diff options
Diffstat (limited to 'modules/lorem-optimum.el')
| -rw-r--r-- | modules/lorem-optimum.el | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/modules/lorem-optimum.el b/modules/lorem-optimum.el index 8aa96345..14f1d666 100644 --- a/modules/lorem-optimum.el +++ b/modules/lorem-optimum.el @@ -219,8 +219,22 @@ Builds and caches the keys list lazily if not already cached." (message "Lorem-optimum learned from file: %s" file)) (defun cj/lipsum (n) - "Return N words of lorem ipsum." - (cj/markov-generate cj/lipsum-chain n '("Lorem" "ipsum"))) + "Return N words of lorem ipsum. +Interactively, prompt for N and echo the generated words. + +Signal a `user-error' when the Markov chain is empty (for example when the +training file `cj/lipsum-default-file' is missing). Without this, callers +such as `cj/lipsum-insert' would insert nil and raise a cryptic wrong-type +error far from the cause. Train the chain with `cj/lipsum-learn-file', +`cj/lipsum-learn-buffer', or `cj/lipsum-learn-region', or restore the file." + (interactive "nNumber of words: ") + (let ((text (cj/markov-generate cj/lipsum-chain n '("Lorem" "ipsum")))) + (unless (and (stringp text) (not (string-empty-p text))) + (user-error "Lorem-optimum chain is empty; train it with cj/lipsum-learn-file or restore %s" + cj/lipsum-default-file)) + (when (called-interactively-p 'any) + (message "%s" text)) + text)) (defun cj/lipsum-insert (n) "Insert N words of lorem ipsum at point." |