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HandleArgIndex -> handle_arg_index. Use error_ instead of a local.

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This commit is contained in:
Victor Zverovich 2014-07-16 08:49:23 -07:00
parent f86c812e1a
commit f1dfd59a41
2 changed files with 27 additions and 33 deletions
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56
format.cc
View File

@ -681,10 +681,9 @@ inline const Arg
"cannot switch from automatic to manual argument indexing");
}
next_arg_index_ = -1;
const char *error = 0;
arg_index = ParseNonnegativeInt(s, error);
if (error)
report_error_(s, error); // TODO
arg_index = ParseNonnegativeInt(s, error_);
if (error_)
report_error_(s, error_); // TODO: don't use report_error_
if (arg_index >= args_.size())
report_error_(s, "argument index is out of range in format");
return args_[arg_index];
@ -719,25 +718,21 @@ const Arg &fmt::internal::FormatterBase::next_arg() {
return DUMMY_ARG;
}
const Arg &fmt::internal::FormatterBase::HandleArgIndex(
unsigned arg_index, const char *&error) {
const Arg &fmt::internal::FormatterBase::handle_arg_index(unsigned arg_index) {
if (arg_index != UINT_MAX) {
if (next_arg_index_ <= 0) {
next_arg_index_ = -1;
--arg_index;
} else if (!error) {
error = "cannot switch from automatic to manual argument indexing";
} else if (!error_) {
error_ = "cannot switch from automatic to manual argument indexing";
}
} else if (next_arg_index_ >= 0) {
arg_index = next_arg_index_++;
} else if (!error) {
error = "cannot switch from manual to automatic argument indexing";
if (arg_index < args_.size())
return args_[arg_index];
if (!error_)
error_ = "argument index is out of range in format";
return DUMMY_ARG;
}
if (arg_index < args_.size())
return args_[arg_index];
if (!error)
error = "argument index is out of range in format";
return DUMMY_ARG;
return next_arg();
}
template <typename Char>
@ -769,13 +764,13 @@ void fmt::internal::PrintfFormatter<Char>::ParseFlags(
template <typename Char>
unsigned fmt::internal::PrintfFormatter<Char>::ParseHeader(
const Char *&s, FormatSpec &spec, const char *&error) {
const Char *&s, FormatSpec &spec) {
unsigned arg_index = UINT_MAX;
Char c = *s;
if (c >= '0' && c <= '9') {
// Parse an argument index (if followed by '$') or a width possibly
// preceded with '0' flag(s).
unsigned value = ParseNonnegativeInt(s, error);
unsigned value = ParseNonnegativeInt(s, error_);
if (*s == '$') { // value is an argument index
++s;
arg_index = value;
@ -793,10 +788,10 @@ unsigned fmt::internal::PrintfFormatter<Char>::ParseHeader(
ParseFlags(spec, s);
// Parse width.
if (*s >= '0' && *s <= '9') {
spec.width_ = ParseNonnegativeInt(s, error);
spec.width_ = ParseNonnegativeInt(s, error_);
} else if (*s == '*') {
++s;
spec.width_ = WidthHandler(spec).visit(HandleArgIndex(UINT_MAX, error));
spec.width_ = WidthHandler(spec).visit(handle_arg_index(UINT_MAX));
}
return arg_index;
}
@ -826,33 +821,32 @@ void fmt::internal::PrintfFormatter<Char>::Format(
// completely parsed. This is done to avoid potentially confusing
// error messages for incomplete format strings. For example, in
// sprintf("%2$", 42);
// the format specification is incomplete. In naive approach we
// the format specification is incomplete. In a naive approach we
// would parse 2 as an argument index and report an error that the
// index is out of range which would be rather confusing if the
// use meant "%2d$" rather than "%2$d". If we delay an error, the
// user will get an error that the format string is invalid which
// is OK for both cases.
const char *error = 0;
// Parse argument index, flags and width.
unsigned arg_index = ParseHeader(s, spec, error);
unsigned arg_index = ParseHeader(s, spec);
// Parse precision.
if (*s == '.') {
++s;
if ('0' <= *s && *s <= '9') {
spec.precision_ = ParseNonnegativeInt(s, error);
spec.precision_ = ParseNonnegativeInt(s, error_);
} else if (*s == '*') {
++s;
const Arg &arg = HandleArgIndex(UINT_MAX, error);
const Arg &arg = handle_arg_index(UINT_MAX);
if (arg.type <= Arg::LAST_INTEGER_TYPE)
spec.precision_ = static_cast<int>(GetIntValue(arg)); // TODO: check for overflow
else if (!error)
error = "precision is not integer";
else if (!error_)
error_ = "precision is not integer";
}
}
const Arg &arg = HandleArgIndex(arg_index, error);
const Arg &arg = handle_arg_index(arg_index);
if (spec.hash_flag() && GetIntValue(arg) == 0)
spec.flags_ &= ~HASH_FLAG;
if (spec.fill_ == '0') {
@ -879,8 +873,8 @@ void fmt::internal::PrintfFormatter<Char>::Format(
// Parse type.
if (!*s)
throw FormatError("invalid format string");
if (error)
throw FormatError(error);
if (error_)
throw FormatError(error_);
spec.type_ = static_cast<char>(*s++);
start = s;

4
format.h
View File

@ -851,7 +851,7 @@ protected:
const Arg &next_arg();
const Arg &HandleArgIndex(unsigned arg_index, const char *&error);
const Arg &handle_arg_index(unsigned arg_index);
// TODO
};
@ -864,7 +864,7 @@ class PrintfFormatter : private FormatterBase {
// Parses argument index, flags and width and returns the parsed
// argument index.
unsigned ParseHeader(const Char *&s, FormatSpec &spec, const char *&error);
unsigned ParseHeader(const Char *&s, FormatSpec &spec);
public:
void Format(BasicWriter<Char> &writer,