9a9e06554e
What this means is that the utility code, basic math, value expressions, string formatting and option handling are now entirely decoupled from the rest of the code. This decoupling not only greatly simplifies the more basic parts of Ledger, but makes it much easier to test and verify its completeness. For example, when the formatting code %X is seen by the format parser, it turns into a call to the expression function fmt_X, which must be defined when the format string is first compiled against an object. If that object is a transaction, the transaction's scope will be the first to have a chance at providing a definition. If an account is being reported, it will. If neither does, the next scope in sequence -- soon to be the current report -- will, and then the session object that "owns" the current Ledger session. In 2.6, the formatting code new everything about transaction and accounts, and relied on flags to communicate special details between them. Now the transaction will offer the details for its own reporting, while the formatter worries only about strings and how to output them.
123 lines
3.2 KiB
C++
123 lines
3.2 KiB
C++
/*
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* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TOKEN_H
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#define _TOKEN_H
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#include "expr.h"
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namespace ledger {
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struct expr_t::token_t : public noncopyable, public supports_flags<>
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{
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#define TOKEN_SHORT_ACCOUNT_MASK 0x01
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#define TOKEN_CODE_MASK 0x02
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#define TOKEN_COMMODITY_MASK 0x04
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#define TOKEN_PAYEE_MASK 0x08
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#define TOKEN_NOTE_MASK 0x10
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#define TOKEN_ACCOUNT_MASK 0x20
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enum kind_t {
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VALUE, // any kind of literal value
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IDENT, // [A-Za-z_][-A-Za-z0-9_:]*
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MASK, // /regexp/
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LPAREN, // (
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RPAREN, // )
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EQUAL, // ==
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NEQUAL, // !=
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LESS, // <
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LESSEQ, // <=
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GREATER, // >
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GREATEREQ, // >=
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ASSIGN, // =
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MATCH, // =~
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MINUS, // -
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PLUS, // +
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STAR, // *
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KW_DIV, // /
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EXCLAM, // !
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KW_AND, // &
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KW_OR, // |
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KW_MOD, // %
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QUERY, // ?
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COLON, // :
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COMMA, // ,
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TOK_EOF,
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UNKNOWN
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} kind;
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char symbol[3];
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value_t value;
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std::size_t length;
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explicit token_t() : supports_flags<>(), kind(UNKNOWN), length(0) {
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TRACE_CTOR(token_t, "");
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}
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~token_t() throw() {
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TRACE_DTOR(token_t);
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}
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token_t& operator=(const token_t& other) {
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if (&other == this)
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return *this;
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assert(false);
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return *this;
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}
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void clear() {
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kind = UNKNOWN;
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length = 0;
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value = NULL_VALUE;
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symbol[0] = '\0';
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symbol[1] = '\0';
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symbol[2] = '\0';
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}
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void parse_ident(std::istream& in);
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void next(std::istream& in, unsigned int flags);
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void rewind(std::istream& in);
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void unexpected();
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static void expected(char wanted, char c = '\0');
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};
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} // namespace ledger
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#endif // _TOKEN_H
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