Should opIndex take precedence over pointer indexing?

[claptrap via Digitalmars-d-learn]

struct Foo
{
    float* what;
    float opIndex(size_t idx) { return what[idx]; }
}
Foo* foo;
float x = foo[idx]; // ***


*** <source>(68): Error: cannot implicitly convert expression 
`foo[cast(ulong)idx]` of type `Foo` to `float`

IE, pointer indexing of 'foo' takes precedence over the opIndex 
of foo. Is this expected?