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authorEelco Dolstra <e.dolstra@tudelft.nl>2011-07-06T10·58+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2011-07-06T10·58+0000
commit56370378023fc84eb0153b991f4138f6acd011e3 (patch)
tree19034285effef61c373eef092e91f717c4cea020 /src/bin2c
parent34f4b91820796381d04c6e00ea5e805cf53d25da (diff)
* In the ‘?’ operator, allow attribute paths. For instance, you can
  write ‘attrs ? a.b’ to test whether ‘attrs’ has an attribute ‘a’
  containing an attribute ‘b’.  This is more convenient than ‘attrs ?
  a && attrs.a ? b’.

  Slight change in the semantics: it's no longer an error if the
  left-hand side of ‘?’ is not an attribute set.  In that case it just
  returns false.  So, ‘null ? foo’ no longer throws an error.

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