Re: Eliding of slice range checking

[Kagamin via Digitalmars-d-learn]

On Wednesday, 23 October 2019 at 11:20:59 UTC, Per Nordlöw wrote:
Does DMD/LDC avoid range-checking in slice-expressions such as 
the one in my array-overload of `startsWith` defined as

bool startsWith(T)(scope const(T)[] haystack,
                   scope const(T)[] needle)
{
    if (haystack.length >= needle.length)
    {
        return haystack[0 .. needle.length] == needle; // is 
slice range checking avoid here?
    }
    return false;
}

LDC is good at optimizing simple patterns, the only pitfall I 
know is 
https://forum.dlang.org/post/eoftnwkannqmubhjo...@forum.dlang.org