The OPAL Discussion Forum

["Snuverink Jochem (PSI)" <jochem.snuverink AT psi.ch>]

Dear Simon,

In version 2.4 the SHOW command was removed. I see that the documentation on the MACRO command still shows an example using it. Sorry, for that, we'll update it. Secondly, there is a semicolon missing after your SHOWIT(PI).

The following should do what you want:

REAL X = 2;

// print value

VALUE,VALUE={X,X*2};

// print macro

SHOWIT(X): MACRO {

   VALUE,VALUE={X};

}

SHOWIT(X);

SHOWIT(PI);

// calculate

KS(X): MACRO {

   X = 3e-3*X+0.5e-3;

}

// assign X

KS(X);

// print X

SHOWIT(X);

Output:

OPAL> value: {X,X*2} = {2, 4}

OPAL> 

OPAL> 

OPAL> value: {X} = {2}

OPAL> 

OPAL> 

OPAL> value: {PI} = {3.14159}

OPAL> 

OPAL> 

OPAL> value: {X} = {0.0065}

Hope that helps,

Jochem

---

From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> on behalf of Dr. Simon Friederich <s.friederich AT uni-mainz.de>
Sent: Friday, February 19, 2021 3:35 PM
To: opal AT lists.psi.ch
Subject: [Opal] MACRO execution fails

 

Dear OPAL-Team,

I wanted to play with the MACRO command, but unfortunately it leads to a "Segmentation fault":

Example from: http://amas.web.psi.ch/opal/Documentation/master/OPAL_Manual.html#sec.control.macro

test.in:

SHOWIT(X): MACRO {
   SHOW, NAME = X;
}
SHOWIT(PI)

Terminal output:

OPAL> This is OPAL (Object Oriented Parallel Accelerator Library) Version 2.4.0
OPAL>             git rev. ffded40c6dd317d29776f58f33080e2919319d89
...
OPAL> Finished reading startup file.
OPAL> * Reading input stream "test.in".
[desktop-04:394206] *** Process received signal ***
[desktop-04:394206] Signal: Segmentation fault (11)
[desktop-04:394206] Signal code: Address not mapped (1)
[desktop-04:394206] Failing at address: 0x34
[desktop-04:394206] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7f06780253c0]
[desktop-04:394206] [ 1] opal(_ZlsRSoRK5Token+0x19)[0x55612ef3aed9]
[desktop-04:394206] [ 2] opal(_ZNK9Statement10printWhereER6Informb+0xbe)[0x55612ef38a6e]
[desktop-04:394206] [ 3] opal(_ZNK10OpalParser13readStatementEP11TokenStream+0x513)[0x55612ef60c13]
[desktop-04:394206] [ 4] opal(_ZNK10OpalParser3runEv+0x79)[0x55612ef5b519]
[desktop-04:394206] [ 5] opal(_ZNK10OpalParser3runEP11TokenStream+0x7d)[0x55612ef6064d]
[desktop-04:394206] [ 6] opal(main+0x20b9)[0x55612eea1f69]
[desktop-04:394206] [ 7] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f06770fc0b3]
[desktop-04:394206] [ 8] opal(_start+0x2a)[0x55612eeac03a]
[desktop-04:394206] *** End of error message ***
Segmentation fault (core dumped)

I guess this is the result of a compilation error for my OPAL version, right?

If I want to use functions in OPAL, is there another possibility than using MACROS? (E.g. def KS(x): return KS = 3e-3*x+0.5e-3?)

Best regards
Simon

-- 
Dr. Simon Friederich
Helmholtz-Institut Mainz | Insitut für Kernphysik
Kollaboration ACID       | B
Johannes Gutenberg-Universität Mainz
Staudingerweg 18         | Johann-Joachim-Becherweg 45
55128 Mainz, Deutschland

Tel.: +49 (0)6131 39-23160
E-Mail: s.friederich AT uni-mainz.de