/usr/include/pegtl/internal/must.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 43 44 45 46 47 48 49 | // 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_MUST_HH
#define PEGTL_INTERNAL_MUST_HH
#include "seq.hh"
#include "raise.hh"
#include "skip_control.hh"
namespace pegtl
{
namespace internal
{
// The general case simply applies must<> to each member of the
// 'Rules' parameter pack individually, below is the specialization
// which implements the case for a single rule.
template< typename ... Rules >
struct must
: seq< must< Rules > ... > {};
// While in theory the implementation for a single rule could
// be simplified to must< Rule > = sor< Rule, raise< Rule > >, this
// would result in some unnecessary run-time overhead.
template< typename Rule >
struct must< Rule >
{
using analyze_t = typename Rule::analyze_t;
template< apply_mode A, template< typename ... > class Action, template< typename ... > class Control, typename Input, typename ... States >
static bool match( Input & in, States && ... st )
{
if ( ! Control< Rule >::template match< A, Action, Control >( in, st ... ) ) {
raise< Rule >::template match< A, Action, Control >( in, st ... );
}
return true;
}
};
template< typename ... Rules >
struct skip_control< must< Rules ... > > : std::true_type {};
} // internal
} // pegtl
#endif
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