id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
3519,It should be possible to use consts as external placeholder variables.,ami.ganguli@…,Eric Niebler,"The right-and-side of placeholder let-expressions are not declared as const, so common use-cases like:

   
{{{
placeholder<int> _i;
smatch what;
what.let(_i = 1);
}}}


or:

   
{{{
placeholder<MyClass *> _p;
smatch what;
what.let(_p = this);
}}}


fail to compile.  It would be nice to have some way to specify a placeholder for non-mutable data.  Perhaps:


{{{
placeholder<int const> _i;
}}}

(suggested by Eric Niebler)
",Feature Requests,assigned,To Be Determined,xpressive,Boost 1.40.0,Problem,,,