Re: [boost] [string_ref] string literal constructor

Subject: Re: [boost] [string_ref] string literal constructor
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-11-01 20:00:31

AMDG

On 11/01/2013 04:42 PM, Michael Marcin wrote:
> I noticed string_ref doesn't have a constructor for a string literal.
> Wouldn't this save a call to strlen for a common case?
> 
> Ex.
> 
> template< std::size_t N >
> basic_string_ref( const charT( &str )[N] )
>     : basic_string_ref( str, N-1 )
> {
>     static_assert(N >= 1, "not a string literal");
> }
> 
> string_ref test( "test" );
> 
> I see that adding this directly doesn't work as the compiler is always
> choosing to decay and pick the const char* overload.
> 
> Is there no way to make this work?
> 

The behavior is not guaranteed to be the same, anyway.
Not all char arrays are string literals.

In Christ,
Steven Watanabe