[libc] Move struct Sign into LIBC_NAMESPACE (#110709)

The struct Sign should be in the correct namespace. Also update the
various tests that use it.

Author: michaelrj-google

libc/src/__support/sign.h

@@ -11,6 +11,8 @@
 
 #include "src/__support/macros/attributes.h" // LIBC_INLINE, LIBC_INLINE_VAR
 
+namespace LIBC_NAMESPACE_DECL {
+
 // A type to interact with signed arithmetic types.
 struct Sign {
   LIBC_INLINE constexpr bool is_pos() const { return !is_negative; }
@@ -37,4 +39,5 @@ struct Sign {
 LIBC_INLINE_VAR constexpr Sign Sign::NEG = Sign(true);
 LIBC_INLINE_VAR constexpr Sign Sign::POS = Sign(false);
 
+} // namespace LIBC_NAMESPACE_DECL
 #endif // LLVM_LIBC_SRC___SUPPORT_SIGN_H

libc/test/UnitTest/FPMatcher.h

@@ -21,6 +21,8 @@
 
 #include "hdr/math_macros.h"
 
+using LIBC_NAMESPACE::Sign;
+
 namespace LIBC_NAMESPACE_DECL {
 namespace testing {
 

libc/test/src/__support/FPUtil/dyadic_float_test.cpp

@@ -16,6 +16,7 @@
 using Float128 = LIBC_NAMESPACE::fputil::DyadicFloat<128>;
 using Float192 = LIBC_NAMESPACE::fputil::DyadicFloat<192>;
 using Float256 = LIBC_NAMESPACE::fputil::DyadicFloat<256>;
+using LIBC_NAMESPACE::Sign;
 
 TEST(LlvmLibcDyadicFloatTest, BasicConversions) {
   Float128 x(Sign::POS, /*exponent*/ 0,

libc/test/src/__support/FPUtil/fpbits_test.cpp

@@ -13,6 +13,7 @@
 #include "src/__support/sign.h" // Sign
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
 using LIBC_NAMESPACE::fputil::FPBits;
 using LIBC_NAMESPACE::fputil::FPType;
 using LIBC_NAMESPACE::fputil::internal::FPRep;

libc/test/src/math/FDimTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class FDimTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 public:

libc/test/src/math/HypotTest.h

@@ -17,6 +17,8 @@
 
 #include "hdr/math_macros.h"
 
+using LIBC_NAMESPACE::Sign;
+
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
 
 template <typename T>

libc/test/src/math/ILogbTest.h

@@ -16,6 +16,8 @@
 #include "test/UnitTest/FEnvSafeTest.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 class LlvmLibcILogbTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 public:
   template <typename T> struct ILogbFunc {

libc/test/src/math/LdExpTest.h

@@ -19,6 +19,8 @@
 #include "hdr/math_macros.h"
 #include <stdint.h>
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class LdExpTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
   using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;

libc/test/src/math/NextAfterTest.h

@@ -18,6 +18,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class NextAfterTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
   using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;

libc/test/src/math/RIntTest.h

@@ -21,6 +21,7 @@
 #include "hdr/math_macros.h"
 
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+using LIBC_NAMESPACE::Sign;
 
 static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
                                           FE_TONEAREST};

libc/test/src/math/RemQuoTest.h

@@ -18,6 +18,7 @@
 #include "utils/MPFRWrapper/MPFRUtils.h"
 
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+using LIBC_NAMESPACE::Sign;
 
 template <typename T>
 class RemQuoTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {

libc/test/src/math/RoundToIntegerTest.h

@@ -22,6 +22,7 @@
 #include <errno.h>
 
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
+using LIBC_NAMESPACE::Sign;
 
 static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
                                           FE_TONEAREST};

libc/test/src/math/atanhf_test.cpp

@@ -18,6 +18,7 @@
 #include <stdint.h>
 
 using LlvmLibcAtanhfTest = LIBC_NAMESPACE::testing::FPTest<float>;
+using LIBC_NAMESPACE::Sign;
 
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
 

libc/test/src/math/smoke/AddTest.h

@@ -17,6 +17,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename OutType, typename InType>
 class AddTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/DivTest.h

@@ -16,6 +16,8 @@
 #include "test/UnitTest/RoundingModeUtils.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename OutType, typename InType>
 class DivTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/FDimTest.h

@@ -12,6 +12,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class FDimTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 public:

libc/test/src/math/smoke/GetPayloadTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class GetPayloadTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/ILogbTest.h

@@ -15,6 +15,8 @@
 #include "test/UnitTest/FEnvSafeTest.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename OutType, typename InType>
 class LlvmLibcILogbTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
   using FPBits = LIBC_NAMESPACE::fputil::FPBits<InType>;

libc/test/src/math/smoke/LdExpTest.h

@@ -18,6 +18,8 @@
 
 #include <stdint.h>
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T, typename U = int>
 class LdExpTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
   using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;

libc/test/src/math/smoke/MulTest.h

@@ -16,6 +16,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename OutType, typename InType>
 class MulTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/NearbyIntTest.h

@@ -15,6 +15,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
                                           FE_TONEAREST};
 

libc/test/src/math/smoke/NextAfterTest.h

@@ -18,6 +18,8 @@
 
 #include "hdr/fenv_macros.h"
 
+using LIBC_NAMESPACE::Sign;
+
 // TODO: Strengthen errno,exception checks and remove these assert macros
 // after new matchers/test fixtures are added
 #define ASSERT_FP_EQ_WITH_EXCEPTION(result, expected, expected_exception)      \

libc/test/src/math/smoke/NextTowardTest.h

@@ -18,6 +18,8 @@
 
 #include "hdr/fenv_macros.h"
 
+using LIBC_NAMESPACE::Sign;
+
 // TODO: Strengthen errno,exception checks and remove these assert macros
 // after new matchers/test fixtures are added
 #define ASSERT_FP_EQ_WITH_EXCEPTION(result, expected, expected_exception)      \

libc/test/src/math/smoke/RIntTest.h

@@ -18,6 +18,8 @@
 #include "hdr/fenv_macros.h"
 #include "hdr/math_macros.h"
 
+using LIBC_NAMESPACE::Sign;
+
 static constexpr int ROUNDING_MODES[4] = {FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO,
                                           FE_TONEAREST};
 

libc/test/src/math/smoke/RemQuoTest.h

@@ -14,6 +14,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class RemQuoTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
   using FPBits = LIBC_NAMESPACE::fputil::FPBits<T>;

libc/test/src/math/smoke/SetPayloadSigTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class SetPayloadSigTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/SetPayloadTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class SetPayloadTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/SubTest.h

@@ -16,6 +16,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename OutType, typename InType>
 class SubTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/TotalOrderMagTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class TotalOrderMagTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/TotalOrderTest.h

@@ -13,6 +13,8 @@
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
 
+using LIBC_NAMESPACE::Sign;
+
 template <typename T>
 class TotalOrderTestTemplate : public LIBC_NAMESPACE::testing::FEnvSafeTest {
 

libc/test/src/math/smoke/atanhf_test.cpp

@@ -16,6 +16,8 @@
 #include <errno.h>
 #include <stdint.h>
 
+using LIBC_NAMESPACE::Sign;
+
 using LlvmLibcAtanhfTest = LIBC_NAMESPACE::testing::FPTest<float>;
 
 TEST_F(LlvmLibcAtanhfTest, SpecialNumbers) {