Unicode minus sign (U+2212) not accepted by Jessie, yet used in documentation, causing mysterious failure
ID0000366: This issue was created automatically from Mantis Issue 366. Further discussion may take place here.
| Id | Project | Category | View | Due Date | Updated |
|---|---|---|---|---|---|
| ID0000366 | Frama-C | Plug-in > jessie | public | 2010-01-04 | 2014-02-12 |
| Reporter | dwheeler | Assigned To | monate | Resolution | fixed |
| Priority | normal | Severity | minor | Reproducibility | always |
| Platform | - | OS | - | OS Version | - |
| Product Version | Frama-C Beryllium-20090902 | Target Version | - | Fixed in Version | Frama-C Boron-20100401 |
Description :
The Jessie tutorial: http://frama-c.cea.fr/jessie_tutorial_index.html includes many examples, but cutting and pasting from them produces mysterious, hard-to-understand failures.
The problem is that the HTML (and probably PDF) uses Unicode U+2212 ("Minus sign") as the subtraction operator; You can see this by searching for "−" in the HTML. Frama-C/Jessie does not accept this; they expect U+002D ("hyphen-minus") instead.
I recommend that Frama-C/Jessie be changed so that U+2122 is permitted as an alternative to "-", just as many other Unicode characters are already accepted.
In addition, the documentation should perhaps be changed to use "-" so that it will work with older systems that do not cut-and-paste this character correctly. On my system, the difference is a pixel or two, and is thus difference is rather hard to detect.