main.cpp File Reference

#include <stdexcept>
#include "parse.hpp"
#include "eval.hpp"
#include <sstream>

Functions
void	parse_eval_print (string sexpr)
	Parse and evaluate the s-expression, and print the result. More...
void	readsinglesymbol (ifstream &fin, string &str)
	Read single single symbol into the end of a string buffer. More...
void	readfile (ifstream &fin)
	Read, parse, evaluate, and print the expression one by one from the input stream. More...
void	readfile (char *fn)
	Read the expressions from the file. More...
void	readconsole ()
	Read, parse, evaluate, and print the expression one by one from the standard input, interactively. More...
int	main (int argc, char *argv[])
	Call either the batch or interactive main drivers. More...

Detailed Description

Driver code implementing the main read-parse-eval-print loop. Supports both (1) an interactive mode, and (2) a batch mode where input expressions are read from the file specified by the first command-line argument.

Function Documentation

int main	(	int	argc,
		char *	argv[]
	)

Call either the batch or interactive main drivers.

References readconsole(), and readfile().

void parse_eval_print

(

string

sexpr

)

Parse and evaluate the s-expression, and print the result.

Parameters

sexpr

The string vaule holding the s-expression.

References eval(), and parse().

Referenced by readconsole(), and readfile().

void readconsole

(

)

Read, parse, evaluate, and print the expression one by one from the standard input, interactively.

References parse_eval_print().

Referenced by main().

void readfile

(

ifstream &

fin

)

Read, parse, evaluate, and print the expression one by one from the input stream.

Parameters

fin	The input file stream.

References iswhitespace(), parse_eval_print(), and readsinglesymbol().

Referenced by main(), and readfile().

void readfile

(

char *

fn

)

Read the expressions from the file.

Parameters

fn	The file name.

References readfile().

void readsinglesymbol	(	ifstream &	fin,
		string &	str
	)

Read single single symbol into the end of a string buffer.

Parameters

fin	The input file stream.
str	The string buffer.

References iswhitespace().

Referenced by readfile().