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In mathematical notation, parenthesis and brackets have overloaded meaning, and when it comes to represent intervals, the parenthesis/brackets don't have to match. For example,

(1, 2]

means an interval with left open and right closed. But unfortunately, in math mode in latex mode, this becomes fairly annoying that whenever notation likes this is used, emacs highlights it as error.

For example,

enter image description here

But outside of math mode, it's really not normal if any mismatches happen. I am wondering if you guys got a way to fix it?

enabled minor modes:

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  • When starting from fundamental-mode, activating math-mode, that shouldn't happen. – Andreas Röhler Dec 6 '17 at 6:35
  • @AndreasRöhler are you saying it shouldn't complain? but it does here. – Jason Hu Dec 6 '17 at 15:25
  • @AndreasRöhler i updated with my minor modes. i did try to play with smartparen but it does not seem related. – Jason Hu Dec 6 '17 at 15:27
  • Sorry, my comment missed the point and it was to late for a delete. Probably worth a bug report. – Andreas Röhler Dec 6 '17 at 16:41
  • @AndreasRöhler i am not even sure which party should fix this. should it be the latex mode or emacs? – Jason Hu Dec 6 '17 at 16:44
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AFAIU the error message is sent by blink-matching-open. Calls a var holding blink-matching-check-function, which points to blink-matching-check-mismatch. Finally appears function syntax-after and the char-table.

Please consider reporting it at bug-gnu-emacs@gnu.org.

For the moment customizing var blink-matching-paren to nil avoids the error message - at some cost.

As for the face: M-x customize-face RET show-paren-mismatch RET might mitigate the distraction.

Finally M-x customize-variable RET show-paren-mode RET to off avoids the highlighting.

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  • hmm... it seems caused by something else. I set that variable to nil, then reopen the file again. but i can still see those highlights. – Jason Hu Dec 6 '17 at 17:21
  • @HuStmpHrrr Customizing should affect error message - edited the answer. – Andreas Röhler Dec 6 '17 at 18:22

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