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Annotate fmt::format and fmt::formatted_size as [[nodiscard]]

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This prevents accidentally writing fmt::format when fmt::print was
intended. Other than running tests, there's not a good use case for
discarding the formatted output.
This commit is contained in:
Florin Iucha
2021-11-25 07:30:30 -08:00
committed by Victor Zverovich
parent 5abe9e8266
commit 491ba2dda5
7 changed files with 196 additions and 185 deletions
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test/ostream-test.cc
+5 -5
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@@ -70,15 +70,15 @@ TEST(ostream_test, format_specs) {
EXPECT_EQ(" def", fmt::format("{0:>5}", test_string("def")));
EXPECT_EQ(" def ", fmt::format("{0:^5}", test_string("def")));
EXPECT_EQ("def**", fmt::format("{0:*<5}", test_string("def")));
EXPECT_THROW_MSG(fmt::format(runtime("{0:+}"), test_string()), format_error,
EXPECT_THROW_MSG((void)fmt::format(runtime("{0:+}"), test_string()), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(fmt::format(runtime("{0:-}"), test_string()), format_error,
EXPECT_THROW_MSG((void)fmt::format(runtime("{0:-}"), test_string()), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(fmt::format(runtime("{0: }"), test_string()), format_error,
EXPECT_THROW_MSG((void)fmt::format(runtime("{0: }"), test_string()), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(fmt::format(runtime("{0:#}"), test_string()), format_error,
EXPECT_THROW_MSG((void)fmt::format(runtime("{0:#}"), test_string()), format_error,
"format specifier requires numeric argument");
EXPECT_THROW_MSG(fmt::format(runtime("{0:05}"), test_string()), format_error,
EXPECT_THROW_MSG((void)fmt::format(runtime("{0:05}"), test_string()), format_error,
"format specifier requires numeric argument");
EXPECT_EQ("test ", fmt::format("{0:13}", test_string("test")));
EXPECT_EQ("test ", fmt::format("{0:{1}}", test_string("test"), 13));