1.4 KiB
Switch statements
NOTE: Switch statements are not yet supported. They are a planned feature, but will take a long time until they are implemented
Syntax
Switch statements differ quite a lot from other languages, as you can see. First, we have the switch keyword, followed by an expression (the value) in parenthesis. Then, we have a series of case statements, and optionally, a default statement (not necessarily the last one, but the compiler will warn you about it).
In contrast to other C-like languages, cases in a switch statemnets are more like simplified if statements, so they are written with first the case (or default) keyword, followed (if a statement) by the value in parenthesis and after that the statement of the case.
In real code, this would look like this:
switch (value)
case(val1) statement;
case(val2) statement;
...
default statement;
Behavior
Behaves just like an if-elseif-else chain. Compares the value to each given case's values, and runs each case which contains the value in its value list.
Possible optimizations
If a value is determined to not be possible, yet is a case in the switch statement, its going to be removed. For example, the following code:
if (val != 3) {
switch (val)
case (1) printf("1");
case (2) printf("2");
case (3) printf("3");
}
Will be converted to:
if (val != 3) {
switch (val)
case (1) printf("1");
case (2) printf("2");
}