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digitalmars.D.bugs - [Issue 11041] New: Some function in core.stdc should be CTFEable

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11041

           Summary: Some function in core.stdc should be CTFEable
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: druntime
        AssignedTo: nobody puremagic.com
        ReportedBy: ttanjo gmail.com



It prevents some functions in Phobos from being CTFEable.
For instance, core.stdc.string.memcpy prevents std.algorithm.move from being
CTFEable (I think it should be).

A workaround for it is that we implement functions in druntime in D by
ourselves in each module
but it is better to provide their CTFEable implementations in druntime.

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Sep 14 2013
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11041


bearophile_hugs eml.cc changed:

           What    |Removed                     |Added
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                 CC|                            |bearophile_hugs eml.cc





 It prevents some functions in Phobos from being CTFEable.
 For instance, core.stdc.string.memcpy prevents std.algorithm.move from being
 CTFEable (I think it should be).
 
 A workaround for it is that we implement functions in druntime in D by
 ourselves in each module
 but it is better to provide their CTFEable implementations in druntime.


One possible solution is to never use core.stdc.string.memcpy directly in
Phobos, and define a D wrapper that contains __ctfe and calls
core.stdc.string.memcpy if that's false.

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Sep 15 2013
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=11041




The initial bug report is too vague. We need a list of functions.

Is it just memcpy() and memmove() ? Or are there others?

We also need to consider if the use of those functions in making those
algorithms un safe.

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Sep 17 2013