Moods

From the standpoint of the user, the Elan Programming Environment can be in a number of moods (states), each with its own behaviour. In each of those moods, the Elan Programming Environment accepts a number of single-letter commands. These moods, with their associated commands are:

• command-mood
  c d e f l p q r s t v w x (see 5.3)
• edit-mood
  <RET> <BREAK> (see 5.4)
• execute-mood
  <BREAK> (see 5.5)
• backtrace-mood
  e n q s (see 5.5.2)
• trace-mood
  b c e n p q s x <BREAK> (see 5.5.3)
• verify-mood
  b c e n p q s x <BREAK> (see 5.5.4)

The current mood is indicated by a message in the right-hand corner of the bottom line of the screen, the status line. The left-hand corner of the status line is used for error messages.

Each mood has its own set of possible commands, some of which will cause the Elan Programming Environment to switch into another mood.