Why const can disappear at QMap::value(...)

[yeye_olive]

Even after 25+ years of C++ coding, this is one aspect that continues to confuse me. And then there are the versions with two const declarations "const MyObject const *" or whatever. Thank god for google.

C/C++ is quite liberal with the placement of the "const" qualifier in a declarator. IMHO it is a shame that the ambiguous form "const T *" be so prevalent. I tend to consistently place "const" after the type it qualifies, like * and &, which eliminates the ambiguous forms. All I have to do is read the declaration from right to left:
T const: constant T
T const *: pointer to constant T
T * const: constant pointer to T
T const * const: constant pointer to constant T

If you ever are in doubt about a declaration, check out the excellent cdecl.org.