-/* Copyright (c) 2016. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2016-2018. 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>
#include <functional>
+#include <initializer_list>
+#include <map>
#include <stdexcept>
#include <string>
#include <type_traits>
#include <xbt/base.h>
#include <xbt/config.h>
+#include <xbt/sysdep.h>
namespace simgrid {
namespace config {
-XBT_PUBLIC(bool) parseBool(const char* value);
-XBT_PUBLIC(double) parseDouble(const char* value);
-XBT_PUBLIC(long int) parseLong(const char* value);
-
-template<class T> struct parse_option {
- static inline T parse(const char* value)
- {
- return T(value);
- }
-};
-
-template<> struct parse_option<std::string> {
- static inline std::string parse(const char* value)
- {
- return std::string(value);
- }
-};
-
-template<>
-struct parse_option<double> {
- static inline double parse(const char* value)
- {
- return parseDouble(value);
- }
-};
-
-template<>
-struct parse_option<int> {
- static inline double parse(const char* value)
- {
- return parseLong(value);
- }
-};
-
-template<>
-struct parse_option<bool> {
- static inline bool parse(const char* value)
- {
- return parseBool(value);
- }
+class XBT_PUBLIC 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
-T parse(const char* value)
-{
- return parse_option<T>::parse(value);
-}
-
template<class T> inline
std::string to_string(T&& value)
{
return std::move(value);
}
+// Get config
+
+template <class T> XBT_PUBLIC T const& getConfig(const char* name);
+
+extern template XBT_PUBLIC int const& getConfig<int>(const char* name);
+extern template XBT_PUBLIC double const& getConfig<double>(const char* name);
+extern template XBT_PUBLIC bool const& getConfig<bool>(const char* name);
+extern template XBT_PUBLIC std::string const& getConfig<std::string>(const char* name);
+
// Register:
/** Register a configuration flag
*
* @param name name of the option
* @param description Description of the option
+ * @param value Initial/default value
* @param callback called with the option value
*/
-XBT_PUBLIC(void) declareFlag(const char* name, const char* description,
- std::function<void(const char* value)> callback);
+template <class T>
+XBT_PUBLIC void declareFlag(const char* name, const char* description, T value,
+ std::function<void(const T&)> callback = std::function<void(const T&)>());
-template<class T, class F>
-XBT_PUBLIC(void) declareFlag(const char* name, const char* description, F callback)
+extern template XBT_PUBLIC void declareFlag(const char* name, const char* description, int value,
+ std::function<void(int const&)> callback);
+extern template XBT_PUBLIC void declareFlag(const char* name, const char* description, double value,
+ std::function<void(double const&)> callback);
+extern template XBT_PUBLIC void declareFlag(const char* name, const char* description, bool value,
+ std::function<void(bool const&)> callback);
+extern template XBT_PUBLIC void declareFlag(const char* name, const char* description, std::string value,
+ std::function<void(std::string const&)> callback);
+
+// ***** alias *****
+
+XBT_PUBLIC void alias(const char* realname, const char* aliasname);
+
+inline
+void alias(std::initializer_list<const char*> names)
{
- declareFlag(name, description, [callback](const char* value) {
- callback(parse<T>(value));
- });
+ auto i = names.begin();
+ for (++i; i != names.end(); ++i)
+ alias(*names.begin(), *i);
}
/** Bind a variable to configuration flag
template<class T>
void bindFlag(T& value, const char* name, const char* description)
{
- using namespace std;
- declareFlag(name, description, [&value](const char* val) {
- value = simgrid::config::parse<T>(val);
+ declareFlag<T>(name, description, value, [&value](T const& val) {
+ value = val;
});
- xbt_cfg_setdefault_string(name, simgrid::config::to_string(value).c_str());
}
-/** Bind a variable to configuration flag
- *
- * <pre><code>
- * static int x;
- * simgrid::config::bindFlag(a, "x", [](const char* value) {
- * return simgrid::config::parse(value);
- * }
- * </pre><code>
- */
-// F is a parser, F : const char* -> T
-template<class T, class F>
-typename std::enable_if<std::is_same<
- T,
- typename std::remove_cv< decltype(
- std::declval<F>()(std::declval<const char*>())
- ) >::type
->::value, void>::type
-bindFlag(T& value, const char* name, const char* description,
- F callback)
+template<class T>
+void bindFlag(T& value, std::initializer_list<const char*> names, const char* description)
{
