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/*
* Copyright (C) 2007-2012 Xagasoft, All rights reserved.
*
* This file is part of the Xagasoft Build and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef VARIABLE_H
#define VARIABLE_H
#include "types.h"
#include <bu/archivebase.h>
/**
* A build variable, which is basically a flexible, limited type range variant.
*/
class Variable
{
friend Bu::ArchiveBase &operator<<( Bu::ArchiveBase &ar, const Variable &v );
friend Bu::ArchiveBase &operator>>( Bu::ArchiveBase &ar, Variable &v );
public:
enum Type
{
typeNone,
typeBool,
typeInt,
typeFloat,
typeVersion,
typeString,
typeList,
typeRef, /**< Reference by name, it's just a string. */
typeOpaque /**< Only useful to functions. */
};
public:
Variable();
Variable( Type t );
Variable( int iVal );
Variable( double fVal );
Variable( bool bVal );
Variable( const Bu::String &sVal );
Variable( const char *sVal );
Variable( const Variable &v );
Variable( const class AstLeaf &l );
/**
* This special case function turns the variable into a string if there is
* only one string in the list, or a list of strings if there is more or
* less than one.
*/
Variable( const StrList &lst );
Variable( const VarList &lst );
Variable( void *oVal );
virtual ~Variable();
static Variable mkRef( const Bu::String &sVal );
Type getType() const;
// Raw aquisition functions, if the type isn't right,
// they throw an exception
int getInt() const;
double getFloat() const;
bool getBool() const;
const Bu::String &getString() const;
const VarList &getList() const;
const void *getOpaque() const;
// Conversion functions, they'll return the requested type, maybe an error
// if the source data is really bad
int toInt() const;
double toFloat() const;
bool toBool() const;
Bu::String toString() const;
VarList toList() const;
Variable toType( Type eNewType ) const;
void append( const Variable &v );
VarList::iterator begin();
VarList::const_iterator begin() const;
void doNegate();
void doNot();
const Variable &operator=( const Variable &rhs );
const Variable &operator=( const int &rhs );
const Variable &operator=( const double &rhs );
const Variable &operator=( const bool &rhs );
const Variable &operator=( const Bu::String &rhs );
const Variable &operator=( void *rhs );
const Variable &operator+=( const Variable &rhs );
const Variable &operator<<( const Variable &rhs );
bool operator==( const Variable &rhs ) const;
bool operator!=( const Variable &rhs ) const;
bool operator<( const Variable &rhs ) const;
bool operator>( const Variable &rhs ) const;
bool operator<=( const Variable &rhs ) const;
bool operator>=( const Variable &rhs ) const;
Variable operator+( const Variable &rhs ) const;
Variable operator-( const Variable &rhs ) const;
Variable operator*( const Variable &rhs ) const;
Variable operator/( const Variable &rhs ) const;
private:
Type eType;
union
{
int iVal;
double fVal;
bool bVal;
Bu::String *sVal;
VarList *lVal;
void *oVal;
} uVal;
void reset( Type eType );
};
namespace Bu
{
class Formatter;
}
Bu::Formatter &operator<<( Bu::Formatter &f, const Variable::Type &t );
Bu::Formatter &operator<<( Bu::Formatter &f, const Variable &v );
Bu::ArchiveBase &operator<<( Bu::ArchiveBase &ar, const Variable &v );
Bu::ArchiveBase &operator>>( Bu::ArchiveBase &ar, Variable &v );
VarList operator-( const VarList &rBase, const VarList &rSub );
#endif
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