cons.hpp File Reference

#include <iostream>
#include "Cell.hpp"

Go to the source code of this file.

Functions
Cell *	make_int (const int i)
	Make an int cell. More...
Cell *	make_double (const double d)
	Make a double cell. More...
Cell *	make_symbol (const char *const s)
	Make a symbol cell. More...
Cell *	cons (Cell *const my_car, Cell *const my_cdr)
	Make a conspair cell. More...
bool	nullp (Cell *const c)
	Check if c points to an empty list, i.e., is a null pointer. More...
bool	listp (Cell *const c)
	Check if c points to a list (i.e., nil or a cons cell). More...
bool	intp (Cell *const c)
	Check if c points to an int cell. More...
bool	doublep (Cell *const c)
	Check if c points to a double cell. More...
bool	symbolp (Cell *const c)
	Check if c points to a symbol cell. More...
int	get_int (Cell *const c)
	Accessor (error if c is not an int cell). More...
double	get_double (Cell *const c)
	Accessor (error if c is not a double cell). More...
string	get_symbol (Cell *const c)
	Retrieve the symbol name as a string (error if c is not a symbol cell). More...
Cell *	car (Cell *const c)
	Accessor (error if c is not a cons cell). More...
Cell *	cdr (Cell *const c)
	Accessor (error if c is not a string cell). More...
ostream &	operator<< (ostream &os, const Cell &c)
	Print the subtree rooted at c, in s-expression notation. More...

Variables
Cell *const	nil
	The null pointer value. More...

Detailed Description

Encapsulates an abstract interface layer for a cons list ADT, without using member functions. Makes no assumptions about what kind of concrete type Cell will be defined to be.

Function Documentation

Cell* car ( Cell *const  c )

inline

Accessor (error if c is not a cons cell).

Returns

The car pointer in the cons cell pointed to by c.

Referenced by separate_parse().

Cell* cdr ( Cell *const  c )

inline

Accessor (error if c is not a string cell).

Returns

The cdr pointer in the cons cell pointed to by c.

Referenced by separate_parse().

Cell* cons ( Cell *const  my_car, Cell *const  my_cdr  )

inline

Make a conspair cell.

Parameters

my_car	The initial car pointer to be stored in the new cell.
my_cdr	The initial cdr pointer to be stored in the new cell.

Referenced by separate_parse().

bool doublep ( Cell *const  c )

inline

Check if c points to a double cell.

Returns

True iff c points to a double cell.

References nullp().

double get_double ( Cell *const  c )

inline

Accessor (error if c is not a double cell).

Returns

The value in the double cell pointed to by c.

int get_int ( Cell *const  c )

inline

Accessor (error if c is not an int cell).

Returns

The value in the int cell pointed to by c.

string get_symbol ( Cell *const  c )

inline

Retrieve the symbol name as a string (error if c is not a symbol cell).

Returns

The symbol name in the symbol cell pointed to by c.

bool intp ( Cell *const  c )

inline

Check if c points to an int cell.

Returns

True iff c points to an int cell.

References nullp().

bool listp ( Cell *const  c )

inline

Check if c points to a list (i.e., nil or a cons cell).

Returns

True iff c points to a list (i.e., nil or a cons cell).

References nullp().

Cell* make_double ( const double  d )

inline

Make a double cell.

Parameters

d	The initial double value to be stored in the new cell.

Referenced by makecell().

Cell* make_int ( const int  i )

inline

Make an int cell.

Parameters

i	The initial int value to be stored in the new cell.

Referenced by makecell().

Cell* make_symbol ( const char *const  s )

inline

Make a symbol cell.

Parameters

s	The initial symbol name to be stored in the new cell.

Referenced by makecell().

bool nullp ( Cell *const  c )

inline

Check if c points to an empty list, i.e., is a null pointer.

Returns

True iff c points to an empty list, i.e., is a null pointer.

References nil.

Referenced by doublep(), intp(), listp(), and symbolp().

ostream& operator<< ( ostream &  os, const Cell &  c  )

inline

Print the subtree rooted at c, in s-expression notation.

Parameters

os	The output stream to print to.
c	The root cell of the subtree to be printed.

bool symbolp ( Cell *const  c )

inline

Check if c points to a symbol cell.

Returns

True iff c points to a symbol cell.

References nullp().

Variable Documentation

Cell* const nil

The null pointer value.

Referenced by nullp().