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| author | Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com> | 2016-05-13 13:31:14 +0200 |
|---|---|---|
| committer | Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com> | 2016-05-25 06:18:55 +0000 |
| commit | d3cc25ef52d0b2b7ba1cb06609f7c205ee19c2d6 (patch) | |
| tree | ff902c67105d8cb005511103a63d44ec761629b7 /qmake/doc | |
| parent | 3d21634fb693634b7d41a152287d29afb80ac5e2 (diff) | |
add $$num_add() (numeric addition) function
amazing how we managed to do without it for so long. ^^
the name is intentionally somewhat obscure to avoid clashes, and some
namespacing is good anyway.
[ChangeLog][qmake] Added $$num_add() function.
Change-Id: Ib7648b1f425ef096a87b51f158d0f1409e5c4daa
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Diffstat (limited to 'qmake/doc')
| -rw-r--r-- | qmake/doc/src/qmake-manual.qdoc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/qmake/doc/src/qmake-manual.qdoc b/qmake/doc/src/qmake-manual.qdoc index c196cb841a..4e69fd9897 100644 --- a/qmake/doc/src/qmake-manual.qdoc +++ b/qmake/doc/src/qmake-manual.qdoc @@ -2943,6 +2943,27 @@ \c position defaults to 0, causing the first value in the list to be returned. + \section2 num_add(arg1 [, arg2 ..., argn]) + + Takes an arbitrary number of numeric arguments and adds them up, + returning the sum. + + Subtraction is implicitly supported due to the possibility to simply + prepend a minus sign to a numeric value to negate it: + + \code + sum = $$num_add($$first, -$$second) + \endcode + + If the operand may be already negative, another step is necessary to + normalize the number: + + \code + second_neg = -$$second + second_neg ~= s/^--// + sum = $$num_add($$first, $$second_neg) + \endcode + \section2 prompt(question) Displays the specified \c question, and returns a value read from stdin. |