65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2003 Vaclav Vesely
|
|
http://spirit.sourceforge.net/
|
|
|
|
Use, modification and distribution is subject to the Boost Software
|
|
License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
|
http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#include <boost/assert.hpp>
|
|
#include <iostream>
|
|
#include <boost/cstdlib.hpp>
|
|
#include <boost/spirit/include/classic_core.hpp>
|
|
#include <boost/spirit/include/classic_distinct.hpp>
|
|
|
|
using namespace std;
|
|
using namespace boost;
|
|
using namespace BOOST_SPIRIT_CLASSIC_NS;
|
|
|
|
struct my_grammar: public grammar<my_grammar>
|
|
{
|
|
template <typename ScannerT>
|
|
struct definition
|
|
{
|
|
typedef rule<ScannerT> rule_t;
|
|
|
|
// keyword_p for ASN.1
|
|
dynamic_distinct_parser<ScannerT> keyword_p;
|
|
|
|
definition(my_grammar const& self)
|
|
: keyword_p(alnum_p | ('-' >> ~ch_p('-'))) // ASN.1 has quite complex naming rules
|
|
{
|
|
top
|
|
=
|
|
keyword_p("asn-declare") // use keyword_p instead of std_p
|
|
>> !str_p("--")
|
|
>> keyword_p("ident")
|
|
;
|
|
}
|
|
|
|
rule_t top;
|
|
|
|
rule_t const& start() const
|
|
{
|
|
return top;
|
|
}
|
|
};
|
|
};
|
|
|
|
int main()
|
|
{
|
|
my_grammar gram;
|
|
parse_info<> info;
|
|
|
|
info = parse("asn-declare ident", gram, space_p);
|
|
BOOST_ASSERT(info.full); // valid input
|
|
|
|
info = parse("asn-declare--ident", gram, space_p);
|
|
BOOST_ASSERT(info.full); // valid input
|
|
|
|
info = parse("asn-declare-ident", gram, space_p);
|
|
BOOST_ASSERT(!info.hit); // invalid input
|
|
|
|
return exit_success;
|
|
}
|