#426 new
y_feldblum (at yahoo)

<<- strings not highlighting correctly

Reported by y_feldblum (at yahoo) | December 9th, 2010 @ 09:10 PM

Ruby syntax permits usage such as

a = <<-ENDDOC.lines.map(&:strip).join
  a927fd92a927fd92a927fd92a927fd92
  a927fd92a927fd92a927fd92a927fd92
  a927fd92a927fd92a927fd92a927fd92
  a927fd92a927fd92a927fd92a927fd92
ENDDOC

In this example, .lines.map(&:strip).join should not be highlighted as being part of the string. They should be highlighted as regular Ruby method calls. Only the prhase <<-ENDDOC by itself, and the lines following until ENDDOC, should be highlighted.

However, I wonder if it is even possible to parse this using modern simple parsers.

Comments and changes to this ticket

  • tim.felgentreff (at student.hpi.uni-potsdam)

    tim.felgentreff (at student.hpi.uni-potsdam) February 19th, 2011 @ 01:15 PM

    Is this working correctly in Textmate? The Textmate Ruby bundle has a lengthy comment on heardocs to explain how and why they are broken. There simply isn't a way for us to highlight every use of them correctly within the constraints of Textmate grammars. But if it works on TM, it should work on Redcar.

  • ronin-98500 (at lighthouseapp)

    ronin-98500 (at lighthouseapp) February 27th, 2011 @ 04:08 PM

    There are other uses of heredocs that aren't highlighted correctly, e.g.

    foo(<<EOF)
This
is
a
string
EOF

    or

    def foo
  <<EOF
This
is
a
string
EOF
end

    Both don't highlight the heredoc as a string, but as Ruby code. But these uses aren't that common I think, so it's probably OK to not highlight them correctly. I'm on Linux, so no Textmate to test with. :-(

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