Ypsilon - The implementation of Scheme Programming Language for real-

NAME

       Ypsilon  -  The implementation of Scheme Programming Language for real-
       time applications

SYNOPSIS

       ypsilon [ options ] [--] [ file ] [ arguments ]

DESCRIPTION

       Ypsilon implements full features of R6RS and  R6RS  standard  libraries
       including:

              arbitrary precision integer arithmetic
              rational number
              exact and inexact complex number
              implicitly phased library
              top-level program
              proper tail recursion
              call/cc and dynamic wind
              unicode
              bytevectors
              records
              exceptions and conditions
              i/o
              syntax-case
              hashtables
              enumerations

       More libraries are included to  support  a  wide  variety  of  software
       development.

       Ypsilon reads scheme scripts from files, streams, or prompts.
       Then, it compiles the scripts to intermediate codes for evaluation.
       Compiled  codes will be cached automaticaly to speeding up the edit/run
       cycle.

       Ypsilon  implements  "mostly  concurrent   mark   and   sweep   garbage
       collector".
       It  is  optimized  to  achieve  a  remarkably short pause time which is
       essential for the best quality real-time video games.

OPTIONS

--mute, -m
Suppresses greeting.

--quiet, -q
Suppresses greeting, repl prompt, and repl output.

--verbose, -v
Prints load and compile activities.

--warning, -w
Prints warnings.

--interactive, -i
Enters repl after running the script file.

--r6rs, -6
Conforms R6RS top-level program syntax.
#!r6rs directive is available to be used in the script files for
the precise control.

--compatible, -c
Extends the lexical syntax for the compatibility of the existing
scripts.
For example, the reader reads ’1+’, ’@1’, ’.n’, and ’|u v|’ as
identifiers.
#!compatible directive is available to be used in the script
files for the precise control.

--sitelib=path
Adds sitelib path.
The path is a colon-separated list of directories.
See also YPSILON_SITELIB in the ENVIRONMENT section.

--loadpath=path
Adds load search path.
The path is a colon-separated list of directories.
See also YPSILON_LOADPATH in the ENVIRONMENT section.

--acc=dir
Sets a auto-compile-cache directory.
See also YPSILON_ACC in the ENVIRONMENT section.

--heap-limit=mbytes
Sets a total heap limit in mbytes.

--dump-condition
Default exception handler prints all components of the
condition.

--disable-acc
Disables the auto-compile-cache.

--clean-acc
Cleans up the auto-compile-cache.

--version
Prints the version and exits.

--help Prints help and exit.

-- Indicates no more option to proceed.

ENVIRONMENT

       YPSILON_SITELIB
              A  colon-separated  list  of  the  sitelib directories.  Ypsilon
              traverses the sitelib  directories  to  find  a  library  before
              looking up the system default directory.

       YPSILON_LOADPATH
              A  colon-separated list of the script file directories.  Ypsilon
              traverses directories to find a script file to be loaded.

       YPSILON_ACC
              This is a auto-compile-cache directory.  The directory  must  be
              created in advance as Ypsilon saves compiled codes in it.

AUTHOR