User:Gennaro Prota/undefined behavior

In a programming language specification (or standard? or possibly wider contexts?), an undefined behavior is a behavior for which the specification imposes no requirements.

[If the expression is also used outside ISO standards, possibly add a sentence: "The expression is used in particular in ISO standards...". Perhaps the terminology is specified in some other ISO document]


 * clarify that in C and C++ undefined behavior apply both to behavior during program translation (!) and program execution


 * point out QoI issues


 * motivations for UB