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BOOST_CONTRACT_PRECONDITION — Program preconditions that can be completely disabled at compile-time.
// In header: <boost/contract_macro.hpp>
BOOST_CONTRACT_PRECONDITION(...)
BOOST_CONTRACT_PRECONDITION(f)
expands to code equivalent to the following (note that no code is generated when BOOST_CONTRACT_NO_PRECONDITIONS
is defined):
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS .precondition(f) #endif
Where:
f
is the nullay functor called by this library to check preconditions f()
. Assertions within this functor are usually programmed using BOOST_CONTRACT_ASSERT
, but any exception thrown by a call to this functor indicates a contract assertion failure (and will result in this library calling boost::contract::precondition_failure
). This functor should capture variables by (constant) value, or better by (constant) reference (to avoid extra copies). (This is a variadic macro parameter so it can contain commas not protected by round parenthesis.)
See Also:
Disable Contract Compilation, Preconditions