System
------
These procedures are provided by all implementations.
- Procedure: slib:load-source name
Loads a file of Scheme source code from NAME with the default
filename extension used in SLIB. For instance if the filename
extension used in SLIB is `.scm' then `(slib:load-source "foo")'
will load from file `foo.scm'.
- Procedure: slib:load-compiled name
On implementations which support separtely loadable compiled
modules, loads a file of compiled code from NAME with the
implementation's filename extension for compiled code appended.
- Procedure: slib:load name
Loads a file of Scheme source or compiled code from NAME with the
appropriate suffixes appended. If both source and compiled code
are present with the appropriate names then the implementation
will load just one. It is up to the implementation to choose
which one will be loaded.
If an implementation does not support compiled code then
`slib:load' will be identical to `slib:load-source'.
- Procedure: slib:eval obj
`eval' returns the value of OBJ evaluated in the current top level
environment. Note:Eval provides a more general evaluation
facility.
- Procedure: slib:eval-load filename eval
FILENAME should be a string. If filename names an existing file,
the Scheme source code expressions and definitions are read from
the file and EVAL called with them sequentially. The
`slib:eval-load' procedure does not affect the values returned by
`current-input-port' and `current-output-port'.
- Procedure: slib:warn arg1 arg2 ...
Outputs a warning message containing the arguments.
- Procedure: slib:error arg1 arg2 ...
Outputs an error message containing the arguments, aborts
evaluation of the current form and responds in a system dependent
way to the error. Typical responses are to abort the program or
to enter a read-eval-print loop.
- Procedure: slib:exit n
- Procedure: slib:exit
Exits from the Scheme session returning status N to the system.
If N is omitted or `#t', a success status is returned to the
system (if possible). If N is `#f' a failure is returned to the
system (if possible). If N is an integer, then N is returned to
the system (if possible). If the Scheme session cannot exit an
unspecified value is returned from `slib:exit'.