diff options
Diffstat (limited to 'googlemock/include')
| -rw-r--r-- | googlemock/include/gmock/internal/gmock-pp.h | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/googlemock/include/gmock/internal/gmock-pp.h b/googlemock/include/gmock/internal/gmock-pp.h index 95fcc28b..a077f776 100644 --- a/googlemock/include/gmock/internal/gmock-pp.h +++ b/googlemock/include/gmock/internal/gmock-pp.h @@ -26,30 +26,29 @@ // GMOCK_PP_NARG(PAIR) => 2 // // Requires: the number of arguments after expansion is at most 15. -#define GMOCK_PP_NARG(...) \ - GMOCK_PP_INTERNAL_INTERNAL_16TH( \ - __VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1) +#define GMOCK_PP_NARG(...) \ + GMOCK_PP_INTERNAL_16TH( \ + (__VA_ARGS__, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1)) // Returns 1 if the expansion of arguments has an unprotected comma. Otherwise // returns 0. Requires no more than 15 unprotected commas. -#define GMOCK_PP_HAS_COMMA(...) \ - GMOCK_PP_INTERNAL_EXPAND_WITH( \ - GMOCK_PP_INTERNAL_INTERNAL_16TH, \ - (__VA_ARGS__, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)) +#define GMOCK_PP_HAS_COMMA(...) \ + GMOCK_PP_INTERNAL_16TH( \ + (__VA_ARGS__, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)) // Returns the first argument. #define GMOCK_PP_HEAD(...) \ - GMOCK_PP_INTERNAL_EXPAND_WITH(GMOCK_PP_INTERNAL_HEAD, (__VA_ARGS__)) + GMOCK_PP_INTERNAL_HEAD((__VA_ARGS__)) // Returns the tail. A variadic list of all arguments minus the first. Requires // at least one argument. #define GMOCK_PP_TAIL(...) \ - GMOCK_PP_INTERNAL_EXPAND_WITH(GMOCK_PP_INTERNAL_TAIL, (__VA_ARGS__)) + GMOCK_PP_INTERNAL_TAIL((__VA_ARGS__)) // Calls CAT(_Macro, NARG(__VA_ARGS__))(__VA_ARGS__) #define GMOCK_PP_VARIADIC_CALL(_Macro, ...) \ - GMOCK_PP_INTERNAL_VARIADIC_CALL( \ - _Macro, GMOCK_PP_NARG(__VA_ARGS__), __VA_ARGS__) + GMOCK_PP_IDENTITY( \ + GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__)) // If the arguments after expansion have no tokens, evaluates to `1`. Otherwise // evaluates to `0`. @@ -147,10 +146,6 @@ #define GMOCK_PP_INTENRAL_EMPTY_TUPLE (, , , , , , , , , , , , , , , ) #define GMOCK_PP_INTERNAL_CAT(_1, _2) _1##_2 #define GMOCK_PP_INTERNAL_STRINGIZE(...) #__VA_ARGS__ -#define GMOCK_PP_INTERNAL_INTERNAL_16TH(_1, _2, _3, _4, _5, _6, _7, _8, _9, \ - _10, _11, _12, _13, _14, _15, _16, \ - ...) \ - _16 #define GMOCK_PP_INTERNAL_CAT_5(_1, _2, _3, _4, _5) _1##_2##_3##_4##_5 #define GMOCK_PP_INTERNAL_IS_EMPTY(_1, _2, _3, _4) \ GMOCK_PP_HAS_COMMA(GMOCK_PP_INTERNAL_CAT_5(GMOCK_PP_INTERNAL_IS_EMPTY_CASE_, \ @@ -158,13 +153,24 @@ #define GMOCK_PP_INTERNAL_IS_EMPTY_CASE_0001 , #define GMOCK_PP_INTERNAL_IF_1(_Then, _Else) _Then #define GMOCK_PP_INTERNAL_IF_0(_Then, _Else) _Else -#define GMOCK_PP_INTERNAL_HEAD(_1, ...) _1 -#define GMOCK_PP_INTERNAL_TAIL(_1, ...) __VA_ARGS__ -// Workaround MSVC behavior of treating __VA_ARGS__ with commas as one arg -// _Args must be wrapped in parenthesis -#define GMOCK_PP_INTERNAL_EXPAND_WITH(_Macro, _Args) _Macro _Args -#define GMOCK_PP_INTERNAL_VARIADIC_CALL(_Macro, _N, ...) \ - GMOCK_PP_INTERNAL_EXPAND_WITH(GMOCK_PP_CAT(_Macro, _N),(__VA_ARGS__)) + +// Because of MSVC treating a token with a comma in it as a single token when passed +// to another macro, we need to force it to evaluate it as multiple tokens. We do that +// by using a "IDENTITY(MACRO PARENTHESIZED_ARGS)" macro. +// We define one per possible macro that relies on this behavior. +// Note "_Args" must be parenthesized. +#define GMOCK_PP_INTERNAL_INTERNAL_16TH(_1, _2, _3, _4, _5, _6, _7, _8, _9, \ + _10, _11, _12, _13, _14, _15, _16, \ + ...) \ + _16 +#define GMOCK_PP_INTERNAL_16TH(_Args) \ + GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_16TH _Args) +#define GMOCK_PP_INTERNAL_INTERNAL_HEAD(_1, ...) _1 +#define GMOCK_PP_INTERNAL_HEAD(_Args) \ + GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_HEAD _Args) +#define GMOCK_PP_INTERNAL_INTERNAL_TAIL(_1, ...) __VA_ARGS__ +#define GMOCK_PP_INTERNAL_TAIL(_Args) \ + GMOCK_PP_IDENTITY(GMOCK_PP_INTERNAL_INTERNAL_TAIL _Args) #define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C(...) 1 _ #define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_1 1, |