Switch Statements

Similar to if statements, a switch statement can be used to branch over multiple blocks.

A switch has a condition, the condition must be a concrete integer scalar type. The case selectors must have the same type as the condition.

Like with if, the parentheses around the condition are optional.

A switch can have zero or more case blocks.

A default block is required. Multiple default blocks are not permitted

case and default blocks require braces.

There is no fallthrough in WGSL, but cases can have multiple selectors. default may be included in the multi-selector list.

let a = 4;
switch a {
  case 1, 2, 3: {
  }
  default: {
  }
}

// Default can be included in the selector list
switch a {
  case 1, 2, default: {
  }
}