75 lines
2.8 KiB
C
75 lines
2.8 KiB
C
/* Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License 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 this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef PARSE_LOCATION_INCLUDED
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#define PARSE_LOCATION_INCLUDED
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/**
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Helper class for the YYLTYPE
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*/
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struct Symbol_location
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{
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const char *start; // token start
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const char *end; // the 1st byte after the token
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bool is_empty() const { return length() == 0; }
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size_t length() const { return static_cast<size_t>(end - start); }
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};
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/**
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Bison "location" class
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*/
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typedef struct YYLTYPE
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{
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Symbol_location cpp; // token location in the preprocessed buffer
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Symbol_location raw; // token location in the raw buffer
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bool is_empty() const { return cpp.is_empty(); }
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} YYLTYPE;
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#define YYLTYPE_IS_DECLARED 1 // signal Bison that we have our own YYLTYPE
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/**
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Bison calls this macro:
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1. each time a rule is matched and
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2. to compute a syntax error location.
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@param Current [out] location of the whole matched rule
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@param Rhs locations of all right hand side elements in the rule
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@param N number of right hand side elements in the rule
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*/
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#define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).cpp.start= YYRHSLOC(Rhs, 1).cpp.start; \
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(Current).cpp.end= YYRHSLOC(Rhs, N).cpp.end; \
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(Current).raw.start= YYRHSLOC(Rhs, 1).raw.start; \
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(Current).raw.end= YYRHSLOC(Rhs, N).raw.end; \
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} \
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else \
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{ \
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(Current).cpp.start= \
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(Current).cpp.end= YYRHSLOC(Rhs, 0).cpp.end; \
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(Current).raw.start= \
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(Current).raw.end= YYRHSLOC(Rhs, 0).raw.end; \
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} \
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while (0)
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#endif /* PARSE_LOCATION_INCLUDED */
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