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Diffstat (limited to 'parsexp.h')
| -rw-r--r-- | parsexp.h | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/parsexp.h b/parsexp.h deleted file mode 100644 index 900f8d0c..00000000 --- a/parsexp.h +++ /dev/null @@ -1,235 +0,0 @@ -/* - * 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 _PARSEXP_H -#define _PARSEXP_H - -#include "valexpr.h" - -namespace ledger { -namespace expr { - -DECLARE_EXCEPTION(error, parse_error); - -class parser_t : public noncopyable -{ -#define EXPR_PARSE_NORMAL 0x00 -#define EXPR_PARSE_PARTIAL 0x01 -#define EXPR_PARSE_RELAXED 0x02 -#define EXPR_PARSE_NO_MIGRATE 0x04 -#define EXPR_PARSE_NO_REDUCE 0x08 -#define EXPR_PARSE_NO_ASSIGN 0x10 -#define EXPR_PARSE_NO_DATES 0x20 - -public: - typedef uint_least8_t flags_t; - -private: - struct token_t : public noncopyable - { - enum kind_t { - VALUE, // any kind of literal value - - SHORT_ACCOUNT_MASK, - CODE_MASK, - COMMODITY_MASK, - PAYEE_MASK, - NOTE_MASK, - ACCOUNT_MASK, - - IDENT, // [A-Za-z_][-A-Za-z0-9_:]* - DOLLAR, // $ - AT_SYM, // @ - - DOT, // . - DOTDOT, // .. - SLASH, // / - - LPAREN, // ( - RPAREN, // ) - LBRACKET, // [ - RBRACKET, // ] - - EQUAL, // = - NEQUAL, // != - LESS, // < - LESSEQ, // <= - GREATER, // > - GREATEREQ, // >= - - MINUS, // - - PLUS, // + - STAR, // * - KW_DIV, - - EXCLAM, // ! - KW_AND, - KW_OR, - KW_MOD, - - 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, flags_t flags); - void rewind(std::istream& in); - void unexpected(); - - static void unexpected(char c, char wanted = '\0'); - }; - - mutable token_t lookahead; - mutable bool use_lookahead; - - token_t& next_token(std::istream& in, flags_t tflags) const - { - if (use_lookahead) - use_lookahead = false; - else - lookahead.next(in, tflags); - return lookahead; - } - - void push_token(const token_t& tok) const - { - assert(&tok == &lookahead); - use_lookahead = true; - } - - void push_token() const - { - use_lookahead = true; - } - - ptr_op_t parse_value_term(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_unary_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_mul_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_add_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_logic_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_and_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_or_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_querycolon_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - ptr_op_t parse_value_expr(std::istream& in, scope_t& scope, - const flags_t flags) const; - - value_expr parse_expr(std::istream& in, string& str, - scope_t& scope, const flags_t flags) { - try { - ptr_op_t top_node = parse_value_expr(in, scope, flags); - - if (use_lookahead) { - use_lookahead = false; - lookahead.rewind(in); - } - lookahead.clear(); - - return value_expr(top_node, str); - } - catch (error * err) { - err->context.push_back - (new line_context(str, (long)in.tellg() - 1, - "While parsing value expression:")); - throw err; - } - } - -public: - parser_t() : use_lookahead(false) {} - - value_expr parse(std::istream& in, - const flags_t flags = EXPR_PARSE_RELAXED) - { - return parse_expr(in, empty_string, *global_scope, flags); - } - - value_expr parse(std::istream& in, scope_t& scope, - const flags_t flags = EXPR_PARSE_RELAXED) - { - return parse_expr(in, empty_string, scope, flags); - } - - value_expr parse(string& str, const flags_t flags = EXPR_PARSE_RELAXED) - { - std::istringstream stream(str); - return parse_expr(stream, str, *global_scope, flags); - } - - value_expr parse(string& str, scope_t& scope, - const flags_t flags = EXPR_PARSE_RELAXED) - { - std::istringstream stream(str); - return parse_expr(stream, str, scope, flags); - } -}; - -} // namespace expr -} // namespace ledger - -#endif // _PARESXP_H |