Re: Is there a way make the lex program match multiple line?
От
Wen Yi
Тема
Re: Is there a way make the lex program match multiple line?
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tencent_D2F4990B589DF8AA97A93B645C5CA39BA406@qq.com
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Дерево обсуждения
Is there a way make the lex program match multiple line? "Wen Yi" <896634148@qq.com>
Re: Is there a way make the lex program match multiple line? Tom Lane <tgl@sss.pgh.pa.us>
Re: Is there a way make the lex program match multiple line? "Wen Yi" <896634148@qq.com>
I rewrite, and I think the [']([^']|\n)['] should be [']([^']|\n)+[']
Thanks very much!
Yours,
Wen Yi.
------------------ Original ------------------
From: "Tom Lane" <tgl@sss.pgh.pa.us>;
Date: Sun, Jun 18, 2023 09:50 AM
To: "Wen Yi"<896634148@qq.com>;
Cc: "pgsql-general"<pgsql-general@lists.postgresql.org>;
Subject: Re: Is there a way make the lex program match multiple line?
> Can someone give me some advice to make the ['].+['] match multiple string?
You should check the flex manual, but it's likely that "." doesn't
match newline. Another problem with this pattern is that "."
*does* match "'", so it's ambiguous what will happen with quotes.
You probably need something closer to [']([^']|\n)[']
regards, tom lane
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