Re: Extracting parsed value from a local variable

Hello Michele,

try to use qi::_1 ... qi::_9  where _1 till _9 are placeholders
for your input like double.
The placeholder _1 is the first match, _2 the second, and so on...

Jens


On 10/23/2016 06:59 PM, Michele De Stefano wrote:
> Dear all,
>
> here is my issue. I am creating a rule that happens to parse (amongst 
> several things) a double value into the qi::_a local variable. Now, 
> while staying into the same semantic action, I need to use that parsed 
> double value into another C++ instruction that requires a double value 
> as input.
>
> Think to this instruction as a generic
>
> ouput_type f(double x)
>
> The issue is that when I call (within the semantic action)
>
> f(qi::_a)
>
> the compiler complains that it cannot convert qi::_a into a double.
>
> Is there a way to extract the double value from qi::_a (or anyway from 
> any placeholder)?
>
> Thanks in advance.
>
> Best regards,
> Michele
>
> -- 
> Michele De Stefano
> Linked In <http://it.linkedin.com/in/micheledestefano>
> mds-utils: a general purpose Open Source library 
> <http://sourceforge.net/projects/mds-utils/>
> Personal Web Site <https://sites.google.com/site/micdestefano/>
>
>
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