cons.hpp File Reference

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

Go to the source code of this file.

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

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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.

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Function Documentation

Cell* car

(

const Cell *

c

)

[inline]

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

Returns:

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

References Cell::get_car().

Referenced by separate_parse().

Cell* cdr

(

const Cell *

c

)

[inline]

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

Returns:

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

References Cell::get_cdr().

Referenced by separate_parse().

Cell* cons	(	const Cell *	my_car,
		const Cell *	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

(

const Cell *

c

)

[inline]

Check if c points to a double cell.

Returns:

True iff c points to a double cell.

References Cell::is_double(), and nullp().

double get_double

(

const Cell *

c

)

[inline]

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

Returns:

The value in the double cell pointed to by c.

References Cell::get_double().

int get_int

(

const Cell *

c

)

[inline]

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

Returns:

The value in the int cell pointed to by c.

References Cell::get_int().

std::string get_symbol

(

const Cell *

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.

References Cell::get_symbol().

bool intp

(

const Cell *

c

)

[inline]

Check if c points to an int cell.

Returns:

True iff c points to an int cell.

References Cell::is_int(), and nullp().

bool listp

(

const Cell *

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 Cell::is_cons(), and nullp().

Cell* make_double

(

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

(

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 *

s

)

[inline]

Make a symbol cell.

Parameters:

s

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

Referenced by makecell().

bool nullp

(

const Cell *

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.

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

std::ostream& operator<<	(	std::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.

References Cell::print().

bool symbolp

(

const Cell *

c

)

[inline]

Check if c points to a symbol cell.

Returns:

True iff c points to a symbol cell.

References Cell::is_symbol(), and nullp().

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Variable Documentation

const Cell* nil

The null pointer value.

Referenced by parse_eval_print().