fall-through Questions

5

Solved

I started learning Dart today, and I've come across something that my google skills are having trouble finding. How do I have a fall-through in a non-empty case? My use case is this: I'm writing ...
Northwest asked 23/9, 2012 at 6:13

3

Solved

Code sample: int main(int argc, char **argv) { switch(argc) { case 0: argc = 5; __attribute__((fallthrough)); case 1: break; } } Using gcc 6.3.0, with -std=c11 only, this code gives a w...
Dermoid asked 27/7, 2017 at 11:8

7

Solved

How would you use a switch case when you need to test for a or b in the same case? switch (pageid) { case "listing-page": case "home-page": alert("hello"); break; ...
Parallax asked 28/6, 2011 at 21:57

4

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I’m new to Rust, but as a fan of Haskell, I greatly appreciate the way match works in Rust. Now I’m faced with the rare case where I do need fall-through – in the sense that I would like all matchi...
Trinitroglycerin asked 28/2, 2017 at 13:5

3

Solved

Here the famous "fizz buzz" program in Go using switch/case and if/else conditionals. The problem is that using switch/case is generating unexpected output while if/else (with same conditions) work...
Herby asked 11/9, 2013 at 13:47

1

case "$action" in a|b) echo for a or b ;;& b|c) echo for c or b ;;& *) echo for everything ELSE ;;& esac So, as you can see, I'm using ;;& instead of ;; so that if action=b it ...
Maryammaryann asked 10/12, 2019 at 0:45

2

Solved

What happens when you reach the end of a Go case, does it fall through to the next, or assume that most applications don't want to fall through?
Redfield asked 26/11, 2016 at 18:49

2

We know that a Duff's device makes use of interlacing the structures of a fallthrough switch and a loop like: send(to, from, count) register short *to, *from; register count; { register n = (coun...
Alcoholometer asked 25/1, 2016 at 15:34

0

The match in Rust only executes one arm. I found this code snippet from Murmurhash 3: switch(len & 15) { case 15: k2 ^= ((uint64_t)tail[14]) << 48; case 14: k2 ^= ((uint64_t)tail[13]) ...
Ean asked 28/6, 2019 at 6:35

2

Solved

I was testing C++17 features on GCC compiler version 7.1.0. This is related to the fallthrough attribute and the following example (live example) is adapted from online CPP reference here #includ...
Ehrenburg asked 23/8, 2018 at 10:21

1

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currently in c#7 (version 15.3.4) following code is valid to compile but both variables are legitimately unusable. switch(fruit) { case Apple apple: case Orange orange: // impossible to use app...
Fatshan asked 16/9, 2017 at 14:33

3

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I have the following code: package main import ( "fmt" ) func main() { switch { case 1 == 1: fmt.Println("1 == 1") fallthrough case 2 == 1: fmt.Println("2 == 1") } } Which prints both ...
Implode asked 23/7, 2017 at 18:42

1

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In the following piece of code, I use the standard [[fallthrough]] attribute from C++1z to document that a fallthrough is desired: #include <iostream> int main() { switch (0) { case 0: s...
Pathe asked 11/7, 2017 at 6:16
1

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