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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (STDCXX-968) [HP aCC 6.16] Remark #4231 using std::vector<>::assign
Date Wed, 12 Nov 2008 15:47:44 GMT

    [ https://issues.apache.org/jira/browse/STDCXX-968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12646932#action_12646932
] 

Martin Sebor commented on STDCXX-968:
-------------------------------------

The 0 looks fine to me. I had at first thought the 1 was there on purpose, to get around some
compiler's bug, but going back in the changelog (pre-2005) I don't see an explanation for
it. The original code had a 0 there and was changed to 1 without a hint as to why.

{noformat}
#define _RWSTD_DISPATCH(iter) \
        ((_RW::__rw_select<_RW::__rw_is_int< iter >::_C_val>*)0)
{noformat}

> [HP aCC 6.16] Remark #4231 using std::vector<>::assign
> ------------------------------------------------------
>
>                 Key: STDCXX-968
>                 URL: https://issues.apache.org/jira/browse/STDCXX-968
>             Project: C++ Standard Library
>          Issue Type: Improvement
>          Components: 23. Containers
>    Affects Versions: 4.2.1
>            Reporter: Travis Vitek
>            Assignee: Travis Vitek
>            Priority: Trivial
>             Fix For: 4.2.2
>
>   Original Estimate: 1h
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> Note that I have removed +W4231 from the build line by modifying {{$(BUILDDIR)/makefile.in}}
> {noformat}
> [vitek@gofish tests]$ cat t.cpp && gmake t.o
> #include <vector>
> struct S { };
> int main ()
> {
>    S s;
>    std::vector<S> v;
>    v.assign (&s, &s + 1);
>    return 0;  
> }
> aCC -c  -D_RWSTDDEBUG \
>   -I/amd/devco/vitek/stdcxx/4.3.x/include \
>   -I/build/vitek/4.3.0/11S/include \
>   -I/amd/devco/vitek/stdcxx/4.3.x/tests/include  \
>   -AA -g +d +DD64 +w \
>   +W392,655,684,818,819,849 \
>   +W2193,2236,2261,2340,2401,2487 \
>   +W4227,4229,4235,4237,4249 \
>   +W4255,4272,4284,4285,4286,4296,4297 \
>   +W3348   t.cpp
> "/amd/devco/vitek/stdcxx/4.3.x/include/vector", line 194: remark #4231-D: 64
>           bit migration: conversion between types of different sizes has
>           occurred (from "int" to "void *" )
>           _C_assign (__first, __last, _RWSTD_DISPATCH (_InputIter));
>                                       ^
>           detected during instantiation of "void std::vector<_TypeT,
>                     _Allocator>::assign(_InputIter, _InputIter) [with
>                     _TypeT=S, _Allocator=std::allocator<S>, _InputIter=S *]"
>                     at line 10 of "t.cpp"
> {noformat}

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