LO
<foo>
<regexp>.+@.+</regexp>
</foo>
еще лучше
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LO
<foo>
<regexp>.+@.+</regexp>
</foo>
Oℕ
AS
<foo>
<regexp>.+@.+</regexp>
</foo>
<regexp name="foo>.+@.+</regexp>
AS
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Oℕ
AS
{-# LANUGAGE OverloadedStrings -#}; foo = ".+@.+" :: Regexp
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LO
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