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Here are the requirements for operater[] of std::map and std::unordered_map from the C++11 standard: mapped_type& operator[](const key_type& k); mapped_type& operator[](key_type&& k); Requires: mapp…
Created on 1/14/2013 (updated 17 weeks ago) | 0 validations | 0 workarounds | 4 comments | feedback id: 776500  | 
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struct A {}; A f() { return A() }; int main() { A& a = func(); } This compiles, when it shouldn't. Non-const l-value references must bind to lvalues. The value category of a function call is a…
Created on 1/4/2013 (updated 35 weeks ago) | 3 validations | 0 workarounds | 7 comments | feedback id: 775818  | 
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Edit: All containers are affected. See table 99 in section 23.2.1 of ISO 14882:2011: Allocator-aware container requirement. Given a container type X, and a r-value of type X, the expression X u(rv) h…
Created on 1/3/2013 (updated 17 weeks ago) | 0 validations | 0 workarounds | 3 comments | feedback id: 775715  | 
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