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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
|---|---|---|---|---|---|---|---|---|---|
| 0000060 | Frama-C | Kernel | public | 2009-04-23 20:04 | 2014-02-12 16:56 | ||||
| Reporter | gmelquio | ||||||||
| Assigned To | virgile | ||||||||
| Priority | normal | Severity | major | Reproducibility | always | ||||
| Status | closed | Resolution | fixed | ||||||
| Product Version | Frama-C GIT, precise the release id | ||||||||
| Target Version | Fixed in Version | Frama-C Beryllium-20090601-beta1 | |||||||
| Summary | 0000060: Conversion from integer to real | ||||||||
| Description | While the documentation says that "there are implicit coercions for numeric types: integer is itself a subtype of type real" and that cast are allowed in logic expressions, neither seem to work. /*@ ensures 1.0 == 1; */ void f(); /*@ ensures 1.0 == (real)1; */ void g(); When running "frama-c test.c" (revision 5096), I get File test.c, line 1, characters 19-20: Error during analysis of annotation: invalid cast between real and integer. Use conversion functions instead test.c:1: Warning: Ignoring specification of function f File test.c, line 4, characters 19-26: Error during analysis of annotation: cannot cast to logic type test.c:4: Warning: Ignoring specification of function g The error message talks about some "conversion functions", but there are no such things in the documentation. The Jessie plugin seems to know about a \real_of_int function, but the CIL front end does not. So how does one convert an integer to a real, if neither implicit nor explicit casts work? | ||||||||
| Tags | No tags attached. | ||||||||
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virgile (developer) 2009-04-24 10:36 |
Casts are only allowed to C types, not to logic types (e.g, /*@ lemma foo: 1.0 == (float)1; */ will work). The conversion from integer to real should indeed be implicit, though. |
| Notes |
| Issue History |
|||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2009-04-23 20:04 | gmelquio | New Issue | |
| 2009-04-24 10:30 | virgile | Status | new => assigned |
| 2009-04-24 10:30 | virgile | Assigned To | => virgile |
| 2009-04-24 10:36 | virgile | Note Added: 0000024 | |
| 2009-04-24 16:16 | virgile | Relationship added | related to 0000062 |
| 2009-04-27 18:43 | svn | ||
| 2009-04-27 18:43 | svn | Status | assigned => resolved |
| 2009-04-27 18:43 | svn | Resolution | open => fixed |
| 2009-06-23 18:02 | signoles | Status | resolved => closed |
| 2009-06-23 18:03 | signoles | Fixed in Version | => Frama-C Beryllium beta-1 |
| 2013-12-19 01:13 | Source_changeset_attached | => framac master 96132949 | |
| 2014-02-12 16:56 | Source_changeset_attached | => framac stable/neon 96132949 | |
| Issue History |