Command programs

The exec package contains procedures that are used to execute the command processor's commands. A command ,foo is executed by applying the value of the identifier foo in the exec package to the (suitably parsed) command arguments.

,exec [command]
Evaluate command in the exec package. For example, use

,exec ,load filename

to load a file containing commands. If no command is given, the exec package becomes the execution package for future commands.

The required argument types are as follows:

• filenames should be strings
• other names and identifiers should be symbols
• expressions should be s-expressions
• commands (as for ,config and ,exec itself) should be lists of the form (command-name argument ...) where command-name is a symbol.

For example, the following two commands are equivalent:

,config ,load my-file.scm

,exec (config '(load "my-file.scm"))

The file scheme/vm/load-vm.scm in the source directory contains an example of an exec program.

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