1 files changed, 106 insertions, 0 deletions
diff --git a/src/predicate.h b/src/predicate.h
new file mode 100644
index 00000000..b3b81f9b
--- /dev/null
+++ b/src/predicate.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2003-2009, 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.
+ */
+
+/**
+ * @addtogroup expr
+ */
+
+/**
+ * @file   predicate.h
+ * @author John Wiegley
+ *
+ * @ingroup expr
+ */
+#ifndef _PREDICATE_H
+#define _PREDICATE_H
+
+#include "expr.h"
+#include "commodity.h"
+#include "annotate.h"
+
+namespace ledger {
+
+class query_t;
+
+class predicate_t : public expr_t
+{
+public:
+  keep_details_t what_to_keep;
+
+  predicate_t(const keep_details_t& _what_to_keep = keep_details_t())
+    : what_to_keep(_what_to_keep) {
+    TRACE_CTOR(predicate_t, "");
+  }
+  predicate_t(const predicate_t& other)
+    : expr_t(other), what_to_keep(other.what_to_keep) {
+    TRACE_CTOR(predicate_t, "copy");
+  }
+  predicate_t(const query_t& other);
+
+  predicate_t(const string& str, const keep_details_t& _what_to_keep,
+	      const parse_flags_t& flags = PARSE_DEFAULT)
+    : expr_t(str, flags), what_to_keep(_what_to_keep) {
+    TRACE_CTOR(predicate_t, "string, keep_details_t, parse_flags_t");
+  }
+  predicate_t(std::istream& in, const keep_details_t& _what_to_keep,
+	      const parse_flags_t& flags = PARSE_DEFAULT)
+    : expr_t(in, flags), what_to_keep(_what_to_keep) {
+    TRACE_CTOR(predicate_t, "std::istream&, keep_details_t, parse_flags_t");
+  }
+  virtual ~predicate_t() {
+    TRACE_DTOR(predicate_t);
+  }
+
+  virtual value_t real_calc(scope_t& scope) {
+    return (*this ?
+	    expr_t::real_calc(scope)
+	      .strip_annotations(what_to_keep)
+	      .to_boolean() :
+	    true);
+  }
+
+#if defined(HAVE_BOOST_SERIALIZATION)
+private:
+  /** Serialization. */
+
+  friend class boost::serialization::access;
+
+  template<class Archive>
+  void serialize(Archive& ar, const unsigned int /* version */) {
+    ar & boost::serialization::base_object<expr_t>(*this);
+    ar & what_to_keep;
+  }
+#endif // HAVE_BOOST_SERIALIZATION
+};
+
+} // namespace ledger
+
+#endif // _PREDICATE_H