Mercurial > public > mercurial-scm > hg
diff tests/test-command-template.t @ 30115:8e42dfde93d1
templater: provide arithmetic operations on integers
The termwidth template keyword is of limited use without some way to ensure
that margins are respected.
Provide a full set of arithmetic operators (four basic operations plus the
mod function, defined to match Python's // for division), so that you can
create termwidth based layouts that match the user's terminal size
| author | Simon Farnsworth <simonfar@fb.com> |
|---|---|
| date | Sun, 09 Oct 2016 05:51:04 -0700 |
| parents | d1f5f158768e |
| children | 741e5d7f282d |
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--- a/tests/test-command-template.t Sun Oct 09 15:54:42 2016 +0200 +++ b/tests/test-command-template.t Sun Oct 09 05:51:04 2016 -0700 @@ -29,6 +29,111 @@ $ hg merge -q foo $ hg commit -m 'merge' -d '1500001 0' -u 'person' +Test arithmetic operators have the right precedence: + + $ hg log -l 1 -T '{date(date, "%s") + 5 * 10} {date(date, "%s") - 2 * 3}\n' + 1500051 1499995 + $ hg log -l 1 -T '{date(date, "%s") * 5 + 10} {date(date, "%s") * 3 - 2}\n' + 7500015 4500001 + +Test division: + + $ hg debugtemplate -r0 -v '{5 / 2} {mod(5, 2)}\n' + (template + (/ + ('integer', '5') + ('integer', '2')) + ('string', ' ') + (func + ('symbol', 'mod') + (list + ('integer', '5') + ('integer', '2'))) + ('string', '\n')) + 2 1 + $ hg debugtemplate -r0 -v '{5 / -2} {mod(5, -2)}\n' + (template + (/ + ('integer', '5') + (negate + ('integer', '2'))) + ('string', ' ') + (func + ('symbol', 'mod') + (list + ('integer', '5') + (negate + ('integer', '2')))) + ('string', '\n')) + -3 -1 + $ hg debugtemplate -r0 -v '{-5 / 2} {mod(-5, 2)}\n' + (template + (/ + (negate + ('integer', '5')) + ('integer', '2')) + ('string', ' ') + (func + ('symbol', 'mod') + (list + (negate + ('integer', '5')) + ('integer', '2'))) + ('string', '\n')) + -3 1 + $ hg debugtemplate -r0 -v '{-5 / -2} {mod(-5, -2)}\n' + (template + (/ + (negate + ('integer', '5')) + (negate + ('integer', '2'))) + ('string', ' ') + (func + ('symbol', 'mod') + (list + (negate + ('integer', '5')) + (negate + ('integer', '2')))) + ('string', '\n')) + 2 -1 + +Filters bind closer than arithmetic: + + $ hg debugtemplate -r0 -v '{revset(".")|count - 1}\n' + (template + (- + (| + (func + ('symbol', 'revset') + ('string', '.')) + ('symbol', 'count')) + ('integer', '1')) + ('string', '\n')) + 0 + +But negate binds closer still: + + $ hg debugtemplate -r0 -v '{1-3|stringify}\n' + (template + (- + ('integer', '1') + (| + ('integer', '3') + ('symbol', 'stringify'))) + ('string', '\n')) + hg: parse error: arithmetic only defined on integers + [255] + $ hg debugtemplate -r0 -v '{-3|stringify}\n' + (template + (| + (negate + ('integer', '3')) + ('symbol', 'stringify')) + ('string', '\n')) + -3 + Second branch starting at nullrev: $ hg update null @@ -2890,14 +2995,15 @@ $ hg debugtemplate -v '{(-4)}\n' (template (group - ('integer', '-4')) + (negate + ('integer', '4'))) ('string', '\n')) -4 $ hg debugtemplate '{(-)}\n' - hg: parse error at 2: integer literal without digits + hg: parse error at 3: not a prefix: ) [255] $ hg debugtemplate '{(-a)}\n' - hg: parse error at 2: integer literal without digits + hg: parse error: negation needs an integer argument [255] top-level integer literal is interpreted as symbol (i.e. variable name):