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Add useful development assertion

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When debugging snippets after M-x toggle-debug-on-error, errors in the
`post-command-hook' might cause `yas--post-command-handler' to be
removed. That's OK, always check that it's there before attempting any
`yas-expand-snippet' calls, since it is essential to check snippet
movement.

* yasnippet.el (yas-expand-snippet): Assert `yas-minor-mode' and
`yas--post-command-handler' active.
This commit is contained in:
João Távora 2015-03-23 10:10:56 +00:00
parent 316435e03e
commit 885237a485
1 changed files with 4 additions and 0 deletions
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yasnippet.el
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@ -3490,6 +3490,10 @@ The error should be ignored in `debug-ignored-errors'"
Text between START and END will be deleted before inserting
template. EXPAND-ENV is a list of (SYM VALUE) let-style dynamic bindings
considered when expanding the snippet."
(cl-assert (and yas-minor-mode
(memq 'yas--post-command-handler post-command-hook))
nil
"[yas] `yas-expand-snippet' needs properly setup `yas-minor-mode'")
(run-hooks 'yas-before-expand-snippet-hook)
;;