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Fix compile-time parsing and add more tests

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This commit is contained in:
Victor Zverovich 2017-11-11 11:22:09 -08:00
parent 5b95b5d77c
commit 686ff942af
2 changed files with 12 additions and 5 deletions
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15
include/fmt/format.h
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@ -841,7 +841,7 @@ class null_terminating_iterator {
return ptr_ - other.ptr_;
}
bool operator!=(null_terminating_iterator other) const {
constexpr bool operator!=(null_terminating_iterator other) const {
return ptr_ != other.ptr_;
}
@ -2570,10 +2570,13 @@ constexpr void parse_format_string(Iterator it, Handler &&handler) {
} else if (*it == ':') {
++it;
it = handler.on_format_specs(it);
if (*it != '}')
if (*it != '}') {
handler.on_error("unknown format specifier");
return;
}
} else {
handler.on_error("missing '}' in format string");
return;
}
start = ++it;
@ -2591,7 +2594,7 @@ template <typename Char, typename ErrorHandler, typename... Args>
class format_string_checker : public ErrorHandler {
public:
explicit constexpr format_string_checker(ErrorHandler eh, const Char *end)
: ErrorHandler(std::move(eh)), end_(end) {}
: ErrorHandler(eh), end_(end) {}
constexpr void on_text(const Char *, const Char *) {}
@ -2613,8 +2616,10 @@ class format_string_checker : public ErrorHandler {
}
private:
constexpr static size_t NUM_ARGS = sizeof...(Args);
constexpr void check_arg_index() {
if (arg_index_ < 0 || arg_index_ >= sizeof...(Args))
if (arg_index_ < 0 || arg_index_ >= NUM_ARGS)
this->on_error("argument index out of range");
}
@ -2623,7 +2628,7 @@ class format_string_checker : public ErrorHandler {
const Char *end_;
int arg_index_ = -1;
parse_func parse_funcs_[sizeof...(Args)] = {
parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1] = {
&parse_format_specs<Char, Args>...
};
};

2
test/format-test.cc
View File

@ -1858,4 +1858,6 @@ TEST(FormatTest, FormatStringErrors) {
EXPECT_ERROR("foo", nullptr);
EXPECT_ERROR("}", "unmatched '}' in format string");
EXPECT_ERROR("{0:s", "unknown format specifier", Date);
EXPECT_ERROR("{0:=5", "unknown format specifier", char);
EXPECT_ERROR("{foo", "missing '}' in format string", int);
}