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(when (gx/maybe-require-package 'orderless)
(require 'orderless)
(setq orderless-matching-styles
'(orderless-literal orderless-regexp orderless-prefixes))
(defun gx/orderless-without-if-bang (pattern _index _total)
(cond
((equal "!" pattern)
'(orderless-literal . ""))
((string-prefix-p "!" pattern)
`(orderless-without-literal . ,(substring pattern 1)))))
(defun gx/orderless-flex-if-twiddle (pattern _index _total)
(when (string-suffix-p "~" pattern)
`(orderless-flex . ,(substring pattern 0 -1))))
(setq orderless-style-dispatchers
'(gx/orderless-without-if-bang
gx/orderless-flex-if-twiddle))
(setq completion-styles '(substring orderless flex)
completion-category-defaults nil
completion-category-overrides
'((file (styles . (partial-completion))))))
(when (gx/maybe-require-package 'cape)
(autoload #'cape-file "cape")
(add-to-list 'completion-at-point-functions #'cape-file))
(provide 'init-completion)
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