83 lines
1.9 KiB
Groff
83 lines
1.9 KiB
Groff
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.TH LS48 1
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.\" File scsh.man: Manual page template for scsh.
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.\" Replace LSCSH with the name of your default image and LLIB with the
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.\" directory containing scshvm and default image.
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.SH NAME
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LSCSH \- a Scheme shell
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.SH SYNOPSIS
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.B LSCSH
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[switch arg1 ... argn]
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.SH DESCRIPTION
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.B LSCSH
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is an implementation of the Scheme shell.
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It is implemented as
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a heap image which is interpreted by a modified version of
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the Scheme 48 virtual machine.
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.B LSCSH
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is a stub program that starts the virtual machine on the scsh heap image.
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.PP
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The
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.B LSCSH
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command loop reads Scheme expressions,
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evaluates them, and prints their results.
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The Scheme 48 system is an R4RS system, and also provides features from
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the draft R5RS standard.
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It also executes commands, which are identified by an initial comma character.
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Type the command
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.I ,help
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to receive a list of available commands, or see the documentation for
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Scheme 48.
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.PP
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Scsh's
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.I switch
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argument can be one of
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.LP
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.B \-s
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.BI script
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.LP
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.B \-\-
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.LP
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Either of these switches terminates argument parsing; following arguments
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are available from scsh as the string list produced by
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.nf
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(command-line-arguments)
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.fi
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The
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.B \-s
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.BI script
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switch causes scsh to run in batch mode,
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first loading the script and then exiting.
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The default error exception handler terminates the process.
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If the
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.B \-s
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switch is not specified, scsh operates in interactive mode.
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It invokes the Scheme 48 top-level read-eval-print loop,
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from which the user can enter forms to be evaluated.
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In interactive mode, the default error handler invokes an interactive
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debugging breakpoint.
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The
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.B \-\-
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switch is used to pass arguments to an interactive scsh.
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It simply terminates argument parsing, causing following
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arguments to be bound to
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.nf
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(command-line-arguments)
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.SH FILES
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.TP
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.B LLIB/doc/
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The detailed documentation for scsh.
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.TP
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.B LLIB/scshvm
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the virtual machine.
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.TP
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.B LLIB/LSCSH.image
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the default image.
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.SH BUGS
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Too big; starts up too slowly.
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