I always get error when use flymake-mode. And flymake-mode turn off.
So I want to check whether flymake-mode is on. If it is not on, I will turn it on before call flymake-next-error.
Thanks.
Most minor modes are defined using the define-minor-mode
macro. For buffer-local modes, that macro creates a buffer-local variable of the same name as the mode itself1. The variable is non-nil
when the mode is enabled for the current buffer.
Therefore to check whether flymake-mode
is enabled, you can test the variable flymake-mode
(noting that this variable might not be defined at all if the mode has not been enabled):
(and (boundp 'flymake-mode) flymake-mode)
Which, as Thom point out in the comments, can be expressed using the convenient macro:
(bound-and-true-p flymake-mode)
Which we can use as the condition for an if
or when
or unless
expression:
(if (bound-and-true-p flymake-mode)
(message "flymake-mode is on")
(message "flymake-mode is off"))
1 For global minor modes, the corresponding variable is global; but flymake-mode is buffer-local.