compile-time-regular-expressions | Compile Time Regular Expression in C++ | Regex library
kandi X-RAY | compile-time-regular-expressions Summary
kandi X-RAY | compile-time-regular-expressions Summary
Fast compile-time regular expressions with support for matching/searching/capturing during compile-time or runtime. You can use the single header version from directory single-header. This header can be regenerated with make single-header. If you are using cmake, you can add this directory as subdirectory and link to target ctre. More info at compile-time.re.
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QUESTION
Say, I have a string
...ANSWER
Answered 2022-Mar-15 at 18:36I know very little about the ctre library so I've probably used some clumsy constructs below, but it's hopefully good enough to get somewhere. I've commented inline to explain what it's doing.
QUESTION
The CTRE library is able to parse and validate regular expressions at compile time using syntax like ctre::match<"REGEX">(text_to_search)
. I know this syntax is only supported in C++20, which is fine, but I am unable use string literals this way no matter what I try. Here's a very simple example:
ANSWER
Answered 2021-Jun-17 at 21:12Being able to do this hinges on a little-known feature of C++20: a non-type template parameter can have a class template type, without template arguments specified. CTAD will determine those arguments.
So you create a class templated by size_t N
, that has char[N]
as a member, is constructible from one, and N
is deducible by CTAD.
Example:
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