#define __COMMAND_ARGUMENT_H
#include <string>
+#include <sstream>
+#include <iostream>
+#include <functional>
-#include <command/descriptive.h>
+#include "parameter.h"
+#include "callable.h"
namespace command {
/**
* Class responsible for handling commandline arguments.
- * Arguments are required,x non-named parameters of program.
+ * Arguments are non-named parameters of program.
*
* Example:
- * ./myprog ARGUMENT
+ * - ./myprog ARGUMENT
+ * - ./myprog /path/to/file
+ * - ./myprog "some argument"
*/
- template<typename ArgumentType>
- class Argument : public Descriptive {
- public:
- typedef void (*)(ArgumentType) FunctionType;
-
+ template<typename ParameterType>
+ class Argument : public Parameter, public Callable<ParameterType> {
protected:
- /**
- * Function handling user Arguments
- */
- FunctionType function;
-
+ ParameterType value;
public:
+ typedef class Argument Type;
+
/**
* Default constructor.
*
* @param description Description of current Argument
* @param function Function used to handle current Argument.
*/
- Argument(std::string description, FunctionType function)
- : Descriptive(description), function(function) {
+ Argument(const std::string & description, void (*function)(ParameterType))
+ : Parameter(description), Callable<ParameterType>(function) {
+ }
+
+ Argument(const std::string & description, std::function<void(ParameterType)> function)
+ : Parameter(description), Callable<ParameterType>(function) {
}
/**
- * Executes command binded with argument
*
- * @param value Value passed to program argument
*/
- void run(ArgumentType value) {
- this->function(value);
+ virtual ~Argument() { }
+
+ /**
+ * \inheritdoc
+ */
+ virtual void handle() {
+ this->call(value);
+ this->used = true;
+ }
+
+ /**
+ * Method used for checking if Argument understands user value.
+ * If so current Argument is flagged as used and no more checks against
+ * it will be done in future.
+ *
+ * \attention If conversion from passed value to ParameterType is
+ * impossible, it is ignored. It means that it is not understanded by
+ * Argument.
+ *
+ * @param argv command line value against which test will be made.
+ *
+ * @return If passed argv is succesfully converted to ParameterType,
+ * returns true and Argument is set as used one. If there was an error
+ * during conversion, method returns false and can be used to check
+ * against next value.
+ */
+ virtual bool understand(const std::string & argv) {
+ std::stringstream ss;
+
+ ss << std::fixed << argv;
+ ss >> value;
+
+ if (!ss.fail()) {
+ return true;
+ }
+
+ return false;
+ }
+
+ /**
+ * \inheritdoc
+ */
+ virtual unsigned int valuePosition(const std::string & ) {
+ return 0;
}
};
}