3.2 Invoking mes

The mes command is the Scheme interpreter whose prime directive is to run the MesCC program.

For convenience and testing purposes, mes tries to mimic guile.

mes option… FILE…

The options can be among the following:

-s script arg… ¶

By default, mes will read a file named on the command line as a script. Any command-line arguments arg… following script become the script’s arguments; the command-line function returns a list of strings of the form (script arg…).

Scripts are read and evaluated as Scheme source code just as the load function would. After loading script, mes exits.

-c expr arg… ¶

Evaluate expr as Scheme code, and then exit. Any command-line arguments arg…) following expr become command-line arguments; the command-line function returns a list of strings of the form (guile arg…), where mes is the path of the mes executable.

-- arg…

Run interactively, prompting the user for expressions and evaluating them. Any command-line arguments arg… following the -- become command-line arguments for the interactive session; the command-line function returns a list of strings of the form (guile arg…), where mes is the path of the mes executable.

-L,--load-path=directory

Add directory to the front of Mes module load path. The given directories are searched in the order given on the command line and before any directories in the GUILE_LOAD_PATH environment variable.

-C,--compiled-path=directory

Accepted and ignored for Guile compatibility.

-l file

Load Scheme source code from file, and continue processing the command line.

-e,--main=function

Make function the entry point of the script. After loading the script file (with -s) or evaluating the expression (with -c), apply function to a list containing the program name and the command-line arguments—the list provided by the command-line function.

-h, --help

Display help on invoking mes, and then exit.

-v, --version

Display the current version of mes%, and then exit.

• Environment Variables