Using regular expressions via `re-search-forward` in elisp [duplicate]
This question already has an answer here:
Emacs - regular expressions in Lisp need to be double-escaped - why?
4 answers
I want to search for an regular expression with the function re-search-forward
When I tried using the examples from the page
here: https://www.emacswiki.org/emacs/RegularExpression#toc1
specifically the regular expression w{20,} used to search for a word with 20 letters or more, I get an error.
Here I am placing my cursor after the closing parenthesis in my Lisp buffer and pressing C-x C-e for evaluating it.
However, when I use the Regexp I-search via,
C-M-s it highlights the correct word as expected.
Why is this?
elisp
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
marked as duplicate by phils elisp
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Nov 18 '18 at 5:35
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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This question already has an answer here:
Emacs - regular expressions in Lisp need to be double-escaped - why?
4 answers
I want to search for an regular expression with the function re-search-forward
When I tried using the examples from the page
here: https://www.emacswiki.org/emacs/RegularExpression#toc1
specifically the regular expression w{20,} used to search for a word with 20 letters or more, I get an error.
Here I am placing my cursor after the closing parenthesis in my Lisp buffer and pressing C-x C-e for evaluating it.
However, when I use the Regexp I-search via,
C-M-s it highlights the correct word as expected.
Why is this?
elisp
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
marked as duplicate by phils elisp
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Nov 18 '18 at 5:35
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
This question already has an answer here:
Emacs - regular expressions in Lisp need to be double-escaped - why?
4 answers
I want to search for an regular expression with the function re-search-forward
When I tried using the examples from the page
here: https://www.emacswiki.org/emacs/RegularExpression#toc1
specifically the regular expression w{20,} used to search for a word with 20 letters or more, I get an error.
Here I am placing my cursor after the closing parenthesis in my Lisp buffer and pressing C-x C-e for evaluating it.
However, when I use the Regexp I-search via,
C-M-s it highlights the correct word as expected.
Why is this?
elisp
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
This question already has an answer here:
Emacs - regular expressions in Lisp need to be double-escaped - why?
4 answers
I want to search for an regular expression with the function re-search-forward
When I tried using the examples from the page
here: https://www.emacswiki.org/emacs/RegularExpression#toc1
specifically the regular expression w{20,} used to search for a word with 20 letters or more, I get an error.
Here I am placing my cursor after the closing parenthesis in my Lisp buffer and pressing C-x C-e for evaluating it.
However, when I use the Regexp I-search via,
C-M-s it highlights the correct word as expected.
Why is this?
This question already has an answer here:
Emacs - regular expressions in Lisp need to be double-escaped - why?
4 answers
elisp
elisp
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
asked Nov 18 '18 at 2:51
smilingbuddhasmilingbuddha
5,5072184142
5,5072184142
marked as duplicate by phils elisp
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Nov 18 '18 at 5:35
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Nov 18 '18 at 5:35
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
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1 Answer
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This regexp:
w{20,}
is expressed in a double-quoted elisp string like so:
"\w\{20,\}"
Backslashes are special to the double-quoted read syntax for strings as well as being special to regexp syntax; so if a backslash is for the regexp, you need to double it.
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
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1 Answer
1
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1 Answer
1
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oldest
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active
oldest
votes
active
oldest
votes
This regexp:
w{20,}
is expressed in a double-quoted elisp string like so:
"\w\{20,\}"
Backslashes are special to the double-quoted read syntax for strings as well as being special to regexp syntax; so if a backslash is for the regexp, you need to double it.
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
add a comment |
This regexp:
w{20,}
is expressed in a double-quoted elisp string like so:
"\w\{20,\}"
Backslashes are special to the double-quoted read syntax for strings as well as being special to regexp syntax; so if a backslash is for the regexp, you need to double it.
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
add a comment |
This regexp:
w{20,}
is expressed in a double-quoted elisp string like so:
"\w\{20,\}"
Backslashes are special to the double-quoted read syntax for strings as well as being special to regexp syntax; so if a backslash is for the regexp, you need to double it.
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
This regexp:
w{20,}
is expressed in a double-quoted elisp string like so:
"\w\{20,\}"
Backslashes are special to the double-quoted read syntax for strings as well as being special to regexp syntax; so if a backslash is for the regexp, you need to double it.
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
answered Nov 18 '18 at 5:33
philsphils
57.8k7109142
57.8k7109142
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
add a comment |
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
Notice also how, in the screenshots in the question, the incorrect singular backslashes are coloured red? That is Emacs (26+) telling you that they are probably a mistake.
– phils
Nov 23 '18 at 22:29
add a comment |
