Well the whole mess come from the fact that D conflate C string and D string.

The first problem come from the fact that D array are implicitly convertible to pointer. So calling D function that expect a char* is possible with D string even if it is unsafe and will not work in the general case.

The fact that D provide tricks that will make it work in special cases is armful as previous discussion have shown (many D programmer assume that this will always work because of toy tests they have made, where in case it won't and toStringz must be used).

The only sane solution I can think of is to :
 - disallow slice to convert implicitly to pointer. .ptr is made for that.
- Do not put any trailing 0 in string literal, unless it is specified explicitly ( "foobar\0" ). - Except if a const(char)* is expected from the string literal. In case it becomes a Cstring literal, with a trailing 0. This is made to allow uses like printf("foobar");

In other terms, the receiver type is used to decide if the compiler generate a string literal or a Cstring literal.

Other addition of 0 are just confusing, and will make incorrect code work in special cases, which is something you usually don't want. Code that work by accident often backfire in spectacular ways at the least expected moment.

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