Why would a language have a concept of undefined behavior instead …
May 20, 2023 · And the 1999 C Rationale explains why: Undefined behavior gives the implementor license not to catch certain program errors that are difficult to diagnose. It also identifies areas of …
Newest 'undefined-behavior' Questions - Programming Language …
Some languages specify "undefined behavior" for code or actions outside of the specified bounds of the language, which enables certain optimizations. Use this tag for questions about specifying undefined …
When was our current definition of "undefined behavior" first used?
Nov 5, 2023 · The C and C++ standards define "undefined behavior" as "behavior for which this document imposes no requirements". The first instance of this definition I can find is in the first official …
undefined behavior - Is it plausible to let modulo-by-zero have a well ...
Apr 1, 2025 · The C standard states that modulo-by-zero is an undefined behavior, so I can give a custom behavior anyway. But I noted that this idea doesn't work for signed integers because, by the …
undefined behavior - Are there languages that implement a more …
Dec 2, 2023 · People often use unsafe just assuming what a function will do, but without carefully reading the documentation you can easily introduce undefined behavior. Another issue is, suppose a …
undefined behavior - What was the purpose of Tartan's "disable ...
Nov 3, 2023 · The Tartan language, designed during the process that eventually led to Ada, has a disable statement defined as follows: A disable declaration in an inner block suppresses detection of …
Why would a language need to have trap representations?
Jul 10, 2023 · Some implementations have a concept of 'signalling NaN' with unconventional behavior, such as raising a signal upon being encountered by the FPU. A concept of trap representation …
Why would accessing uninitialized memory necessarily be undefined …
Sep 6, 2023 · The undefined behavior only applies when reading "an object of automatic storage duration that could have been declared with the register storage class (never had its address taken), …
Why is type reinterpretation considered highly problematic in many ...
Jul 13, 2023 · By making reinterpreting undefined behavior language implementers have free choice how to represent each type without fear of breaking any well-defined programs. Some languages …
How does one transpile valid code that corresponds to undefined ...
Jun 29, 2023 · How, generally, are such situations handled when transpiling code with defined behavior in one language into another language in which a close literal translation of the code would result in …