On Saturday, 12 December 2020 at 12:03:49 UTC, kdevel wrote:
In some situations a ] must be escaped as in
auto re = regex(`^[a\]]$`); // match a and ] only
Unfortunately dmd/phobos does not warn if you forget the
backslash:
auto re = regex(`^[a]]$`); // match a]
This leads me to the documentation [1] which says
\c where c is one of [|*+?() Matches the character c itself.
] must be added to this list since \] obviously matches ].
Additionally
the statement
any character except [{|*+?()^$ Matches the character
itself.
is not true since ] does not match itself when ] denotes the
end of
a character class. I don't have a suggestion for better wording
yet.
[1] https://dlang.org/phobos/std_regex.html
As I understand it, the statement is indeed true and a regex
`]]]` would match and only match the string `]]]`. What should be
added somewhere is
Inside character classes the character ']' has to be written
as '\]'.
