HOPE(1)HOPE(1)NAMEhope - a lazy interpreter for the functional language Hope
SYNOPSIShope [ -lr ] [ -f file ] [ -t nsecs ] [ args ]
DESCRIPTION
Hope is an interactive interpreter for a lazy variant of the functional
language Hope. It is most commonly run without options or arguments,
and reads commands from the standard input, and prints results on the
standard output. If the standard input is a terminal, hope prompts
with the string `>:'. A simple use is to enter an expression, termi‐
nated by a semicolon. The interpreter will respond by printing the
value and type of the expression, < preceded by `>>'. For example,
>: 6*7;
>> 42 : num
See the documentation for more complicated uses.
OPTIONS
These options are mainly useful for non-interactive use of the inter‐
preter.
-l Generate a listing of the input, with embedded error messages.
-r The interpreter is run in restricted mode: all file I/O is dis‐
abled (except for reading of libraries).
-f file
Read input from file instead of the standard input. This is
useful for Hope scripts, whose first line would be
"#! /usr/local/bin/hope -f arg ...
Any additional arguments will be available through the variable
argv.
-t n Evaluation of any expression is interrupted if it takes more
than n seconds.
FILES
/usr/local/share/hope/lib
The standard library directory.
ENVIRONMENT
HOPEPATH
A colon-separated list of directories to search for Hope modules
in uses commands. An empty entry refers to the standard library
directory. The default value is `.:'.
A Hope module name is stored in a file `name.hop'.
SEE ALSO
· A Hope Interpreter - Reference, Ross Paterson.
· A Hope Tutorial, Roger Bailey.
Both documents should be distributed with this program.
AUTHOR
Ross Paterson <ross@soi.city.ac.uk>
HOPE(1)
