diff options
Diffstat (limited to 'third-party/unittest/googlemock/include/gmock/internal/gmock-pp.h')
| -rw-r--r-- | third-party/unittest/googlemock/include/gmock/internal/gmock-pp.h | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/third-party/unittest/googlemock/include/gmock/internal/gmock-pp.h b/third-party/unittest/googlemock/include/gmock/internal/gmock-pp.h new file mode 100644 index 000000000000..1ab80e1cdbee --- /dev/null +++ b/third-party/unittest/googlemock/include/gmock/internal/gmock-pp.h @@ -0,0 +1,317 @@ +#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) + +// Expands and stringifies the only argument. +#define GMOCK_PP_STRINGIZE(...) GMOCK_PP_INTERNAL_STRINGIZE(__VA_ARGS__) + +// Returns empty. Given a variadic number of arguments. +#define GMOCK_PP_EMPTY(...) + +// Returns a comma. Given a variadic number of arguments. +#define GMOCK_PP_COMMA(...) , + +// 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 +// +// GMOCK_PP_NARG() => 1 +// GMOCK_PP_NARG(x) => 1 +// GMOCK_PP_NARG(x, y) => 2 +// 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), ) + +// 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), ) +// Returns the first argument. +#define GMOCK_PP_HEAD(...) \ + GMOCK_PP_INTERNAL_HEAD_CAT(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__), ) + +// 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 + +// If the arguments after expansion have no tokens, evaluates to `1`. Otherwise +// evaluates to `0`. +// +// Requires: * the number of arguments after expansion is at most 15. +// * If the argument is a macro, it must be able to be called with one +// argument. +// +// Implementation details: +// +// There is one case when it generates a compile error: if the argument is macro +// that cannot be called with one argument. +// +// #define M(a, b) // it doesn't matter what it expands to +// +// // Expected: expands to `0`. +// // Actual: compile error. +// GMOCK_PP_IS_EMPTY(M) +// +// There are 4 cases tested: +// +// * __VA_ARGS__ possible expansion has no unparen'd commas. Expected 0. +// * __VA_ARGS__ possible expansion is not enclosed in parenthesis. Expected 0. +// * __VA_ARGS__ possible expansion is not a macro that ()-evaluates to a comma. +// Expected 0 +// * __VA_ARGS__ is empty, or has unparen'd commas, or is enclosed in +// parenthesis, or is a macro that ()-evaluates to comma. Expected 1. +// +// We trigger detection on '0001', i.e. on empty. +#define GMOCK_PP_IS_EMPTY(...) \ + GMOCK_PP_INTERNAL_IS_EMPTY(GMOCK_PP_HAS_COMMA(__VA_ARGS__), \ + GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__), \ + GMOCK_PP_HAS_COMMA(__VA_ARGS__()), \ + GMOCK_PP_HAS_COMMA(GMOCK_PP_COMMA __VA_ARGS__())) + +// Evaluates to _Then if _Cond is 1 and _Else if _Cond is 0. +#define GMOCK_PP_IF(_Cond, _Then, _Else) \ + GMOCK_PP_CAT(GMOCK_PP_INTERNAL_IF_, _Cond)(_Then, _Else) + +// Evaluates to the number of arguments after expansion. Identifies 'empty' as +// 0. +// +// #define PAIR x, y +// +// GMOCK_PP_NARG0() => 0 +// GMOCK_PP_NARG0(x) => 1 +// GMOCK_PP_NARG0(x, y) => 2 +// GMOCK_PP_NARG0(PAIR) => 2 +// +// Requires: * the number of arguments after expansion is at most 15. +// * If the argument is a macro, it must be able to be called with one +// argument. +#define GMOCK_PP_NARG0(...) \ + GMOCK_PP_IF(GMOCK_PP_IS_EMPTY(__VA_ARGS__), 0, GMOCK_PP_NARG(__VA_ARGS__)) + +// 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__)) + +// Expands to 1 is there is only one argument and it is enclosed in parentheses. +#define GMOCK_PP_IS_ENCLOSED_PARENS(...) \ + GMOCK_PP_IF(GMOCK_PP_IS_BEGIN_PARENS(__VA_ARGS__), \ + GMOCK_PP_IS_EMPTY(GMOCK_PP_EMPTY __VA_ARGS__), 0) + +// Remove the parens, requires GMOCK_PP_IS_ENCLOSED_PARENS(args) => 1. +#define GMOCK_PP_REMOVE_PARENS(...) GMOCK_PP_INTERNAL_REMOVE_PARENS __VA_ARGS__ + +// Expands to _Macro(0, _Data, e1) _Macro(1, _Data, e2) ... _Macro(K -1, _Data, +// eK) as many of GMOCK_INTERNAL_NARG0 _Tuple. +// Requires: * |_Macro| can be called