我有以下两个变量:
static vector<map<uint32_t,vector<uint64_t>>> relations;
static map<uint64_t,map<uint32_t,vector<uint64_t>>> transactions;
uint64_t key1;
uint32_t key2;
uint32_t key3;
// init keys...
我试图复制一个vector从relations到transactions:
transactions[key1][key2].push_back(relations[key2][key3]));
但我发现这个错误:
main.cpp:175:26: error: no matching member function for call to 'push_back'
transactions[key1][key2].push_back(relations[key2][key3]));
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/vector:700:36: note: candidate function not viable: no
known conversion from 'vector<uint64_t>' to 'const value_type' (aka 'const unsigned long long') for 1st argument
_LIBCPP_INLINE_VISIBILITY void push_back(const_reference __x);
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/vector:702:36: note: candidate function not viable: no
known conversion from 'vector<uint64_t>' to 'value_type' (aka 'unsigned long …c++ ×1