19 Diagnostics library [diagnostics]

19.2 Exception classes [std.exceptions]

19.2.3 Class logic_error [logic.error]

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namespace std { class logic_error : public exception { public: explicit logic_error(const string& what_arg); explicit logic_error(const char* what_arg); }; }
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The class logic_error defines the type of objects thrown as exceptions to report errors presumably detectable before the program executes, such as violations of logical preconditions or class invariants.
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logic_error(const string& what_arg);
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Postconditions: strcmp(what(), what_arg.c_str()) == 0.
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logic_error(const char* what_arg);
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Postconditions: strcmp(what(), what_arg) == 0.