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Diffstat (limited to 'share/cmake-3.18/Help/command/math.rst')
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diff --git a/share/cmake-3.18/Help/command/math.rst b/share/cmake-3.18/Help/command/math.rst new file mode 100644 index 0000000..ddb1ec6 --- /dev/null +++ b/share/cmake-3.18/Help/command/math.rst @@ -0,0 +1,37 @@ +math +---- + +Evaluate a mathematical expression. + +.. code-block:: cmake + + math(EXPR <variable> "<expression>" [OUTPUT_FORMAT <format>]) + +Evaluates a mathematical ``<expression>`` and sets ``<variable>`` to the +resulting value. The result of the expression must be representable as a +64-bit signed integer. + +The mathematical expression must be given as a string (i.e. enclosed in +double quotation marks). An example is ``"5 * (10 + 13)"``. +Supported operators are ``+``, ``-``, ``*``, ``/``, ``%``, ``|``, ``&``, +``^``, ``~``, ``<<``, ``>>``, and ``(...)``; they have the same meaning +as in C code. + +Hexadecimal numbers are recognized when prefixed with ``0x``, as in C code. + +The result is formatted according to the option ``OUTPUT_FORMAT``, +where ``<format>`` is one of + +``HEXADECIMAL`` + Hexadecimal notation as in C code, i. e. starting with "0x". +``DECIMAL`` + Decimal notation. Which is also used if no ``OUTPUT_FORMAT`` option + is specified. + + +For example + +.. code-block:: cmake + + math(EXPR value "100 * 0xA" OUTPUT_FORMAT DECIMAL) # value is set to "1000" + math(EXPR value "100 * 0xA" OUTPUT_FORMAT HEXADECIMAL) # value is set to "0x3e8" |