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from __future__ import annotations
from collections.abc import Iterator
from dataclasses import dataclass
from fractions import Fraction
from io import StringIO
from typing import Any
import numpy as np
class NotFound:
pass
class Env:
__slots__ = ("data", "outer")
def __init__(self, data: dict[str, Any], outer: Env | None = None) -> None:
self.data = data
self.outer = outer
def __getitem__(self, key: str) -> Any:
if key in self.data:
return self.data[key]
if self.outer is not None:
return self.outer[key]
def __setitem__(self, key: str, val: Any) -> None:
self.data[key] = val
def __delitem__(self, key: str) -> None:
if key in self.data:
del self.data[key]
elif self.outer is not None:
del self.outer[key]
def __contains__(self, key: str) -> bool:
if key in self.data:
return True
if self.outer is not None:
return key in self.outer
return False
def update(self, my_dict: dict[str, Any]) -> None:
self.data.update(my_dict)
def get(self, key: str) -> Any:
if key in self.data:
return self.data[key]
if self.outer is not None:
return self.outer.get(key)
return NotFound()
class Sym:
__slots__ = ("val", "hash", "lineno", "column")
def __init__(self, val: str, lineno: int = -1, column: int = -1):
assert isinstance(val, str)
self.val = val
self.hash = hash(val)
self.lineno = lineno
self.column = column
def __str__(self) -> str:
return self.val
__repr__ = __str__
def __hash__(self) -> int:
return self.hash
def __eq__(self, obj: object) -> bool:
return type(obj) is Sym and self.hash == obj.hash
class Keyword:
__slots__ = "val"
def __init__(self, val: str):
self.val = val
def __str__(self) -> str:
return f"#:{self.val}"
__repr__ = __str__
def __eq__(self, obj: object) -> bool:
return type(obj) is Keyword and self.val == obj.val
class QuotedKeyword:
__slots__ = "val"
def __init__(self, val: Keyword | str):
self.val = val if isinstance(val, Keyword) else Keyword(val)
def __str__(self) -> str:
return f"{self.val}"
__repr__ = __str__
def __eq__(self, obj: object) -> bool:
return type(obj) is QuotedKeyword and self.val == obj.val
class Quoted:
__slots__ = "val"
def __init__(self, val: tuple):
self.val = val
def __len__(self) -> int:
return len(self.val)
def __getitem__(self, key: int | slice) -> Any:
if isinstance(key, slice) or type(self.val[key]) is tuple:
return Quoted(self.val[key])
return self.val[key]
def __iter__(self) -> Iterator:
return self.val.__iter__()
def __contains__(self, item: object) -> bool:
return item in self.val
def __eq__(self, obj: object) -> bool:
return type(obj) is Quoted and self.val == obj.val
class Char:
__slots__ = "val"
def __init__(self, val: str | int):
if type(val) is int:
self.val: str = chr(val)
else:
assert type(val) is str and len(val) == 1
self.val = val
def __str__(self) -> str:
return self.val
def __repr__(self) -> str:
names = {" ": "space", "\n": "newline", "\t": "tab"}
return f"#\\{self.val}" if self.val not in names else f"#\\{names[self.val]}"
def __eq__(self, obj: object) -> bool:
return type(obj) is Char and self.val == obj.val
def __radd__(self, obj2: str) -> str:
return obj2 + self.val
def display_dtype(dtype: np.dtype) -> str:
if dtype.kind == "b":
return "bool"
if dtype.kind == "i":
return f"int{dtype.itemsize * 8}"
if dtype.kind == "u":
return f"uint{dtype.itemsize * 8}"
return f"float{dtype.itemsize * 8}"
def display_str(val: object) -> str:
if val is None:
return "#<void>"
if val is True:
return "#t"
if val is False:
return "#f"
if type(val) is Sym:
return val.val
if type(val) is str:
return val
if type(val) is Char:
return f"{val}"
if type(val) is range:
return "#<range>"
if type(val) is complex:
join = "" if val.imag < 0 else "+"
return f"{val.real}{join}{val.imag}i"
if type(val) is np.bool_:
return "1" if val else "0"
if type(val) is np.float64 or type(val) is np.float32:
return f"{float(val)}"
if type(val) is Fraction:
return f"{val.numerator}/{val.denominator}"
if type(val) is Quoted or type(val) is tuple:
if not val:
return "()"
result = StringIO()
result.write(f"({display_str(val[0])}")
for item in val[1:]:
result.write(f" {display_str(item)}")
result.write(")")
return result.getvalue()
if type(val) is list:
if not val:
return "#()"
result = StringIO()
result.write(f"#({print_str(val[0])}")
for item in val[1:]:
result.write(f" {print_str(item)}")
result.write(")")
return result.getvalue()
if isinstance(val, dict):
result = StringIO()
result.write("#hash(")
is_first = True
for k, v in val.items():
if is_first:
result.write(f"[{print_str(k)} {print_str(v)}]")
is_first = False
else:
result.write(f" [{print_str(k)} {print_str(v)}]")
result.write(")")
return result.getvalue()
if isinstance(val, np.ndarray):
result = StringIO()
result.write(f"(array '{display_dtype(val.dtype)}")
if val.dtype.kind == "b":
for item in val:
result.write(" 1" if item else " 0")
else:
for item in val:
result.write(f" {item}")
result.write(")")
return result.getvalue()
return f"{val!r}"
str_escape = {
"\\": "\\\\",
'"': '\\"',
"\r": "\\r",
"\f": "\\f",
"\v": "\\v",
"\n": "\\n",
"\t": "\\t",
"\b": "\\b",
"\a": "\\a",
}
def print_str(val: object) -> str:
if type(val) is str:
for k, v in str_escape.items():
val = val.replace(k, v)
return f'"{val}"'
if type(val) is Char:
return f"{val!r}"
if type(val) is Keyword:
return f"'{val}"
if type(val) in (Sym, Quoted, QuotedKeyword):
return f"'{display_str(val)}"
return display_str(val)
@dataclass(slots=True)
class PaletClass:
name: str
attrs: tuple
values: list
def __str__(self) -> str:
result = StringIO()
result.write(f"({self.name}")
for i, val in enumerate(self.values):
result.write(f" #:{self.attrs[i * 2]} {print_str(val)}")
result.write(")")
return result.getvalue()
__repr__ = __str__
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