with 3 arguments. +// * |_Tuple| expansion has no more than 15 elements. +#define GMOCK_PP_FOR_EACH(_Macro, _Data, _Tuple) \ + GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, GMOCK_PP_NARG0 _Tuple) \ + (0, _Macro, _Data, _Tuple) + +// Expands to _Macro(0, _Data, ) _Macro(1, _Data, ) ... _Macro(K - 1, _Data, ) +// Empty if _K = 0. +// Requires: * |_Macro| can be called with 3 arguments. +// * |_K| literal between 0 and 15 +#define GMOCK_PP_REPEAT(_Macro, _Data, _N) \ + GMOCK_PP_CAT(GMOCK_PP_INTERNAL_FOR_EACH_IMPL_, _N) \ + (0, _Macro, _Data, GMOCK_PP_INTENRAL_EMPTY_TUPLE) + +// Increments the argument, requires the argument to be between 0 and 15. +#define GMOCK_PP_INC(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_INC_, _i) + +// Returns comma if _i != 0. Requires _i to be between 0 and 15. +#define GMOCK_PP_COMMA_IF(_i) GMOCK_PP_CAT(GMOCK_PP_INTERNAL_COMMA_IF_, _i) + +// Internal details follow. Do not use any of these symbols outside of this +// file or we will break your code. +#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_, \ + _1, _2, _3, _4)) +#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 + +#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C(...) 1 _ +#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_1 1, +#define GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_R_GMOCK_PP_INTERNAL_IBP_IS_VARIADIC_C \ + 0, +#define GMOCK_PP_INTERNAL_REMOVE_PARENS(...) __VA_ARGS__ +#define GMOCK_PP_INTERNAL_INC_0 1 +#define GMOCK_PP_INTERNAL_INC_1 2 +#define GMOCK_PP_INTERNAL_INC_2 3 +#define GMOCK_PP_INTERNAL_INC_3 4 +#define GMOCK_PP_INTERNAL_INC_4 5 +#define GMOCK_PP_INTERNAL_INC_5 6 +#define GMOCK_PP_INTERNAL_INC_6 7 +#define GMOCK_PP_INTERNAL_INC_7 8 +#define GMOCK_PP_INTERNAL_INC_8 9 +#define GMOCK_PP_INTERNAL_INC_9 10 +#define GMOCK_PP_INTERNAL_INC_10 11 +#define GMOCK_PP_INTERNAL_INC_11 12 +#define GMOCK_PP_INTERNAL_INC_12 13 +#define GMOCK_PP_INTERNAL_INC_13 14 +#define GMOCK_PP_INTERNAL_INC_14 15 +#define GMOCK_PP_INTERNAL_INC_15 16 +#define GMOCK_PP_INTERNAL_COMMA_IF_0 +#define GMOCK_PP_INTERNAL_COMMA_IF_1 , +#define GMOCK_PP_INTERNAL_COMMA_IF_2 , +#define GMOCK_PP_INTERNAL_COMMA_IF_3 , +#define GMOCK_PP_INTERNAL_COMMA_IF_4 , +#define GMOCK_PP_INTERNAL_COMMA_IF_5 , +#define GMOCK_PP_INTERNAL_COMMA_IF_6 , +#define GMOCK_PP_INTERNAL_COMMA_IF_7 , +#define GMOCK_PP_INTERNAL_COMMA_IF_8 , +#define GMOCK_PP_INTERNAL_COMMA_IF_9 , +#define GMOCK_PP_INTERNAL_COMMA_IF_10 , +#define GMOCK_PP_INTERNAL_COMMA_IF_11 , +#define GMOCK_PP_INTERNAL_COMMA_IF_12 , +#define GMOCK_PP_INTERNAL_COMMA_IF_13 , +#define GMOCK_PP_INTERNAL_COMMA_IF_14 , +#define GMOCK_PP_INTERNAL_COMMA_IF_15 , +#define GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, _element) \ + _Macro(_i, _Data, _element) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_0(_i, _Macro, _Data, _Tuple) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_1(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_2(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_3(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_4(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_5(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_6(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_7(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_8(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_9(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_10(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_11(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_12(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_13(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) +#define GMOCK_PP_INTERNAL_FOR_EACH_IMPL_15(_i, _Macro, _Data, _Tuple) \ + GMOCK_PP_INTERNAL_CALL_MACRO(_Macro, _i, _Data, GMOCK_PP_HEAD _Tuple) \ + GMOCK_PP_INTERNAL_FOR_EACH_IMPL_14(GMOCK_PP_INC(_i), _Macro, _Data, \ + (GMOCK_PP_TAIL _Tuple)) + +#endif // THIRD_PARTY_GOOGLETEST_GOOGLEMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_PP_H_ |