triple-quoted regular expressions, triple-quoted string docs

[gitfoxi]

I notice that triple-quoted strings have been implemented. This is a good feature.

1. It is not documented in the manual under Strings.
2. It is not implemented for Regex strings

I wish I could do this:

match(r"""\s*
  "[^"]*"\s*
  """ix, """
  "foo"
  """)

[Edit: title, formatting – @StefanKarpinski]

[StefanKarpinski]

Good issue. Thanks for filing it.

[StefanKarpinski]

So, I changed the title to make it more general and then realized that we already support triple-quoted non-standard strings, but you just have to implement the corresponding @r_mstr macro for them. So yeah, the original title was accurate. This is pretty easy to do. Someone just needs to implement the @r_mstr macro.

[gitfoxi]

This works:

macro r_mstr(p,o) Regex(p,o) end

Then I can do

julia> re = r"""
       "[^"]*"
       """xs
r"
       \"[^\"]*\"
       "sx

julia> match(re, """
       "asdf"
       """)
RegexMatch("\"asdf\"")

The macro just needs to go in share/julia/base/regex.jl and then some documentation in share/julia/doc/manual/strings.rst

[gitfoxi]

Maybe I will do the PR since it's so easy. Making the actual PR is the hard part ...

[gitfoxi]

macro r_mstr(pattern, flags...) Regex(pattern, flags...) end