mirror of https://github.com/astral-sh/ruff
1.5 KiB
1.5 KiB
Bytes subscripts
Indexing
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
def int_instance() -> int:
return 42
a = b"abcde"[int_instance()]
# TODO: Support overloads... Should be `bytes`
reveal_type(a) # revealed: @Todo
Slices
b = b"\x00abc\xff"
reveal_type(b[0:2]) # revealed: Literal[b"\x00a"]
reveal_type(b[-3:]) # revealed: Literal[b"bc\xff"]
b[0:4:0] # error: [zero-stepsize-in-slice]
b[:4:0] # error: [zero-stepsize-in-slice]
b[0::0] # error: [zero-stepsize-in-slice]
b[::0] # error: [zero-stepsize-in-slice]
def int_instance() -> int: ...
byte_slice1 = b[int_instance() : int_instance()]
# TODO: Support overloads... Should be `bytes`
reveal_type(byte_slice1) # revealed: @Todo
def bytes_instance() -> bytes: ...
byte_slice2 = bytes_instance()[0:5]
# TODO: Support overloads... Should be `bytes`
reveal_type(byte_slice2) # revealed: @Todo