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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. |