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pretending to be const

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This commit is contained in:
Ben Burdette 2020-05-07 16:43:36 -06:00
parent e3901638b5
commit 1b801cec40
3 changed files with 23 additions and 7 deletions
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12
src/libutil/error.hh
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@ -82,10 +82,10 @@ class BaseError : public std::exception
{
protected:
string prefix_; // used for location traces etc.
ErrorInfo err;
mutable ErrorInfo err;
std::optional<string> what_;
const string& calcWhat()
mutable std::optional<string> what_;
const string& calcWhat() const
{
if (what_.has_value())
return *what_;
@ -131,12 +131,12 @@ public:
#ifdef EXCEPTION_NEEDS_THROW_SPEC
~BaseError() throw () { };
const char * what() throw () { return calcWhat().c_str(); }
const char * what() const throw () { return calcWhat().c_str(); }
#else
const char * what() noexcept { return calcWhat().c_str(); }
const char * what() const noexcept override { return calcWhat().c_str(); }
#endif
const string & msg() { return calcWhat(); }
const string & msg() const { return calcWhat(); }
const string & prefix() const { return prefix_; }
BaseError & addPrefix(const FormatOrString & fs);