diff options
Diffstat (limited to 'googlemock/include/gmock/internal/gmock-pp.h')
| -rw-r--r-- | googlemock/include/gmock/internal/gmock-pp.h | 108 |
1 files changed, 31 insertions, 77 deletions
diff --git a/googlemock/include/gmock/internal/gmock-pp.h b/googlemock/include/gmock/internal/gmock-pp.h index 1ab80e1..c3759f6 100644 --- a/googlemock/include/gmock/internal/gmock-pp.h +++ b/googlemock/include/gmock/internal/gmock-pp.h @@ -1,19 +1,6 @@ #ifndef THIRD_PARTY_GOOGLETEST_GOOGLEMOCK_INCLUDE_GMOCK_PP_H_ #define THIRD_PARTY_GOOGLETEST_GOOGLEMOCK_INCLUDE_GMOCK_PP_H_ -#undef GMOCK_PP_INTERNAL_USE_MSVC -#if defined(__clang__) -#define GMOCK_PP_INTERNAL_USE_MSVC 0 -#elif defined(_MSC_VER) -// TODO(iserna): Also verify tradional versus comformant preprocessor. -static_assert( - _MSC_VER >= 1900, - "MSVC version not supported. There is support for MSVC 14.0 and above."); -#define GMOCK_PP_INTERNAL_USE_MSVC 1 -#else -#define GMOCK_PP_INTERNAL_USE_MSVC 0 -#endif - // Expands and concatenates the arguments. Constructed macros reevaluate. #define GMOCK_PP_CAT(_1, _2) GMOCK_PP_INTERNAL_CAT(_1, _2) @@ -29,10 +16,6 @@ static_assert( // Returns the only argument. #define GMOCK_PP_IDENTITY(_1) _1 -// MSVC preprocessor collapses __VA_ARGS__ in a single argument, we use a -// CAT-like directive to force correct evaluation. Each macro has its own. -#if GMOCK_PP_INTERNAL_USE_MSVC - // Evaluates to the number of arguments after expansion. // // #define PAIR x, y @@ -43,45 +26,27 @@ static_assert( // GMOCK_PP_NARG(PAIR) => 2 // // Requires: the number of arguments after expansion is at most 15. -#define GMOCK_PP_NARG(...) \ - GMOCK_PP_INTERNAL_NARG_CAT( \ - 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_HAS_COMMA_CAT( \ - 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_HEAD_CAT(GMOCK_PP_INTERNAL_HEAD(__VA_ARGS__), ) +#define GMOCK_PP_HEAD(...) 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_TAIL_CAT(GMOCK_PP_INTERNAL_TAIL(__VA_ARGS__), ) +#define GMOCK_PP_TAIL(...) 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_CAT( \ - GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__), ) - -#else // GMOCK_PP_INTERNAL_USE_MSVC - -#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_HAS_COMMA(...) \ - 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_HEAD(...) GMOCK_PP_INTERNAL_HEAD(__VA_ARGS__) -#define GMOCK_PP_TAIL(...) GMOCK_PP_INTERNAL_TAIL(__VA_ARGS__) -#define GMOCK_PP_VARIADIC_CALL(_Macro, ...) \ - GMOCK_PP_CAT(_Macro, GMOCK_PP_NARG(__VA_ARGS__))(__VA_ARGS__) - -#endif // GMOCK_PP_INTERNAL_USE_MSVC + 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`. @@ -139,10 +104,9 @@ static_assert( // Expands to 1 if the first argument starts with something in parentheses, // otherwise to 0. -#define GMOCK_PP_IS_BEGIN_PARENS(...) \ - GMOCK_PP_INTERNAL_ALTERNATE_HEAD( \ - GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_, \ - GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C __VA_ARGS__)) +#define GMOCK_PP_IS_BEGIN_PARENS(...) \ + GMOCK_PP_HEAD(GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_, \ + GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C __VA_ARGS__)) // Expands to 1 is there is only one argument and it is enclosed in parentheses. #define GMOCK_PP_IS_ENCLOSED_PARENS(...) \ @@ -179,10 +143,6 @@ static_assert( #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_, \ @@ -190,30 +150,24 @@ static_assert( #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__ -#if GMOCK_PP_INTERNAL_USE_MSVC -#define GMOCK_PP_INTERNAL_NARG_CAT(_1, _2) GMOCK_PP_INTERNAL_NARG_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_HEAD_CAT(_1, _2) GMOCK_PP_INTERNAL_HEAD_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_HAS_COMMA_CAT(_1, _2) \ - GMOCK_PP_INTERNAL_HAS_COMMA_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_TAIL_CAT(_1, _2) GMOCK_PP_INTERNAL_TAIL_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_VARIADIC_CALL_CAT(_1, _2) \ - GMOCK_PP_INTERNAL_VARIADIC_CALL_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_NARG_CAT_I(_1, _2) _1##_2 -#define GMOCK_PP_INTERNAL_HEAD_CAT_I(_1, _2) _1##_2 -#define GMOCK_PP_INTERNAL_HAS_COMMA_CAT_I(_1, _2) _1##_2 -#define GMOCK_PP_INTERNAL_TAIL_CAT_I(_1, _2) _1##_2 -#define GMOCK_PP_INTERNAL_VARIADIC_CALL_CAT_I(_1, _2) _1##_2 -#define GMOCK_PP_INTERNAL_ALTERNATE_HEAD(...) \ - GMOCK_PP_INTERNAL_ALTERNATE_HEAD_CAT(GMOCK_PP_HEAD(__VA_ARGS__), ) -#define GMOCK_PP_INTERNAL_ALTERNATE_HEAD_CAT(_1, _2) \ - GMOCK_PP_INTERNAL_ALTERNATE_HEAD_CAT_I(_1, _2) -#define GMOCK_PP_INTERNAL_ALTERNATE_HEAD_CAT_I(_1, _2) _1##_2 -#else // GMOCK_PP_INTERNAL_USE_MSVC -#define GMOCK_PP_INTERNAL_ALTERNATE_HEAD(...) GMOCK_PP_HEAD(__VA_ARGS__) -#endif // GMOCK_PP_INTERNAL_USE_MSVC +// 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, |