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Improve handling of named arguments

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This commit is contained in:
Victor Zverovich
2020-04-14 06:48:55 -07:00
parent a9d62d3f35
commit 8a4630686e
8 changed files with 112 additions and 121 deletions
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test/core-test.cc
-22
View File
@@ -456,28 +456,6 @@ TEST(FormatDynArgsTest, CustomFormat) {
EXPECT_EQ("cust=0 and cust=1 and cust=3", result);
}
TEST(FormatDynArgsTest, NamedArgByRef) {
fmt::dynamic_format_arg_store<fmt::format_context> store;
// Note: fmt::arg() constructs an object which holds a reference
// to its value. It's not an aggregate, so it doesn't extend the
// reference lifetime. As a result, it's a very bad idea passing temporary
// as a named argument value. Only GCC with optimization level >0
// complains about this.
//
// A real life usecase is when you have both name and value alive
// guarantee their lifetime and thus don't want them to be copied into
// storages.
int a1_val{42};
auto a1 = fmt::arg("a1_", a1_val);
store.push_back(std::cref(a1));
std::string result = fmt::vformat("{a1_}", // and {} and {}",
store);
EXPECT_EQ("42", result);
}
struct copy_throwable {
copy_throwable() {}
copy_throwable(const copy_throwable&) { throw "deal with it"; }
test/format-test.cc
+11 -11
View File
@@ -640,7 +640,7 @@ TEST(FormatterTest, ArgErrors) {
EXPECT_THROW_MSG(format("{"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{?}"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0"), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0}"), format_error, "argument index out of range");
EXPECT_THROW_MSG(format("{0}"), format_error, "argument not found");
EXPECT_THROW_MSG(format("{00}", 42), format_error, "invalid format string");
char format_str[BUFFER_SIZE];
@@ -648,7 +648,7 @@ TEST(FormatterTest, ArgErrors) {
EXPECT_THROW_MSG(format(format_str), format_error, "invalid format string");
safe_sprintf(format_str, "{%u}", INT_MAX);
EXPECT_THROW_MSG(format(format_str), format_error,
"argument index out of range");
"argument not found");
safe_sprintf(format_str, "{%u", INT_MAX + 1u);
EXPECT_THROW_MSG(format(format_str), format_error, "number is too big");
@@ -673,13 +673,13 @@ template <> struct TestFormat<0> {
TEST(FormatterTest, ManyArgs) {
EXPECT_EQ("19", TestFormat<20>::format("{19}"));
EXPECT_THROW_MSG(TestFormat<20>::format("{20}"), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(TestFormat<21>::format("{21}"), format_error,
"argument index out of range");
"argument not found");
enum { max_packed_args = fmt::internal::max_packed_args };
std::string format_str = fmt::format("{{{}}}", max_packed_args + 1);
EXPECT_THROW_MSG(TestFormat<max_packed_args>::format(format_str),
format_error, "argument index out of range");
format_error, "argument not found");
}
TEST(FormatterTest, NamedArg) {
@@ -708,7 +708,7 @@ TEST(FormatterTest, AutoArgIndex) {
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{:.{0}}", 1.2345, 2), format_error,
"cannot switch from automatic to manual argument indexing");
EXPECT_THROW_MSG(format("{}"), format_error, "argument index out of range");
EXPECT_THROW_MSG(format("{}"), format_error, "argument not found");
}
TEST(FormatterTest, EmptySpecs) { EXPECT_EQ("42", format("{0:}", 42)); }
@@ -1012,7 +1012,7 @@ TEST(FormatterTest, RuntimeWidth) {
"cannot switch from manual to automatic argument indexing");
EXPECT_THROW_MSG(format("{0:{?}}", 0), format_error, "invalid format string");
EXPECT_THROW_MSG(format("{0:{1}}", 0), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(format("{0:{0:}}", 0), format_error,
"invalid format string");
@@ -1161,7 +1161,7 @@ TEST(FormatterTest, RuntimePrecision) {
EXPECT_THROW_MSG(format("{0:.{1}", 0, 0), format_error,
"precision not allowed for this argument type");
EXPECT_THROW_MSG(format("{0:.{1}}", 0), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(format("{0:.{0:}}", 0), format_error,
"invalid format string");
@@ -2441,7 +2441,7 @@ TEST(FormatTest, FormatStringErrors) {
EXPECT_ERROR("{:{<}", "invalid fill character '{'", int);
EXPECT_ERROR("{:10000000000}", "number is too big", int);
EXPECT_ERROR("{:.10000000000}", "number is too big", int);
EXPECT_ERROR_NOARGS("{:x}", "argument index out of range");
EXPECT_ERROR_NOARGS("{:x}", "argument not found");
# if FMT_NUMERIC_ALIGN
EXPECT_ERROR("{0:=5", "unknown format specifier", int);
EXPECT_ERROR("{:=}", "format specifier requires numeric argument",
@@ -2482,8 +2482,8 @@ TEST(FormatTest, FormatStringErrors) {
EXPECT_ERROR("{:.{0x}}", "invalid format string", int);
EXPECT_ERROR("{:.{-}}", "invalid format string", int);
EXPECT_ERROR("{:.x}", "missing precision specifier", int);
EXPECT_ERROR_NOARGS("{}", "argument index out of range");
EXPECT_ERROR("{1}", "argument index out of range", int);
EXPECT_ERROR_NOARGS("{}", "argument not found");
EXPECT_ERROR("{1}", "argument not found", int);
EXPECT_ERROR("{1}{}",
"cannot switch from manual to automatic argument indexing", int,
int);
test/printf-test.cc
+6 -6
View File
@@ -113,14 +113,14 @@ TEST(PrintfTest, SwitchArgIndexing) {
TEST(PrintfTest, InvalidArgIndex) {
EXPECT_THROW_MSG(test_sprintf("%0$d", 42), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf("%2$d", 42), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf(format("%{}$d", INT_MAX), 42), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf("%2$", 42), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf(format("%{}$d", BIG_NUM), 42), format_error,
"number is too big");
}
@@ -223,7 +223,7 @@ TEST(PrintfTest, DynamicWidth) {
EXPECT_THROW_MSG(test_sprintf("%*d", 5.0, 42), format_error,
"width is not integer");
EXPECT_THROW_MSG(test_sprintf("%*d"), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf("%*d", BIG_NUM, 42), format_error,
"number is too big");
}
@@ -269,7 +269,7 @@ TEST(PrintfTest, DynamicPrecision) {
EXPECT_THROW_MSG(test_sprintf("%.*d", 5.0, 42), format_error,
"precision is not integer");
EXPECT_THROW_MSG(test_sprintf("%.*d"), format_error,
"argument index out of range");
"argument not found");
EXPECT_THROW_MSG(test_sprintf("%.*d", BIG_NUM, 42), format_error,
"number is too big");
if (sizeof(long long) != sizeof(int)) {