Synopsis
Load a function from a file
Usage
autoload (String_Type funct, String_Type file)
Description
The autoload function is used to declare funct to the
interpreter and indicate that it should be loaded from file when
it is actually used.
Example
Suppose
bessel_j0 is a function defined in the file
bessel.sl . Then the statement
autoload ("bessel_j0", "bessel.sl");
will cause
bessel.sl to be loaded prior to the execution of
bessel_j0
See also
Synopsis
Compile a file to byte-code for faster loading.
Usage
byte_compile_file (String_Type file, Integer_Type method)
Description
The byte_compile_file function byte-compiles file
producing a new file with the same name except a 'c' is added
to the output file name. For example, file is
"site.sl" , then the function produces a new file named
site.slc .
Notes
The method parameter is not used in the current
implementation. Its use is reserved for the future. For now, set
it to 0 .
See also
function eval
Synopsis
Interpret a string as SLang code
Usage
eval (String_Type expression)
Description
The eval function parses a string as S-Lang code and executes the
result. This is a useful function in many contexts such as dynamically
generating function definitions where there is no way to generate
them otherwise.
Example
if (0 == is_defined ("my_function"))
eval ("define my_function () { message (\"my_function\"); }");
See also
Synopsis
Interpret a file containing SLang code.
Usage
Integer_Type evalfile (String_Type file)
Description
The evalfile function loads file into the interpreter.
If no errors were encountered, 1 will be returned; otherwise,
a SLang error will be generated and the function will return zero.
Example
define load_file (file)
{
ERROR_BLOCK { _clear_error (); }
() = evalfile (file);
}
See also