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Improve error reporting (#357)

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This commit is contained in:
Victor Zverovich 2016-08-14 07:28:20 -07:00
parent 2bf59a97c6
commit f19d8f9655
6 changed files with 46 additions and 34 deletions
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45
fmt/format.h
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@ -1115,13 +1115,16 @@ template<class T, class F>
struct Conditional<false, T, F> { typedef F type; };
// For bcc32 which doesn't understand ! in template arguments.
template<bool>
template <bool>
struct Not { enum { value = 0 }; };
template<>
template <>
struct Not<false> { enum { value = 1 }; };
template<typename T, T> struct LConvCheck {
template <typename T>
struct False { enum { value = 0 }; };
template <typename T, T> struct LConvCheck {
LConvCheck(int) {}
};
@ -1136,6 +1139,35 @@ inline StringRef thousands_sep(
inline fmt::StringRef thousands_sep(...) { return ""; }
#define FMT_CONCAT(a, b) a##b
#if FMT_GCC_VERSION >= 407
# define FMT_UNUSED __attribute__((unused))
#else
# define FMT_UNUSED
#endif
#ifndef FMT_USE_STATIC_ASSERT
# define FMT_USE_STATIC_ASSERT 0
#endif
#if FMT_USE_STATIC_ASSERT || FMT_HAS_FEATURE(cxx_static_assert) || \
(FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || _MSC_VER >= 1600
# define FMT_STATIC_ASSERT(cond, message) static_assert(cond, message)
#else
# define FMT_CONCAT_(a, b) FMT_CONCAT(a, b)
# define FMT_STATIC_ASSERT(cond, message) \
typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED
#endif
template <typename Formatter, typename Char, typename T>
void format_arg(Formatter &, const Char *, const T &) {
FMT_STATIC_ASSERT(False<T>::value,
"Cannot format argument. To enable the use of ostream "
"operator<< include fmt/ostream.h. Otherwise provide "
"an overload of format_arg.");
}
// Makes an Arg object from any type.
template <typename Formatter>
class MakeValue : public Arg {
@ -1179,9 +1211,9 @@ class MakeValue : public Arg {
template <typename T>
static void format_custom_arg(
void *formatter, const void *arg, void *format_str_ptr) {
format(*static_cast<Formatter*>(formatter),
*static_cast<const Char**>(format_str_ptr),
*static_cast<const T*>(arg));
format_arg(*static_cast<Formatter*>(formatter),
*static_cast<const Char**>(format_str_ptr),
*static_cast<const T*>(arg));
}
public:
@ -3323,7 +3355,6 @@ void arg(WStringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED;
#define FMT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
#define FMT_RSEQ_N() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
#define FMT_CONCAT(a, b) a##b
#define FMT_FOR_EACH_(N, f, ...) \
FMT_EXPAND(FMT_CONCAT(FMT_FOR_EACH, N)(f, __VA_ARGS__))
#define FMT_FOR_EACH(f, ...) \

4
fmt/ostream.h
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@ -73,8 +73,8 @@ void write(std::ostream &os, Writer &w);
// Formats a value.
template <typename Char, typename ArgFormatter, typename T>
void format(BasicFormatter<Char, ArgFormatter> &f,
const Char *&format_str, const T &value) {
void format_arg(BasicFormatter<Char, ArgFormatter> &f,
const Char *&format_str, const T &value) {
internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
internal::FormatBuf<Char> format_buf(buffer);

19
fmt/posix.h
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@ -51,25 +51,6 @@
# endif
#endif
#if FMT_GCC_VERSION >= 407
# define FMT_UNUSED __attribute__((unused))
#else
# define FMT_UNUSED
#endif
#ifndef FMT_USE_STATIC_ASSERT
# define FMT_USE_STATIC_ASSERT 0
#endif
#if FMT_USE_STATIC_ASSERT || FMT_HAS_FEATURE(cxx_static_assert) || \
(FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || _MSC_VER >= 1600
# define FMT_STATIC_ASSERT(cond, message) static_assert(cond, message)
#else
# define FMT_CONCAT_(a, b) FMT_CONCAT(a, b)
# define FMT_STATIC_ASSERT(cond, message) \
typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED
#endif
// Retries the expression while it evaluates to error_result and errno
// equals to EINTR.
#ifndef _WIN32

4
fmt/time.h
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@ -15,8 +15,8 @@
namespace fmt {
template <typename ArgFormatter>
void format(BasicFormatter<char, ArgFormatter> &f,
const char *&format_str, const std::tm &tm) {
void format_arg(BasicFormatter<char, ArgFormatter> &f,
const char *&format_str, const std::tm &tm) {
if (*format_str == ':')
++format_str;
const char *end = format_str;

4
test/format-test.cc
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@ -1366,7 +1366,7 @@ TEST(FormatterTest, FormatCStringRef) {
EXPECT_EQ("test", format("{0}", CStringRef("test")));
}
void format(fmt::BasicFormatter<char> &f, const char *, const Date &d) {
void format_arg(fmt::BasicFormatter<char> &f, const char *, const Date &d) {
f.writer() << d.year() << '-' << d.month() << '-' << d.day();
}
@ -1379,7 +1379,7 @@ TEST(FormatterTest, FormatCustom) {
class Answer {};
template <typename Char>
void format(fmt::BasicFormatter<Char> &f, const Char *, Answer) {
void format_arg(fmt::BasicFormatter<Char> &f, const Char *, Answer) {
f.writer() << "42";
}

4
test/util-test.cc
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@ -64,7 +64,7 @@ namespace {
struct Test {};
template <typename Char>
void format(fmt::BasicFormatter<Char> &f, const Char *, Test) {
void format_arg(fmt::BasicFormatter<Char> &f, const Char *, Test) {
f.writer() << "test";
}
@ -581,7 +581,7 @@ struct CustomFormatter {
typedef char Char;
};
void format(CustomFormatter &, const char *&s, const Test &) {
void format_arg(CustomFormatter &, const char *&s, const Test &) {
s = "custom_format";
}