equivalence

[Fernando Molina]

Dears,

I found that cannot watch variables inside a module when they are included in anequivalence statement

Please look at the attached project. In its present state I can set a breakpoint in the main program and watch the variables k and X0. However, if the line containing the equivalence statement is uncommented, both k and X0 show "Not available in current context!" in the watch window

Using latest CB 20.03 (Build mar 14 2020) on windows 10 x64, with gcc 9.10

Regards

[Darius Markauskas]

Dear Fernando,

I can confirm this problem. I tested your example on Ubuntu 18.04 (gfortran 7.5, gdb 8.1).

The debugger plugin of C::B just starts GDB debugger. All actual debugging is performed in GDB. And this problem is on GDB or Gfortran side. Not C::B. So, I can't fix it :( .

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[Fernando Molina]

OK, Thanks Darius.

I will try to file a bug in gcc site.

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[Darius Markauskas]

According to the Fortran 2018 standard, Equivalence statement is an obsolescent feature (B.3.11). If you are developing a new code, you should not use this statement.

To view this discussion on the web visit https://groups.google.com/d/msgid/cbfortran/CABiPA2ZFsQgoc45W_n-rrPM18uyaOHEWO3fBRU3oUh2qhnCScA%40mail.gmail.com.

[Fernando Molina]

Wow. Didn't know. This is a code I have developed several years ago, in Fortran 2003 days. Anyway, what to use instead? I use for fitting a Levenberg-Marquardt implementation which requires the fitting parmeters to be in a 1-dimensional array X, so I use equivalence to map these to more useful names such as chi, rho, density, etc.

Thanks for your help

Fernando

El lunes, 11 de mayo de 2020, 6:27:34 (UTC-3), darmar escribió:

According to the Fortran 2018 standard, Equivalence statement is an obsolescent feature (B.3.11). If you are developing a new code, you should not use this statement.

On Sun, 10 May 2020 at 04:05, Fernando Molina <fmol...@gmail.com> wrote:

OK, Thanks Darius.

I will try to file a bug in gcc site.

El sáb., 9 de may. de 2020 a la(s) 14:40, Darius Markauskas (darm...@gmail.com) escribió:

Dear Fernando,

I can confirm this problem. I tested your example on Ubuntu 18.04 (gfortran 7.5, gdb 8.1).

The debugger plugin of C::B just starts GDB debugger. All actual debugging is performed in GDB. And this problem is on GDB or Gfortran side. Not C::B. So, I can't fix it :( .

On Wed, 6 May 2020 at 18:26, Fernando Molina <fmol...@gmail.com> wrote:

Dears,

I found that cannot watch variables inside a module when they are included in anequivalence statement

Please look at the attached project. In its present state I can set a breakpoint in the main program and watch the variables k and X0. However, if the line containing the equivalence statement is uncommented, both k and X0 show "Not available in current context!" in the watch window

Using latest CB 20.03 (Build mar 14 2020) on windows 10 x64, with gcc 9.10

Regards

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[Darius Markauskas]

I do not know your code, but maybe Associate construct is for you:

http://fortranwiki.org/fortran/show/associate

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