Merge pull request #4934 from gitfoxi/master

Multi-line regular expressions.

Author: StefanKarpinski

base/exports.jl

@@ -1237,6 +1237,7 @@ export
     @__FILE__,
     @b_str,
     @r_str,
+    @r_mstr,
     @v_str,
     @mstr,
     @unexpected,

base/regex.jl

@@ -34,6 +34,7 @@ end
 Regex(pattern::String) = Regex(pattern, DEFAULT_OPTS)
 
 macro r_str(pattern, flags...) Regex(pattern, flags...) end
+macro r_mstr(pattern, flags...) Regex(pattern, flags...) end
 
 copy(r::Regex) = r
 

doc/manual/strings.rst

@@ -699,6 +699,27 @@ For example, the following regex has all three flags turned on:
     julia> match(r"a+.*b+.*?d$"ism, "Goodbye,\nOh, angry,\nBad world\n")
     RegexMatch("angry,\nBad world")
 
+Sometimes you want use double-quotes in regular expressions. Escaping them can
+be annoying. Now you can use tripple quotes.
+
+.. doctest::
+
+    julia> r = r"""
+           "[^"]*"
+           """xs
+    r"
+           \"[^\"]*\"
+           "sx
+
+Triple-quoted strings have worked for a while now:
+
+.. doctest::
+
+    julia> match(r, """
+           "foo"
+           """)
+    RegexMatch("\"foo\"")
+
 Byte Array Literals
 ~~~~~~~~~~~~~~~~~~~