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help: avoid using "$n" parameter in revsetalias example

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Because parsing "$n" requires a crafted tokenizer, it exists only for backward
compatibility (as documented in revset._tokenizealias.) This patch updates the
examples so that users are encouraged to use symbolic names instead of "$n"s.

I'm going to implement alias expansion in templater, which won't support "$n"
parameters to make my life easier. Templater is more complicated than revset
because tokenizer and parser call each other.
This commit is contained in:
Yuya Nishihara 2016-03-26 18:50:56 +09:00
parent 24f7624e5e
commit be362c5e3b
1 changed files with 5 additions and 5 deletions
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10
mercurial/help/revsets.txt
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@ -66,7 +66,7 @@ existing predicates or other aliases. An alias definition looks like::
<alias> = <definition>
in the ``revsetalias`` section of a Mercurial configuration file. Arguments
of the form `$1`, `$2`, etc. are substituted from the alias into the
of the form `a1`, `a2`, etc. are substituted from the alias into the
definition.
For example,
@ -75,8 +75,8 @@ For example,
[revsetalias]
h = heads()
d($1) = sort($1, date)
rs($1, $2) = reverse(sort($1, $2))
d(s) = sort(s, date)
rs(s, k) = reverse(sort(s, k))
defines three aliases, ``h``, ``d``, and ``rs``. ``rs(0:tip, author)`` is
exactly equivalent to ``reverse(sort(0:tip, author))``.
@ -85,14 +85,14 @@ An infix operator ``##`` can concatenate strings and identifiers into
one string. For example::
[revsetalias]
issue($1) = grep(r'\bissue[ :]?' ## $1 ## r'\b|\bbug\(' ## $1 ## r'\)')
issue(a1) = grep(r'\bissue[ :]?' ## a1 ## r'\b|\bbug\(' ## a1 ## r'\)')
``issue(1234)`` is equivalent to ``grep(r'\bissue[ :]?1234\b|\bbug\(1234\)')``
in this case. This matches against all of "issue 1234", "issue:1234",
"issue1234" and "bug(1234)".
All other prefix, infix and postfix operators have lower priority than
``##``. For example, ``$1 ## $2~2`` is equivalent to ``($1 ## $2)~2``.
``##``. For example, ``a1 ## a2~2`` is equivalent to ``(a1 ## a2)~2``.
Command line equivalents for :hg:`log`::