parse.hpp File Reference

#include "cons.hpp"

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Functions
Cell *	parse (string sexpr)
	Recursively parse sexpr and build the parse tree. More...
bool	iswhitespace (char ch)
	Check whether the character is whitespace. More...

Detailed Description

Encapsulates the interface for the expression parsing function, which analyzes a string containing an s-expression, and determines its tree structure.

Function Documentation

bool iswhitespace

(

char

ch

)

Check whether the character is whitespace.

Returns

True if it is character, false else.

Parameters

ch	The character to check.

Referenced by clearwhitespace(), readfile(), readsinglesymbol(), and separate_parse().

Cell* parse

(

string

sexpr

)

Recursively parse sexpr and build the parse tree.

Parameters

sexpr

The s-expression stored in a string variable (note that this version of parse has side effects: it may alter the contents of sexpr).

Returns

A pointer to the conspair cell at the root of the parse tree.

References clearwhitespace(), is_legalexpr(), makecell(), and separate_parse().

Referenced by parse_eval_print(), and separate_parse().