1 files changed, 80 insertions, 0 deletions
diff --git a/src/libixion/formula_parser.hpp b/src/libixion/formula_parser.hpp
new file mode 100644
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+++ b/src/libixion/formula_parser.hpp
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_IXION_FORMULA_PARSER_HPP
+#define INCLUDED_IXION_FORMULA_PARSER_HPP
+
+#include "ixion/exceptions.hpp"
+#include "ixion/formula_tokens.hpp"
+
+#include "lexer_tokens.hpp"
+
+#include <string>
+
+namespace ixion {
+
+class formula_name_resolver;
+class model_context;
+
+/**
+ * Class formula_parser parses a series of primitive (or lexer) tokens
+ * passed on from the lexer, and turn them into a series of formula tokens.
+ * It also picks up a list of cells that it depends on.
+ */
+class formula_parser
+{
+    formula_parser() = delete;
+    formula_parser(const formula_parser&) = delete;
+    formula_parser& operator=(const formula_parser&) = delete;
+
+public:
+    class parse_error : public general_error
+    {
+    public:
+        parse_error(const ::std::string& msg);
+    };
+
+    formula_parser(const lexer_tokens_t& tokens, model_context& cxt, const formula_name_resolver& resolver);
+    ~formula_parser();
+
+    void set_origin(const abs_address_t& pos);
+    void parse();
+
+    formula_tokens_t& get_tokens();
+
+private:
+
+    void primitive();
+    void name();
+    void literal();
+    void value();
+    void less();
+    void greater();
+
+    const lexer_token& get_token() const;
+    bool has_token() const;
+    bool has_next() const;
+    void next();
+    void prev();
+
+private:
+    lexer_tokens_t::const_iterator m_itr_cur;
+    lexer_tokens_t::const_iterator m_itr_end;
+
+    const lexer_tokens_t&   m_tokens; // lexer tokens of this expression
+    model_context&   m_context;
+    formula_tokens_t        m_formula_tokens;
+    abs_address_t           m_pos;    // reference position (usually current cell). always absolute.
+
+    const formula_name_resolver& m_resolver;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */