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author | John Wiegley <johnw@newartisans.com> | 2008-08-05 13:17:04 -0400 |
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committer | John Wiegley <johnw@newartisans.com> | 2008-08-05 18:05:49 -0400 |
commit | f6f4a46cf5b14f9a2170cd6475958efbf320caec (patch) | |
tree | 05bc1defcdebc201de3dd10477483d906a842821 /src/token.h | |
parent | b7970b29855563e4c67f85af8b31233eda80c22a (diff) | |
download | fork-ledger-f6f4a46cf5b14f9a2170cd6475958efbf320caec.tar.gz fork-ledger-f6f4a46cf5b14f9a2170cd6475958efbf320caec.tar.bz2 fork-ledger-f6f4a46cf5b14f9a2170cd6475958efbf320caec.zip |
Moved around most of the files so that source code is in src/, documentation
is in doc/, etc.
Diffstat (limited to 'src/token.h')
-rw-r--r-- | src/token.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/token.h b/src/token.h new file mode 100644 index 00000000..04ca39c1 --- /dev/null +++ b/src/token.h @@ -0,0 +1,116 @@ +/* + * Copyright (c) 2003-2008, 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, // =~ + 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 |