880492 - use GCC's typeof when decltype is not available

Status: RESOLVED FIXED

(Core :: MFBT, defect)

Description

[Karl Tomlinson (:karlt)]

decltype can be useful, but is not available when compiling with gcc 4.4.

typeof sounds very similar:

"A `typeof'-construct can be used anywhere a typedef name could be
used.  For example, you can use it in a declaration, in a cast, or
inside of `sizeof' or `typeof'."

"If you are writing a header file that must work when included in ISO C
programs, write `__typeof__' instead of `typeof'."

Comment 1

[Karl Tomlinson (:karlt)]

Attachment: patch

Comment 2

[Jeff Walden [:Waldo]]

Comment on attachment 759470 [details] [diff] [review]
patch

Review of attachment 759470 [details] [diff] [review]:
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If bug 810274 comment 18 is correct that we might be able to reconsider decltype in Firefox 25, this is gonna have a short lifetime, but that's probably not a bad thing.

Comment 3

[Karl Tomlinson (:karlt)]

https://hg.mozilla.org/integration/mozilla-inbound/rev/03b0f599a003

Comment 4

[Ed Morley [:emorley]]

https://hg.mozilla.org/mozilla-central/rev/03b0f599a003