digitalmars.D.bugs - [Issue 5023] New: Docs about order of execution of invariant and pre/post conditions
- d-bugmail puremagic.com (32/38) Oct 09 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5023
- d-bugmail puremagic.com (6/6) Oct 09 2010 http://d.puremagic.com/issues/show_bug.cgi?id=5023
- d-bugmail puremagic.com (11/11) Jan 19 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5023
- d-bugmail puremagic.com (9/9) Jan 19 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5023
- d-bugmail puremagic.com (6/6) Jan 19 2012 http://d.puremagic.com/issues/show_bug.cgi?id=5023
http://d.puremagic.com/issues/show_bug.cgi?id=5023 Summary: Docs about order of execution of invariant and pre/post conditions Product: D Version: D2 Platform: All OS/Version: All Status: NEW Keywords: spec Severity: normal Priority: P2 Component: websites AssignedTo: nobody puremagic.com ReportedBy: bearophile_hugs eml.cc This D2 docs page states: http://www.digitalmars.com/d/2.0/class.html#invariantsThe invariant is checked when a class constructor completes, at the start of the class destructor, before a public or exported member is run, and after a public or exported function finishes.If preconditions, postconditions and invariants are pure functions then they need to refuse the usage of functions like printf() inside them. If they aren't pure (maybe because they must support printing and logging), then printing and logging is a side effect, and their order of execution counts. Even if preconditions, postconditions and invariants are pure functions, their purpose is to stop the execution of the program when there's a bug, so during debugging it's important to know the order of execuction of those contracts, to understand where the bug is. Either way, the order of execution of preconditions, postconditions and invariants is important and it needs to be stated in the D documentation (and it needs to be the same in different D implementations). So I suggest to change the D docs like this:The invariant is checked when a class constructor completes, at the start of the class destructor, before a public or exported member is run (before its precondition), and after a public or exported function finishes (after its postcondition).-- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 09 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5023 See bug 5024 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Oct 09 2010
http://d.puremagic.com/issues/show_bug.cgi?id=5023 Walter Bright <bugzilla digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |bugzilla digitalmars.com 13:57:27 PST --- Fixed, but the order is preconditions, invariant, body, invariant, postconditions. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 19 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5023 Walter Bright <bugzilla digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 19 2012
http://d.puremagic.com/issues/show_bug.cgi?id=5023 13:58:09 PST --- *** Issue 5024 has been marked as a duplicate of this issue. *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 19 2012