Moved around most of the files so that source code is in src/, documentation

is in doc/, etc.

1 files changed, 280 insertions, 0 deletions

diff --git a/src/scope.h b/src/scope.h
new file mode 100644
index 00000000..88b45d84
--- /dev/null
+++ b/src/scope.h
@@ -0,0 +1,280 @@
+/*
+ * 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 _SCOPE_H
+#define _SCOPE_H
+
+#include "expr.h"
+#include "op.h"
+
+namespace ledger {
+
+class scope_t
+{
+public:
+  explicit scope_t() {
+    TRACE_CTOR(scope_t, "");
+  }
+  virtual ~scope_t() {
+    TRACE_DTOR(scope_t);
+  }
+
+  virtual expr_t::ptr_op_t lookup(const string& name) = 0;
+
+  value_t resolve(const string& name) {
+    expr_t::ptr_op_t definition = lookup(name);
+    if (definition)
+      return definition->calc(*this);
+    else
+      return NULL_VALUE;
+  }
+
+  virtual optional<scope_t&> find_scope(const std::type_info&, bool = true) {
+    return none;
+  }
+};
+
+template <typename T>
+inline T& find_scope(scope_t& scope, bool skip_this = true) {
+  optional<scope_t&> found = scope.find_scope(typeid(T), skip_this);
+  assert(found);
+  return static_cast<T&>(*found);
+}
+
+template <typename T>
+inline optional<T&> maybe_find_scope(scope_t& scope, bool skip_this = true) {
+  optional<scope_t&> found = scope.find_scope(typeid(T), skip_this);
+  if (found)
+    return optional<T&>(static_cast<T&>(*found));
+  else
+    return none;
+}
+
+class child_scope_t : public noncopyable, public scope_t
+{
+public:
+  scope_t * parent;
+
+  explicit child_scope_t() : parent(NULL) {
+    TRACE_CTOR(child_scope_t, "");
+  }
+  explicit child_scope_t(scope_t& _parent)
+    : parent(&_parent) {
+    TRACE_CTOR(child_scope_t, "scope_t&");
+  }
+  virtual ~child_scope_t() {
+    TRACE_DTOR(child_scope_t);
+  }
+
+  virtual expr_t::ptr_op_t lookup(const string& name) {
+    if (parent)
+      return parent->lookup(name);
+    return expr_t::ptr_op_t();
+  }
+
+  virtual optional<scope_t&> find_scope(const std::type_info& type,
+					bool skip_this = true) {
+    for (scope_t * ptr = (skip_this ? parent : this); ptr; ) {
+      if (typeid(*ptr) == type)
+	return *ptr;
+      if (child_scope_t * scope = dynamic_cast<child_scope_t *>(ptr))
+        ptr = scope->parent;
+      else
+	ptr = NULL;
+    }
+    return none;
+  }
+};
+
+class symbol_scope_t : public child_scope_t
+{
+  typedef std::map<const string, expr_t::ptr_op_t> symbol_map;
+
+  symbol_map symbols;
+
+public:
+  explicit symbol_scope_t() {
+    TRACE_CTOR(symbol_scope_t, "");
+  }
+  explicit symbol_scope_t(scope_t& _parent) : child_scope_t(_parent) {
+    TRACE_CTOR(symbol_scope_t, "scope_t&");
+  }
+  virtual ~symbol_scope_t() {
+    TRACE_DTOR(symbol_scope_t);
+  }
+
+  void define(const string& name, const value_t& val) {
+    define(name, expr_t::op_t::wrap_value(val));
+  }
+  void define(const string& name, const function_t& func) {
+    define(name, expr_t::op_t::wrap_functor(func));
+  }
+  virtual void define(const string& name, expr_t::ptr_op_t def);
+
+  virtual expr_t::ptr_op_t lookup(const string& name);
+};
+
+class call_scope_t : public child_scope_t
+{
+  value_t args;
+
+  call_scope_t();
+
+public:
+  explicit call_scope_t(scope_t& _parent) : child_scope_t(_parent) {
+    TRACE_CTOR(call_scope_t, "scope_t&");
+  }
+  virtual ~call_scope_t() {
+    TRACE_DTOR(call_scope_t);
+  }
+
+  void set_args(const value_t& _args) {
+    args = _args;
+  }
+  value_t& value() {
+    return args;
+  }
+
+  value_t& operator[](const unsigned int index) {
+    // jww (2008-07-21): exception here if it's out of bounds
+    return args[index];
+  }
+  const value_t& operator[](const unsigned int index) const {
+    // jww (2008-07-21): exception here if it's out of bounds
+    return args[index];
+  }
+
+  void push_back(const value_t& val) {
+    args.push_back(val);
+  }
+  void pop_back() {
+    args.pop_back();
+  }
+
+  const std::size_t size() const {
+    return args.size();
+  }
+};
+
+template <typename T>
+class ptr_t : public noncopyable
+{
+  T * value;
+
+  ptr_t();
+
+public:
+  ptr_t(scope_t& scope, const string& name)
+    : value(scope.resolve(name).template as_pointer<T>()) {
+    TRACE_CTOR(ptr_t, "scope_t&, const string&");
+  }
+  ptr_t(call_scope_t& scope, const unsigned int idx)
+    : value(scope[idx].template as_pointer<T>()) {
+    TRACE_CTOR(ptr_t, "call_scope_t&, const unsigned int");
+  }
+  ~ptr_t() throw() {
+    TRACE_DTOR(ptr_t);
+  }
+
+  T& operator *() { return *value; }
+  T * operator->() { return value; }
+};
+
+template <typename T>
+class var_t : public noncopyable
+{
+  optional<value_t> value;
+
+  var_t();
+
+public:
+  var_t(scope_t& scope, const string& name)
+  {
+    TRACE_CTOR(var_t, "scope_t&, const string&");
+
+    try {
+      value = scope.resolve(name);
+    }
+    catch (...) {
+      DEBUG("scope.var_t", "Failed lookup var_t(\"" << name << "\")");
+      value = none;
+    }
+  }
+
+  var_t(call_scope_t& scope, const unsigned int idx)
+  {
+    TRACE_CTOR(var_t, "call_scope_t&, const unsigned int");
+
+    if (idx < scope.size())
+      value = scope[idx];
+    else
+      value = none;
+  }
+
+  ~var_t() throw() {
+    TRACE_DTOR(var_t);
+  }
+
+  operator bool() { return value; }
+
+  T& operator *();
+  const T& operator *() const;
+
+  T * operator->() {
+    return &**this;
+  }
+  const T * operator->() const {
+    return &**this;
+  }
+};
+
+template <>
+inline long& var_t<long>::operator *() {
+  return value->as_long_lval();
+}
+template <>
+inline const long& var_t<long>::operator *() const {
+  return value->as_long();
+}
+
+template <>
+inline string& var_t<string>::operator *() {
+  return value->as_string_lval();
+}
+template <>
+inline const string& var_t<string>::operator *() const {
+  return value->as_string();
+}
+
+} // namespace ledger
+
+#endif // _SCOPE_H
+