Re: [Boost-users] Turning Boost.Multi-Index ordered_non_unique index into ordered_unique one, with custom comparator

Subject: Re: [Boost-users] Turning Boost.Multi-Index ordered_non_unique index into ordered_unique one, with custom comparator
From: Joaquin M LópezMuñoz (joaquin_at_[hidden])
Date: 2016-03-03 08:06:05

Dominique Devienne <ddevienne <at> gmail.com> writes:

> 
> On Thu, Mar 3, 2016 at 10:21 AM, Joaquin M LópezMuñoz <joaquin <at> 
> 
> Suppose we use the following:
> Â  template<typename T,T puncture>
> Â  struct punctured_less
> Â  {
> Â  Â  bool operator()(const T& x,const T& y)const
> Â  Â  {
> Â  Â  Â  Â if(x==puncture&&y==puncture)return true;
> 
> 
> But can we do better? If like in any initial email, you take into account
> that the to-be-indexed int is part of a larger struct with other fields,
> which can be used to "break ties" between elements who's index
> match the "puncture"?
>
> [...]
> 
> struct entry {
> Â  int uid; // real uuid in reality, but enough for our needs here
>   int occurence; // the field to be indexed, uniquely "except fo´Äˆ(øôì()=,°å•Ì°Ý”…¸‘¼Í½µ•Ñ¡¥¹œÝ¥Ñ Ñ¡…и]¡…Ёå½ÔÝ…¹Ð¥ÌÕ¹¥ÅÕ”Í½ÉÑ¥¹œ)‰ä½ÕÉÉ•¹”°•á•ÁЁݡ•¸½ÕÉÉ•¹”ôô´Ä¥¸Ý¡¥ …Í”å½ÔÝ…¹ÐÑ¼(¡Õ¹¥ÅÕ•±ä¤Í½ÉЁ±•á¥½É…Á¡¥…±±ä½¸Õ¥¸Q¡¥Ì€©¥Ì¨¥¹‘••„M]<°Í¼)Ý”…¸‘¼è((€€€ÍÑÉՍЁ•¹ÑÉä(€€€ì(€€€€€¥¹ÐÕ¥ì(€€€€€¥¹Ð½ÕÉÉ•¹”ì€(€€€ôì(€€€€(€€€ÍÑÉՍЁ•¹ÑÉå}½ÕÉÉ•¹•}±•ÍÌ(€€€ì(€€€€€‰½½°½Á•É…Ñ½È ¤¡½¹ÍЁ•¹ÑÉ䘁్½¹ÍЁ•¹ÑÉ䘁䥍½¹ÍÐ(€€€€€ì(€€€€€€€€¥˜¡à¹½ÕÉÉ•¹”ôô´Ä˜™ä¹½ÕÉÉ•¹”ôô´Ä¥É•ÑÕɸà¹Õ¥ñä¹Õ¥ì(€€€€€€€€É•ÑÕɸà¹½ÕÉÉ•¹”ñä¹½ÕÉÉ•¹”ì(€€€€€ô(€€€€€€(€€€€€‰½½°½Á•É…Ñ½È ¤¡½¹ÍЁ•¹ÑÉ䘁౥¹Ðä¥½¹ÍÐ(€€€€€ì(€€€€€€€€¥˜¡à¹½ÕÉÉ•¹”ôô´Ä˜™äôô´Ä¥É•ÑÕɸ™…±Í”ì(€€€€€€€€É•ÑÕɸà¹½ÕÉÉ•¹”ñäì(€€€€€ô(€€€€(€€€€€‰½½°½Á•É…Ñ½È ¤¡¥¹Ðà±½¹ÍЁ•¹ÑÉ䘁䥍½¹ÍÐ(€€€€€ì(€€€€€€€€¥˜¡àôô´Ä˜™ä¹½W'&Væ6SÓÒÓ—&WGW&âfÇ6S°¢&WGW&âƒÇ’æö67W'&Væ6S°¢ТÓ°¢ÙH\ÈYˆÙHÙ\™H\Ú[™Â›Y[X™\[žK[	™[žNŽ›ØØÝ\™[˜ÙOŽ‚‚ˆÝŽ˜ÛÝ]Ë™š[™

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