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duplicate-case

Suspicious

What This Rule Does​

Checks for duplicate cases in switch statements.

This rule identifies when switch statements have case branches that could be merged together without affecting program behavior. It does not check that the value being switched over is the same; rather it checks whether the target expressions are duplicates.

Examples​

Examples of incorrect code for this rule:

fn foo() void {
  const x = switch (1) {
    1 => 1,
    else => 1,
  };
}

fn bar(y: u32) void {
  const x = switch (y) {
    1 => y + 1,
    2 => 1 + y,
    else => y * 2,
  };
}

Examples of correct code for this rule:

fn foo() void {
  const x = switch (1) {
    1 => 1,
    2 => 2,
  };
}

fn bar(y: u32) void {
  const x = switch (y) {
    1 => y + 1,
    2 => y * 2,
    3 => y - 1,
  };
}

Configuration​

This rule has no configuration.