@related: CPlusPlus debug gxx gcc
: error: assignment of read-only location '
http://stackoverflow.com/questions/1760080/error-assignment-of-read-only-location-in-unordered-map-c
: error: expected constructor, destructor, or type conversion before '
: error: no matching function for call to (...) note: candidates are:
: error: template-id ' ' for ' ' does not match any template declaration