[Boost-users] Re: Tweaking the Skip Parser, was RE: Spirit 1.6 with VC6

...

No chance of switching to 7.1? :-)

Things are looking up. We just did a project-wide upgrade to... VC7.1. Problem solved. I'm now merrily writing rules for my JavaScript parser. It doesn't have to support the whole language (not for a while, maybe never), I just need to be able to parse out the names and locations of all the functions in a file. It's for a JavaScript editor built into one of our

Take a look at: http://www.boost.org/libs/spirit/doc/faq.html#scanner_business You don't want the skip parser to be a phrase level scanner. parse(str, rules, space_p | comment_p( "/*", "*/" ) | comment_p( "//" ) ) may work for you? Jeff F "Mark Storer" wrote in message news:076D1E704127414E9FEAFFC31F66C9472739CD@vrsdex1.verity.com... products, and later we'll be adding auto-completion. That'll require a more thorough parser, but for now, I'm just after funciton locations.

So far so good... though I'll undoubtedly be quite familiar with the

BOOST_SPIRIT_DEBUG* macros before I'm done.

I've got another Spirit question: I've been adding "*comment" throughout

the rules and it's getting tiresome:

rule blockComment = comment_p( "/*", "*/" ); rule lineComment = comment_p( "//" ); rule comment = blockComment | lineComment;

Spraying the "comment" rule liberally through my rules is an option...

rule codeBlock = ch_p('{') >> *(comment | codeBlock

| ~ch_p('}')) >> ch_p('}');

... but not an appealing one. This becomes particularly true once I start

working on the auto-completion parser.

It just occured to me that if the skip parser ate comments for me, it

would greatly simplify my rules. I'd like to tweak the skip parser so it skips over my "comment" rule as well as white space. I just took a stab at this, but didn't get very far. I tried:

parse(str, rules, space_p | comment)

but that resulted in a compiler error. 7.1's errors are MUCH easier to

read that 6's. I'm going to like this new compiler.

C:\SDKs\boost_1_31_0\boost\spirit\core\non_terminal\impl\rule.ipp(190):

error C2664: 'boost::spirit::impl::abstract_parser::do_parse_virtual' : cannot convert parameter 1 from 'const scanner_t' to 'const boost::spirit::rule<T0>::scanner_t &'

with [

ScannerT=boost::spirit::ruleboost::spirit::phrase_scanner_t::scanner_t,

AttrT=boost::spirit::ruleboost::spirit::phrase_scanner_t::attr_t

] and [ T0=boost::spirit::phrase_scanner_t ]

Pointing me to the relevant section of the docs is an acceptable answer,

though I wouldn't mind a little more info than that. ;)

I'll keep plugging away. If I come up with an answer, I'll post it to the

list. I'd expect this to be useful to other beginners at the very least.

--Mark Storer Senior Software Engineer Verity, Inc.