- declareFlag(name, description, [&value,callback](const char* val) {
- value = callback(val);
- });
- xbt_cfg_setdefault_string(name, to_string(value).c_str());
+ bindFlag(value, *names.begin(), description);
+ alias(names);
}
/** Bind a variable to configuration flag
* 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>
void,
decltype( std::declval<F>()(std::declval<const T&>()) )
>::value, void>::type
-bindFlag(T& value, const char* name, const char* description,
+bindFlag(T& value, std::initializer_list<const char*> names, const char* description,
F callback)
{
- declareFlag(name, description, [&value,callback](const char* val) {
- T res = parse<T>(val);
- callback(res);
- value = std::move(res);
- });
- xbt_cfg_setdefault_string(name, to_string(value).c_str());
+ bindFlag(value, *names.begin(), description);
+ alias(names);
}
+template<class T, class F>
+typename std::enable_if<std::is_same<
+ void,
+ decltype( std::declval<F>()(std::declval<const T&>()) )
+>::value, void>::type
+bindFlag(T& value, const char* name, const char* description,
+ F callback)
+{
+ declareFlag(name, description, value,
+ std::function<void(const T&)>([&value,callback](const T& val) {
+ callback(val);
+ value = std::move(val);
+ }
+ ));
+}
+template <class T, class F>
+typename std::enable_if<std::is_same<void, decltype(std::declval<F>()(std::declval<const T&>()))>::value, void>::type
+bindFlag(T& value, const char* name, const char* description, std::map<T, std::string> valid_values, F callback)
+{
+ declareFlag(name, description, value,
+ std::function<void(const T&)>([&value, name, valid_values, callback](const T& val) {
+ callback(val);
+ bool found = false;
+ for (auto kv : valid_values) {
+ if (kv.first == val)
+ found = true;
+ }
+ if (not found || std::string(val) == "help") {
+ std::string mesg;
+ if (std::string(val) == "help")
+ mesg = std::string("\nPossible values for option ") + name + ":\n";
+ else
+ mesg = std::string("\nInvalid value '") + val + "' for option " + name + ". Possible values:\n";
+ for (auto kv : valid_values)
+ mesg += " - '" + std::string(kv.first) + "': " + kv.second +
+ (kv.first == value ? " <=== DEFAULT" : "") + "\n";
+ xbt_die("%s", mesg.c_str());
+ }
+ value = std::move(val);
+ }));
+}
/** Bind a variable to configuration flag
*
* <pre><code>
* static int x;
- * simgrid::config::bindFlag(a, "x", [](int x) { return return x > 0; });
- * </pre><code>
+ * simgrid::config::bindFlag(a, "x", [](int x) { return x > 0; });
+ * </code></pre>
*/
// F is a predicate, F : T const& -> bool
template<class T, class F>
bindFlag(T& value, const char* name, const char* description,
F callback)
{
- declareFlag(name, description, [&value,callback](const char* val) {
- T res = parse<T>(val);
- if (!callback(res))
- throw std::range_error("invalid value");
- value = std::move(res);
- });
- xbt_cfg_setdefault_string(name, to_string(value).c_str());
+ declareFlag(name, description, value,
+ std::function<void(const T&)>([&value, callback](const T& val) {
+ if (not callback(val))
+ throw std::range_error("invalid value.");
+ value = std::move(val);
+ })
+ );
}
/** A variable bound to a CLI option
*
* <pre><code>
* static simgrid::config::flag<int> answer("answer", "Expected answer", 42);
- * static simgrid::config::flag<std::string> name("name", "Ford Prefect", "John Doe");
+ * static simgrid::config::flag<std::string> name("name", "Ford Perfect", "John Doe");
* static simgrid::config::flag<double> gamma("gamma", "Gamma factor", 1.987);
* </code></pre>
*/
simgrid::config::bindFlag(value_, name, desc);
}
+ /* A constructor accepting a callback that will be passed the parameter.
+ * It can either return a boolean (informing whether the parameter is valid), or returning void.
+ */
template<class F>
Flag(const char* name, const char* desc, T value, F callback) : value_(value)
{
simgrid::config::bindFlag(value_, name, desc, std::move(callback));
}
+ /* A constructor accepting a map of valid values -> their description,
+ * and producing an informative error message when an invalid value is passed, or when help is passed as a value.
+ */
+ template <class F>
+ Flag(const char* name, const char* desc, T value, std::map<T, std::string> valid_values, F callback) : value_(value)
+ {
+ simgrid::config::bindFlag(value_, name, desc, std::move(valid_values), std::move(callback));
+ }
+
// No copy:
Flag(Flag const&) = delete;
Flag& operator=(Flag const&) = delete;
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
