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Warng about compilers mishandling negative NaN.

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This commit is contained in:
Victor Zverovich 2014-06-06 18:54:45 -07:00
parent acf94abffd
commit 1ed23b9127
1 changed files with 7 additions and 8 deletions
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13
test/format-test.cc
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@ -1229,18 +1229,17 @@ TEST(FormatterTest, FormatDouble) {
EXPECT_EQ("+0000392.6", str(Format("{0:+010.4g}") << 392.65)); EXPECT_EQ("+0000392.6", str(Format("{0:+010.4g}") << 392.65));
} }
TEST(FormatterTest, SignBit) {
#ifndef signbit
# define signbit std::signbit
#endif
EXPECT_EQ(1, signbit(-std::numeric_limits<double>::quiet_NaN()));
}
TEST(FormatterTest, FormatNaN) { TEST(FormatterTest, FormatNaN) {
double nan = std::numeric_limits<double>::quiet_NaN(); double nan = std::numeric_limits<double>::quiet_NaN();
EXPECT_EQ("nan", str(Format("{}") << nan)); EXPECT_EQ("nan", str(Format("{}") << nan));
EXPECT_EQ("+nan", str(Format("{:+}") << nan)); EXPECT_EQ("+nan", str(Format("{:+}") << nan));
#ifndef signbit
# define signbit std::signbit
#endif
if (signbit(-nan))
EXPECT_EQ("-nan", str(Format("{}") << -nan)); EXPECT_EQ("-nan", str(Format("{}") << -nan));
else
fmt::Print("Warning: compiler doesn't handle negative NaN correctly");
EXPECT_EQ(" nan", str(Format("{: }") << nan)); EXPECT_EQ(" nan", str(Format("{: }") << nan));
EXPECT_EQ("NAN", str(Format("{:F}") << nan)); EXPECT_EQ("NAN", str(Format("{:F}") << nan));
EXPECT_EQ("nan ", str(Format("{:<7}") << nan)); EXPECT_EQ("nan ", str(Format("{:<7}") << nan));