On Sunday, 19 May 2013 at 00:14:26 UTC, Walter Bright wrote:
this() { assert(0); }
makes for a runtime check, not a compile time one. Compile time
checks are more efficient in both programmer time and run time.
Note that C++11 8.4.3 has @disable as well, in the form:
S() = delete;
D has @disable. If default constructor are allowed, default
constructor can be disabled, as any other declared symbol.
With NotNull, the runtime check only happens upon assignment
and initialization from a pointer type. Dereferencing, copying,
etc., of NotNull entails zero runtime overhead and no checks.
People go for the shortest path. You end up having nullable
everywhere. Experience have been a countless amount of time in
bazillion programming languages. But it is probably too late to
fix this in D anyway.
