Define and use utility class to compare pairs in priority queues.

[simgrid.git] / include / xbt / config.hpp

diff --git a/include/xbt/config.hpp b/include/xbt/config.hpp
index 5187bcd..d457e57 100644 (file)
--- a/include/xbt/config.hpp
+++ b/include/xbt/config.hpp
@@ -1,11 +1,12 @@
-/* Copyright (c) 2016. The SimGrid Team.
- * All rights reserved.                                                     */
+/* Copyright (c) 2016-2017. The SimGrid Team. All rights reserved.          */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#ifndef _XBT_CONFIG_HPP_
-#define _XBT_CONFIG_HPP_
+#ifndef XBT_CONFIG_HPP
+#define XBT_CONFIG_HPP
+
+#include <xbt/base.h>
 
 #include <cstdlib>
 
@@ -22,6 +23,15 @@
 namespace simgrid {
 namespace config {
 
+XBT_PUBLIC_CLASS missing_key_error : public std::runtime_error {
+public:
+  explicit missing_key_error(const std::string& what)
+    : std::runtime_error(what) {}
+  explicit missing_key_error(const char* what)
+    : std::runtime_error(what) {}
+  ~missing_key_error() override;
+};
+
 template<class T> inline
 std::string to_string(T&& value)
 {
@@ -93,7 +103,6 @@ void alias(std::initializer_list<const char*> names)
 template<class T>
 void bindFlag(T& value, const char* name, const char* description)
 {
-  using namespace std;
   declareFlag<T>(name, description, value, [&value](T const& val) {
     value = val;
   });
@@ -114,7 +123,7 @@ void bindFlag(T& value, std::initializer_list<const char*> names, const char* de
  *    if (x < x_min || x => x_max)
  *      throw std::range_error("must be in [x_min, x_max)")
  *  });
- *  </pre><code>
+ *  </code></pre>
  */
 // F is a checker, F : T& -> ()
 template<class T, class F>
@@ -148,7 +157,7 @@ bindFlag(T& value, const char* name, const char* description,
  *  <pre><code>
  *  static int x;
  *  simgrid::config::bindFlag(a, "x", [](int x) { return return x > 0; });
- *  </pre><code>
+ *  </code></pre>
  */
 // F is a predicate, F : T const& -> bool
 template<class T, class F>
@@ -159,8 +168,8 @@ typename std::enable_if<std::is_same<
 bindFlag(T& value, const char* name, const char* description,
   F callback)
 {
-  declareFlag(name, description, value, [&value,callback](const T& val) {
-    if (!callback(val))
+  declareFlag(name, description, value, [&value, callback](const T& val) {
+    if (not callback(val))
       throw std::range_error("invalid value");
     value = std::move(val);
   });
@@ -209,17 +218,26 @@ public:
   operator T const&() const{ return value_; }
 
   // Basic interop with T:
-  Flag& operator=(T const& that) { value_ = that; return *this; }
-  Flag& operator=(T && that)     { value_ = that; return *this; }
-  bool operator==(T const& that) const { return value_ == that; }
-  bool operator!=(T const& that) const { return value_ != that; }
-  bool operator<(T const& that) const { return value_ < that; }
-  bool operator>(T const& that) const { return value_ > that; }
-  bool operator<=(T const& that) const { return value_ <= that; }
-  bool operator>=(T const& that) const { return value_ >= that; }
+  template<class U>
+  Flag& operator=(U const& that) { value_ = that; return *this; }
+  template<class U>
+  Flag& operator=(U && that)     { value_ = that; return *this; }
+  template<class U>
+  bool operator==(U const& that) const { return value_ == that; }
+  template<class U>
+  bool operator!=(U const& that) const { return value_ != that; }
+  template<class U>
+  bool operator<(U const& that) const { return value_ < that; }
+  template<class U>
+  bool operator>(U const& that) const { return value_ > that; }
+  template<class U>
+  bool operator<=(U const& that) const { return value_ <= that; }
+  template<class U>
+  bool operator>=(U const& that) const { return value_ >= that; }
 };
 
 }
 }
+XBT_PUBLIC(std::string) xbt_cfg_get_string(const char* name);
 
 #endif