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Field.h
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Field.h
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/*
* Field.h
*
* Created on: Nov 21, 2012
* Author: nathan
*/
#ifndef FIELD_H_
#define FIELD_H_
#include <vector>
#include <map>
#include <string>
#include <ostream>
#include <boost/variant.hpp>
class Field
{
private:
typedef boost::variant<char, Field> FieldPiece;
std::vector<FieldPiece> content;
//map<Field Name, Field Index>
std::map<std::string, unsigned> fieldNames;
/*
* TODO: Weigh the difference between vector, map, and unordered map.
* Went with map for now because of built-in lookup, but vector (or some
* wrapper) is probably faster and smaller.
*/
public:
//Accessor functions. Use these to evaluate the fields into a single vector.
std::vector<char> resolve() const;
std::string resolveToString() const;
//Instead of creating a new vector like resolve, append to the argument vector
void resolveAppendTo(std::vector<char>& vec) const;
Field& clear();
Field& appendCharacter(char character);
//Append 2 or more characters in sequence
template<typename... chars>
Field& appendCharacter(char character, char character2, chars... rest)
{
//TODO: see if this can be collapsed to 1 function call
appendCharacter(character);
appendCharacter(character2, rest...);
return *this;
}
//char* specific version. Appends up to and ignores terminating null.
Field& appendCharacterArray(const char* chars);
//append a set number of characters to the buffer
Field& appendCharacterArray(const char* chars, unsigned n);
//generic version, for vectors, strings, etc. Does NOT ignore terminating
//null, even with std::string. Use string::data to get a char*.
template<class Array>
Field& appendCharacterArray(const Array& chars)
{
for(char character : chars)
appendCharacter(character);
return *this;
}
//Don't let the similar signatures fool you- append returns *this, and get
//returns the retrieved field
Field& appendField(const std::string& name);
Field& getField(const std::string& name);
//pretty print
void print(std::ostream& stream) const;
};
std::ostream& operator<<(std::ostream& stream, const Field& field);
#endif /* FIELD_H_ */