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/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _TOKEN_H
#define _TOKEN_H
#include "expr.h"
namespace ledger {
struct expr_t::token_t : public noncopyable
{
enum kind_t {
VALUE, // any kind of literal value
IDENT, // [A-Za-z_][-A-Za-z0-9_:]*
MASK, // /regexp/
LPAREN, // (
RPAREN, // )
EQUAL, // ==
NEQUAL, // !=
LESS, // <
LESSEQ, // <=
GREATER, // >
GREATEREQ, // >=
ASSIGN, // =
MATCH, // =~
NMATCH, // !~
MINUS, // -
PLUS, // +
STAR, // *
KW_DIV, // /
EXCLAM, // !
KW_AND, // &
KW_OR, // |
KW_MOD, // %
QUERY, // ?
COLON, // :
COMMA, // ,
TOK_EOF,
UNKNOWN
} kind;
char symbol[3];
value_t value;
std::size_t length;
explicit token_t() : kind(UNKNOWN), length(0) {
TRACE_CTOR(token_t, "");
}
~token_t() throw() {
TRACE_DTOR(token_t);
}
token_t& operator=(const token_t& other) {
if (&other == this)
return *this;
assert(false);
return *this;
}
void clear() {
kind = UNKNOWN;
length = 0;
value = NULL_VALUE;
symbol[0] = '\0';
symbol[1] = '\0';
symbol[2] = '\0';
}
void parse_ident(std::istream& in);
void next(std::istream& in, const uint_least8_t flags);
void rewind(std::istream& in);
void unexpected();
static void expected(char wanted, char c = '\0');
};
} // namespace ledger
#endif // _TOKEN_H
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