Re: Spirit X3 employee.cpp compile error

On 08/12/2016 08:29 AM, Larry Evans wrote:
> On 08/12/2016 07:53 AM, Vincent Virgilio wrote:
>>
>>
>> On Aug 12, 2016, at 08:27 AM, Larry Evans <[email protected]> wrote:
>>
>>> On 08/12/2016 06:40 AM, Larry Evans wrote:
>>> [snip]
>>>>
>>>>> GitHub: [email protected] <mailto:[email protected]>:boostorg/spirit.git
>>>>>
>>>>> Use the develop branch.
>>>>> --}--cut here--
>>>>>
>>>> The 2 template arg rule code is actually in the x3-devel branch instead
>>>> of the develop branch:
>>>>
>>>> https://github.com/boostorg/spirit/blob/x3-devel/include/boost/spirit/home/x3/nonterminal/rule.hpp#L80
>>>>
>>> [snip]
>>> However, if you decide to use x3-devel, then the employee.cpp code
>>> referenced in your OP needs to be modified so that the arguments
>>> to BOOST_SPIRIT_DEFINE contain assignments instead of just
>>> rule names. For example, see:
>>>
>>> https://github.com/boostorg/spirit/blob/x3-devel/example/x3/calc4.cpp#L218
>>>
>>> HTH.
>>>
>>> -regards,
>>> Larry
>>
>> Hi Larry,
>>
>> Thanks for all the help so far.
>>
>> Why is BOOST_SPIRIT_DEFINE required if the rule declarations and
>> definitions are already associated via assignment? In another small
>> project, I was able to parse with an X3 grammar without that macro. In
>> that case, very schematically, I had "auto const rule_name = rule<...>()
>> = rule_def;"
>>
> [snip]
> Hi Vincent,
>
> I can only guess that the grammar in this small project had no
> recursive rules like the calc4.cpp grammar I mentioned above.
>
> That's only a guess; however, I *think* the whole purpose of
> BOOST_SPIRIT_DEFINE is to allow mutually recursive rules,

Apparently that conclusion is wrong because here:

https://github.com/boostorg/spirit/blob/master/test/x3/rule1.cpp#L48

there's a single recursive rule and there's no BOOST_SPIRIT_DEFINE.

Sorry for misleading you.  I'm still trying to learn how the code
works :(


> such as
> that in calc4.cpp, *and* to avoid massive template names.
> At least that's the conclusion I reach after reading
> [email protected] reply to me here:
>
> https://sourceforge.net/p/spirit/mailman/message/35271675/
>
> HTH.
>
> -regards,
> Larry
>
>
>
>
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