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| author | Shahbaz Youssefi <syoussefi@google.com> | 2019-12-16 11:23:21 -0500 |
|---|---|---|
| committer | Shahbaz Youssefi <syoussefi@google.com> | 2019-12-16 11:27:52 -0500 |
| commit | d2016469064bdb488ce271c84684518d2716fec2 (patch) | |
| tree | ca634916ef74462e613d53bf940076a21363d1c0 /ci | |
| parent | 5b162a79d49d044690f3eb7d87ecc3b98a3f2e25 (diff) | |
| download | googletest-d2016469064bdb488ce271c84684518d2716fec2.tar.gz googletest-d2016469064bdb488ce271c84684518d2716fec2.tar.bz2 googletest-d2016469064bdb488ce271c84684518d2716fec2.zip | |
Workaround VS bug w.r.t empty arguments to macros
Empty arguments can be passed to macros per C99 and C++11 specs, which
can then be forwarded to other macros.
Visual Studio's compiler has a bug in the following situation:
#define A(x) #x
#define B(x, y) A(x)
B(, b)
In the above case, Visual Studio first expands x to nothing, then
complains that A is not invoked with the right amount of arguments.
However, x in A(x) is still one argument, even if it expands to no
preprocessing tokens. See also https://stackoverflow.com/a/7674214.
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