/usr/include/pegtl/internal/opt.hh is in pegtl-dev 1.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | // Copyright (c) 2014-2015 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/ColinH/PEGTL/
#ifndef PEGTL_INTERNAL_OPT_HH
#define PEGTL_INTERNAL_OPT_HH
#include "skip_control.hh"
#include "seq.hh"
#include "trivial.hh"
#include "../analysis/generic.hh"
namespace pegtl
{
namespace internal
{
template< typename ... Rules > struct opt;
template< typename ... Rules >
struct skip_control< opt< Rules ... > > : std::true_type {};
template<>
struct opt<>
: trivial< true > {};
template< typename ... Rules >
struct opt
{
using analyze_t = analysis::generic< analysis::rule_type::OPT, Rules ... >;
template< apply_mode A, template< typename ... > class Action, template< typename ... > class Control, typename Input, typename ... States >
static bool match( Input & in, States && ... st )
{
return in.empty() || rule_match_three< seq< Rules ... >, A, Action, Control >::match( in, st ... ) || true;
}
};
} // internal
} // pegtl
#endif
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