Re: [Boost-users] [Parameter] Positional arg after named arg

From: Richard Crossley (rdc_at_[hidden])
Date: 2006-05-31 11:24:04

Solved. Completely down to operator error.

FWIW. Some brackets had become misplaced.

BOOST_PARAMETER_KEYWORD(tag,a)
BOOST_PARAMETER_KEYWORD(tag,b)

struct parameters : boost::parameter::parameters<    
    boost::parameter::required<tag::a > >,    
    boost::parameter::optional <tag::b >  // ouch!
{};       

Sorry for the noise.

Richard.

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] [mailto:boost-users-
> bounces_at_[hidden]] On Behalf Of Richard Crossley
> Sent: 31 May 2006 11:24
> To: boost-users_at_[hidden]
> Subject: [Boost-users] [Parameter] Positional arg after named arg
> 
> Hi,
> 
> With the parameter library is there any way to stop misuse as in;
> 
> func(/*a = */1,b = 2); Fine, a is positional, b is named.
> 
> func(a = 1,2);
> 
> Happily compiles but probably isn't what was intended, the default
> value is used for the second parameter. Should positional arguments be
> allowed to occur after named arguments?
> 
> Perusing the Parameter library docs I can't see any mention as to what
> should happen here.
> 
> Regards,
> 
> Richard.
> 
> (using VC8.0 & cvs head)
> 
> 
> 
> 
> 
> 
> 
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