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Bug 1001987 - Make MOZ_STATIC_ASSERT_VALID_ARG_COUNT compatible with ICC. r=Waldo

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This commit is contained in:
Birunthan Mohanathas 2014-04-28 07:48:00 +02:00
parent e76fd87034
commit 5e01b2cee4
2 changed files with 7 additions and 4 deletions
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8
mfbt/MacroArgs.h
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@ -75,16 +75,16 @@
* With a prefix of 0.0, it expands to e.g. 0.04. If there are too many
* arguments, it expands to the first argument over the limit. If this
* exceeding argument is a number, the assertion will fail as there is no
* number than can simultaneously be both > 10 and < 0.1. If the exceeding
* argument is not a number, a compile-time error will still occur because the
* exceeding argument is compared to an int and a double.
* number than can simultaneously be both > 10 and == 0. If the exceeding
* argument is not a number, a compile-time error should still occur due to
* the operations performed on it.
*/
#define MOZ_MACROARGS_STRINGIFY_HELPER(x) #x
#define MOZ_STATIC_ASSERT_VALID_ARG_COUNT(...) \
static_assert( \
sizeof(MOZ_MACROARGS_STRINGIFY_HELPER((__VA_ARGS__))) != sizeof("()") && \
(MOZ_PASTE_PREFIX_AND_ARG_COUNT(1, __VA_ARGS__)) > 10 && \
(MOZ_PASTE_PREFIX_AND_ARG_COUNT(0.0, __VA_ARGS__)) < 0.1, \
(int)(MOZ_PASTE_PREFIX_AND_ARG_COUNT(0.0, __VA_ARGS__)) == 0, \
"MOZ_STATIC_ASSERT_VALID_ARG_COUNT requires 1 to 50 arguments") /* ; */
/*

3
mfbt/tests/TestMacroArgs.cpp
View File

@ -6,6 +6,9 @@
#include "mozilla/MacroArgs.h"
MOZ_STATIC_ASSERT_VALID_ARG_COUNT(1);
MOZ_STATIC_ASSERT_VALID_ARG_COUNT(1, 2);
static_assert(MOZ_PASTE_PREFIX_AND_ARG_COUNT(100, a, b, c) == 1003, "");
static_assert(MOZ_PASTE_PREFIX_AND_ARG_COUNT(, a, b, c) == 3, "");