1235237 - Fix -Wimplicit-fallthrough warning in storage/

Status: RESOLVED FIXED

(Toolkit :: Storage, defect)

Description

[Chris Peterson [:cpeterson]]

Attachment: storage_MOZ_FALLTHROUGH.patch

storage/mozStoragePrivateHelpers.cpp:234:5 [-Wimplicit-fallthrough] unannotated fall-through between switch labels

This patch fixes a clang -Wimplicit-fallthrough warning (not yet enabled by default in mozilla-central) about switch cases that fall through without a break or return statement. Warnings about intentional fallthroughs can be suppressed with MOZ_FALLTHROUGH, a MFBT macro for a clang compiler annotation. MOZ_FALLTHROUGH is only needed on cases that have code:

switch (foo) {
  case 1: // These cases have no code. No fallthrough annotations are needed.
  case 2:
  case 3:
    foo = 4; // This case has code, so a fallthrough annotation is needed:
    MOZ_FALLTHROUGH;
  default:
    return foo;
}

Comment 1

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/cc04ff0cdede

Comment 2

[Phil Ringnalda (:philor)]

https://hg.mozilla.org/mozilla-central/rev/cc04ff0cdede