How to use functions in the semantic actions?
Juan Dent <[email protected]> Mon, 12 Oct 2020 23:50:54 +0000
| Newsgroups | gmane.comp.parsers.spirit.general |
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amount =3D uint3_p[_val =3D _1]
>> *(','
>> uint3_3_p)[_val *=3D 1000][_val +=3D _1]
>> +('.'
>> uint1_7_p)[_val +=3D _1/10000.0][_val =3D produce_decima=
l_value(_val)]
;
}
template<typename T>
constexpr T produce_decimal_value(T local)
{
if (local =3D=3D 0) // error C2451: conditional expression of t=
ype 'const boost::phoenix::actor<Expr>' is illegal
{}
// need to manipulate the value of _val which I captu=
re here using templates
//
return local;
}
How can I manipulate the value of _val in a member function of the gramma=
r (i.e. produce_decimal_value)?
I need to check when local reaches 0 in order to calculate the digits after=
the decimal point but it won=92t allow me from method of grammar class=85
Please some direction here=85
It=92s funny, I can manipulate the numeric vales or _val and _1 inside the =
constructor of the grammar but not from a user defined method of same gramm=
ar. When I try to use _val as a number it throws errors=85
Regards,
Juan
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=3D550986> for Window=
s 10
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<p class=3D"MsoNormal">amount =3D uint3_p[_val =3D _1]</p>
<p class=3D"MsoNormal"> &nbs=
p; >> *(','</p>
<p class=3D"MsoNormal"> &nbs=
p; >> uint3_3_p)[_val *=3D 1000][=
_val +=3D _1]</p>
<p class=3D"MsoNormal"> &nbs=
p; >> +('.'</p>
<p class=3D"MsoNormal"> &nbs=
p; >> uint1_7_p)[_val +=3D _1/100=
00.0][_val =3D produce_decimal_value(_val)]</p>
<p class=3D"MsoNormal"> &nbs=
p; ;</p>
<p class=3D"MsoNormal">}</p>
<p class=3D"MsoNormal"> &nbs=
p; template<typename T></p>
<p class=3D"MsoNormal"> constexpr T produce_decimal_value=
(T local)</p>
<p class=3D"MsoNormal"> {</p>
<p class=3D"MsoNormal"> if (local=
=3D=3D 0) // error C2451: conditional expression o=
f type 'const boost::phoenix::actor<Expr>' is illegal</p>
<p class=3D"MsoNormal"> {}</p>
<p class=3D"MsoNormal"> &nbs=
p; =
// need to manipulate the value of _val which I capture here using template=
s</p>
<p class=3D"MsoNormal"> &nbs=
p; =
// </p>
<p class=3D"MsoNormal"> retu=
rn local;</p>
<p class=3D"MsoNormal"> }</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">How can I manipulate the value of _<i>va=
l in a member function of the grammar (i.e. produce</i>_decimal_value)?</p>
<p class=3D"MsoNormal">I need to check when local reaches 0 in order to cal=
culate the digits after the decimal point but it won=92t allow me from meth=
od of grammar class=85</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Please some direction here=85 <br>
It=92s funny, I can manipulate the numeric vales or _val and _1 inside the =
constructor of the grammar but not from a user defined method of same gramm=
ar. When I try to use _val as a number it throws errors=85</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Regards,</p>
<p class=3D"MsoNormal">Juan</p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
<p class=3D"MsoNormal">Sent from <a href=3D"https://go.microsoft.com/fwlink=
/?LinkId=3D550986">
Mail</a> for Windows 10</p>
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