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SPDX-License-Identifier: CC-BY-SA-4.0
copyrights:
- Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
enabled-by: true
functional-type: function
links:
- role: interface-function
uid: ../if/pure
rationale: null
references: []
requirement-type: functional
text: |
When the code is compiled with the GNU C compiler,
and the ${../if/pure:/name} macro is attached to a
function declaration or definition,
and the function has no observable effects on the state of the program other
than to return a value,
the ${../if/pure:/name} macro shall permit the compiler to replace
subsequent calls to the function with the same argument values by the result
of the first call
provided the state of the program observable by that function
does not change in between two calls.
type: requirement
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