comparison tests/test-template-functions.t @ 40935:4591c9791a82

templatefuncs: specialize "no match" value of search() to allow % operation

If Python had Maybe or Option, the type of the search() result would be
Option<Mapping>, which can be considered as a 0/1 container of a Mapping.
So it makes sense that {search(r'no match pattern', x) % "whatever"} is
mapped to an empty string.

40934:d3e688b9ef2e

  no
  $ hg log -R a -r2 -T '{search(r"(?P<foo>[a-z]*)", desc).foo}\n'
  no

 group reference with no match
 (TODO: we'll probably want to map it to an empty value)

  $ hg log -R a -r2 -T '{search(r"q", desc) % "match: {0}"}\n'
  hg: parse error: None is not iterable of mappings
  [255]

 bad group names

  $ hg log -R a -r2 -T '{search(r"(?P<0>.)", desc) % "{0}"}\n'
  hg: parse error: search got an invalid pattern: (?P<0>.)

40935:4591c9791a82

  no
  $ hg log -R a -r2 -T '{search(r"(?P<foo>[a-z]*)", desc).foo}\n'
  no

 group reference with no match

  $ hg log -R a -r2 -T '{search(r"q", desc) % "match: {0}"}\n'
  

 bad group names

  $ hg log -R a -r2 -T '{search(r"(?P<0>.)", desc) % "{0}"}\n'
  hg: parse error: search got an invalid pattern: (?P<0>.)