You can set any user variable with the set-variable command. The variable must have the type byte, char, short, int, array of chars, or pointer to char. The command first asks you for the name of the variable to set. You can use completion. After you select the variable, the command asks you for the new value. Then the command shows you the new value.
asks you for a number, as in the set-variable command, it
normally interprets the number you give in base 10. But you can
enter a number in hexadecimal (base 16) by beginning the number with
"0x", just like EEL integer constants. The prefix "0o" means
octal, and "0b" means binary. For example, the numbers "
The set-any-variable command is similar to set-variable,
but also includes system variables. Epsilon uses system
variables to implement its commands; unless you're writing EEL
extensions, there's generally no reason to set them. When an EEL
program defines a new variable, Epsilon considers it a system
variable unless the definition includes the
The show-variable command prompts for the name of the variable you want to see, then displays its value in the echo area. The same restrictions on variable types apply here as to set-variable. The command includes both user and system variables when it completes on variable names.
The edit-variables command in the non-GUI versions of Epsilon lets you browse a list of all variables, showing the current setting of each variable and the help text describing it, as you move through the list. You can use the arrow keys or the normal movement keys to move around the list, or begin typing a variable name to have Epsilon jump to that portion of the list. Press <Enter> to set the value of the currently highlighted variable, then edit the value shown using normal Epsilon commands. To exit from edit-variables, press <Esc> or Ctrl-G. With a numeric argument, the command includes system variables in its list.
In Epsilon for Windows, the edit-variables command behaves differently. It uses the help system to display a list of variables. After selecting a variable, press the Set button to alter its value.
Some Epsilon variables
have a different value in each
buffer. These buffer-specific variables take on a potentially
different value each time the current buffer changes. Each
buffer-specific variable also has a default value. Whenever you create a new buffer, you also automatically
create a new copy of the buffer-specific variable as well. The value
of this buffer-specific variable is initially this default value. In
Epsilon's EEL extension language, you can define a buffer-specific
variable by using the
Just as Epsilon provides
buffer-specific variables, it also provides window-specific
variables. These have a
different value for each window. Whenever you create a new window,
you automatically create a new copy of the window-specific variable
as well. When you split a window in two, both windows initially have
the same values for all their window-specific variables. Each
window-specific variable also has a default value. Epsilon uses the
default value of a window-specific variable when it creates its first
tiled window while starting up, and when it creates pop-up windows.
You define a window-specific variable in EEL with the
If you ask the set-variable command to set a buffer-specific or window-specific variable, it will ask you if you want to set the value for only the current buffer (or window), or the default value, or both. You also can have it set the value in all buffers (or windows).
Variables retain their values until you exit Epsilon, unless you make the change permanent with the write-state command, described in Saving Customizations. This command saves only the default value for buffer-specific and window-specific variables. It does not save the instantiated values of the variable for each buffer or window, since the buffers and windows themselves aren't listed in a state file. Session files, which do list individual buffers and windows, also record selected buffer-specific and window-specific variables.
The show-variable command will generally show you both the default and current values of a buffer-specific or window-specific variable. For string variables, though, the command will ask which you want to see.
The create-variable command lets you define a new variable without using the extension language. It asks for the name, the type, and the initial value.
You can delete a variable, command, macro, subroutine, or color scheme with the delete-name command, or rename one with the change-name command. Neither of these commands will affect any command or subroutine in use at the time you try to alter it.