Compiler error for valid boost::spirit::qi grammar

[lars.rohwedder@…]

Due to #8630 I wanted to write a uuid parser using boost::spirit::qi.

It failed with a compiler error. (Tested on g++ 4.8.2 and clang++ 3.5 on Linux amd64)

[lars.rohwedder@…]

Provokes the compiler error if line 32 is enabled

[Joel de Guzman]

It's not a bug. You hit the limits. You can adjust phoenix limits, but I suggest writing a better grammar without semantic actions. It can be done. Go ask the mailing list: ​https://lists.sourceforge.net/lists/listinfo/spirit-general.

I'm closing his one.

[anonymous]

So it is a bug in the documentation because I cannot find this limit. :-/

[Joel de Guzman]

Sorry about that. Yes you are probably right, it is a documentation bug.

And let me correct myself, it's a fusion limit, not a phoenix limit. Just define #define FUSION_MAX_VECTOR_SIZE 20 before anything else, and you are good.

This limit is documented here: http://www.boost.org/doc/libs/1_57_0/libs/fusion/doc/html/fusion/container/vector.html

This should probably be linked to in Spirit. Feel free to issue another ticket, or better yet, submit a doc patch/PR.

[anonymous]

Replying to djowel:

And let me correct myself, it's a fusion limit, not a phoenix limit. Just define #define FUSION_MAX_VECTOR_SIZE 20 before anything else, and you are good.

Okay, thanks for you fast answer. I try to circumvent the limit and hope for a boost version that supports real variadic templates so such limits will vanish. :-)

This limit is documented here: http://www.boost.org/doc/libs/1_57_0/libs/fusion/doc/html/fusion/container/vector.html

I never heard of "fusion" before (except in the compiler error message) so I didn't know of such limits.

This should probably be linked to in Spirit. Feel free to issue another ticket, or better yet, submit a doc patch/PR.

Done: #10752 :-)

Lars R.