62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
/* A class for referring to events within a diagnostic_path.
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Copyright (C) 2019-2021 Free Software Foundation, Inc.
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Contributed by David Malcolm <dmalcolm@redhat.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_DIAGNOSTIC_EVENT_ID_H
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#define GCC_DIAGNOSTIC_EVENT_ID_H
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/* A class for referring to events within a diagnostic_path.
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They are stored as 0-based offsets into the events, but
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printed (e.g. via %@) as 1-based numbers.
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For example, a 3-event path has event offsets 0, 1, and 2,
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which would be shown to the user as "(1)", "(2)" and "(3)".
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This has its own header so that pretty-print.c can use this
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to implement "%@" without bringing in all of diagnostic_path
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(which e.g. refers to "tree"). */
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class diagnostic_event_id_t
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{
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public:
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diagnostic_event_id_t () : m_index (UNKNOWN_EVENT_IDX) {}
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diagnostic_event_id_t (int zero_based_idx) : m_index (zero_based_idx) {}
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bool known_p () const { return m_index != UNKNOWN_EVENT_IDX; }
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int one_based () const
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{
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gcc_assert (known_p ());
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return m_index + 1;
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}
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private:
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static const int UNKNOWN_EVENT_IDX = -1;
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int m_index; // zero-based
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};
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/* A pointer to a diagnostic_event_id_t, for use with the "%@" format
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code, which will print a 1-based representation for it, with suitable
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colorization, e.g. "(1)".
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The %@ format code requires that known_p be true for the event ID. */
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typedef diagnostic_event_id_t *diagnostic_event_id_ptr;
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#endif /* ! GCC_DIAGNOSTIC_EVENT_ID_H */
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