fall-through

See also: fallthrough and fall through

English

Noun

fall-through (plural fall-throughs)

  1. (programming) In certain programming constructs, the situation where execution passes to the next condition in a list unless explicitly redirected.
    • 1997, Bjarne Stroustrup, The C++ Programming Language: Language Libraries and Design
      It is a good idea to comment the (rare) cases in which a fall-through is intentional so that an uncommented fall-through can be assumed to be an error.
    • 2001, Graham M Seed, Barry J Cooper, An Introduction to Object-Oriented Programming in C++
      If you place default elsewhere, then a break will be required to prevent fall-through.
    • 2008, Nagel et al, Professional C# 2008
      Specifically, it prohibits fall-through conditions in almost all cases.

switch (x) {
case 1:
    printf("Printed when x=1");
    break;
case 2:
    printf("Printed when x=2");
case 3:
    printf("Printed when x=2 or x=3");
    break;
}

A case statement in the C programming language containing a fall-through. Because the second case has no "break" at the end, execution will "fall through" to the third case.

Anagrams
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.