From f6f4a46cf5b14f9a2170cd6475958efbf320caec Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Tue, 5 Aug 2008 13:17:04 -0400
Subject: Moved around most of the files so that source code is in src/,
 documentation is in doc/, etc.

---
 src/parser.h | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/parser.h

(limited to 'src/parser.h')

diff --git a/src/parser.h b/src/parser.h
new file mode 100644
index 00000000..294d28ff
--- /dev/null
+++ b/src/parser.h
@@ -0,0 +1,103 @@
+/*
+ * 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 _PARSER_H
+#define _PARSER_H
+
+#include "token.h"
+#include "op.h"
+
+namespace ledger {
+
+class expr_t::parser_t : public noncopyable
+{
+#define EXPR_PARSE_NORMAL     0x00
+#define EXPR_PARSE_PARTIAL    0x01
+#define EXPR_PARSE_NO_MIGRATE 0x02
+#define EXPR_PARSE_NO_REDUCE  0x04
+#define EXPR_PARSE_NO_ASSIGN  0x08
+#define EXPR_PARSE_NO_DATES   0x10
+
+public:
+  typedef uint_least8_t flags_t;
+
+private:
+  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, const flags_t flags) const;
+  ptr_op_t parse_unary_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_mul_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_add_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_logic_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_and_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_or_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_querycolon_expr(std::istream& in, const flags_t flags) const;
+  ptr_op_t parse_value_expr(std::istream& in, const flags_t flags) const;
+
+public:
+  parser_t() : use_lookahead(false) {
+    TRACE_CTOR(parser_t, "");
+  }
+  ~parser_t() throw() {
+    TRACE_DTOR(parser_t);
+  }
+
+  ptr_op_t parse(std::istream& in, const flags_t flags = EXPR_PARSE_NORMAL);
+  ptr_op_t parse(string& str, const flags_t flags = EXPR_PARSE_NORMAL) {
+    std::istringstream stream(str);
+    return parse(stream, flags);
+  }
+};
+
+} // namespace ledger
+
+#endif // _PARSER_H
-- 
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