Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}

module bug50;
extern(C) int printf(char*, ...);

struct S
{
    int i;
    float f;
    long l;

    void print()
    {
        printf("%d %f %lx\n", i, f, l);
    }
}

void main()
{
    S s;
    s.print();
    s = S(1,2,3);
    s.print();

    S[] arr;
    {arr ~= s;}
    {arr[0].print();}
    {arr ~= S(1,2,3);}
    {arr[1].print();}
}