Re: [Boost-users] Compiler errors when using Boost::Spirit

Subject: Re: [Boost-users] Compiler errors when using Boost::Spirit
From: Evan Driscoll (driscoll_at_[hidden])
Date: 2012-08-07 15:37:05

Just FYI, I found the answer to the biggest problem in the FAQ.

Evan

On 08/07/2012 10:47 AM, Evan Driscoll wrote:
> Hey all,
>
> I'm new to Spirit and trying to put a parser together for a very simple
> language of S expressions. [Note: while I'm new to Spirit, I'm not new
> to parsers or parser combinators.]
>
> This is sort of an obnoxious email because it's basically "here, solve
> my problem for me even though I haven't read the docs as well as I
> could", but I figured I'd ask anyway; so if you take a look, I'm much
> appreciative.
>
>
> I define some tokens
> template <typename Lexer>
> struct tokens : lex::lexer<Lexer> {
> tokens() {
> this->self.add
> ("(", Tokens::L_Paren)
> (")", Tokens::R_Paren)
> ("\"...\"", Tokens::String_Literal)
> ("[0-9]+", Tokens::Integer_Literal)
> ("[a-zA-Z]+", Tokens::Symbol)
> ;
> }
> };
>
>
> Then a grammar:
> template <typename Iterator>
> struct sexp_grammar
> : qi::grammar<Iterator, SExp::Ptr(), space_type>
> {
> qi::rule<Iterator, SExp::Ptr(), space_type> sexp;
> qi::rule<Iterator, vector<SExp::Ptr>(), space_type> sexp_list;
>
> sexp_grammar()
> : sexp_grammar::base_type(sexp)
> {
> using qi::token;
> using namespace Tokens;
>
> sexp_list = *sexp;
>
> sexp = token(String_Literal)
> | token(Integer_Literal)
> | token(Symbol)
> | (token(L_Paren)
>  >> sexp_list
>  >> token(R_Paren)
> );
> }
> };
>
> (SExp is a class, and SExp::Ptr is a typedef to shared_ptr<SExp>.)
>
> If I change the also tried removing the template parameters other than
> Iterator in the rules, and that let it compile (albeit with a warning).
>
>
> I get oodles of errors (compiling with GCC 4.6 with
> g++ -o src/parser.os -c -std=c++0x -g -Wall -Wextra
> -Wnon-virtual-dtor -fPIC -Iinclude src/parser.cc)
> which I'm not even going to try to paste into this email and you can
> look at pastebin instead:
> http://pastebin.com/R5Hk9gJ0
>
>
> The full code can be seen at
> https://github.com/EvanED/simple_sexp/blob/master/src/parser.cc
>
> Evan