Compiler switch to disable const_cast semantics in c-style casts?
Recently I stumbled over code such as this:
void foo(const Bar* b) {
...
takes_nonconst_param_fn((Bar*)b);
...
Obviously, the developer didn't know what he was doing, but if the compiler hadn't silently accepted the c-style-cast and at least required a proper const_cast
, he may have though twice before committing t开发者_运维百科his.
So this got me thinking, do any modern compilers have a switch to prevent const_cast
semantics for c-style-casts?
It's simply not practical to prevent all occurrences of c-style-casts and it's a necessary evil to allow their static_
and reinterpret_
semantics (if only for some library code), but my impression is, that legitimate usage of c-style-casts to cast away constness is very rare in C++ code bases, so maybe it should be possible to disable it altogether?
GCC has the option -Wcast-qual
to warn when a C-style cast removes a type qualifier. Combined with -Werror
, you can prevent it completely if you want.
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