description

# operator - method

1. @Since.new('3.3')

Pointer<Int64> operator -(

1. int offset

)

A pointer to the `offset`th Int64 before this one.

Equivalent to `this + (-offset)`.

Returns a pointer to the Int64 whose address is `offset` times the size of `Int64` before the address of this pointer. That is, `(this - offset).address == this.address - offset * sizeOf<Int64>()`.

Also, `(this - offset).value` is equivalent to `this[-offset]`, and similarly for setting,

## Implementation

    @Since('3.3')
    @pragma("vm:prefer-inline")
    Pointer<Int64> operator -(int offset) =>
        Pointer.fromAddress(address - sizeOf<Int64>() * offset);