Function operator[]

tests/TestConversions.cpp:47–50

TEST_RESULT("Auto ref to value conversion", testAutoRefToValue, "14");

const char	*testImplicitConversionOnReturn =
"class array{ int[10] arr; int size; }\r\n\
void array:push_back(auto ref a){ arr[size++] = int(a); }\r\n\
auto ref operator[](array ref arr, int index){ assert(index<arr.size); return &arr.arr[index]; }\r\n\
\r\n\
array a;\r\n\
a.push_back(1); a.push_back(5);\r\n\