22 General utilities library [utilities]

22.14 Formatting [format]

22.14.10 Class format_error [format.error]

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namespace std { class format_error : public runtime_error { public: explicit format_error(const string& what_arg); explicit format_error(const char* what_arg); }; }
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The class format_error defines the type of objects thrown as exceptions to report errors from the formatting library.
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format_error(const string& what_arg);
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Postconditions: strcmp(what(), what_arg.c_str()) == 0.
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format_error(const char* what_arg);
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Postconditions: strcmp(what(), what_arg) == 0.