# Bytes subscript

## Simple

```py
b = b"\x00abc\xff"

reveal_type(b[0])  # revealed: Literal[b"\x00"]
reveal_type(b[1])  # revealed: Literal[b"a"]
reveal_type(b[4])  # revealed: Literal[b"\xff"]

reveal_type(b[-1])  # revealed: Literal[b"\xff"]
reveal_type(b[-2])  # revealed: Literal[b"c"]
reveal_type(b[-5])  # revealed: Literal[b"\x00"]

reveal_type(b[False])  # revealed: Literal[b"\x00"]
reveal_type(b[True])  # revealed: Literal[b"a"]

x = b[5]  # error: [index-out-of-bounds] "Index 5 is out of bounds for bytes literal `Literal[b"\x00abc\xff"]` with length 5"
reveal_type(x)  # revealed: Unknown

y = b[-6]  # error: [index-out-of-bounds] "Index -6 is out of bounds for bytes literal `Literal[b"\x00abc\xff"]` with length 5"
reveal_type(y)  # revealed: Unknown
```

## Function return

```py
def int_instance() -> int:
    return 42

a = b"abcde"[int_instance()]
# TODO: Support overloads... Should be `bytes`
reveal_type(a)  # revealed: @Todo
```