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Copy pathbuiltin_predicates.py
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196 lines (163 loc) · 5.74 KB
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from typing import Text, Tuple, Any, Dict
import collections
import re
import types
import io
import _thread
from echo.elog import log
from echo.epy_object import EPyObject, try_invoke
from echo.interp_result import Result, check_result, ExceptionData
from echo.eobjects import EBuiltin, register_builtin, get_guest_builtin
from echo.interp_context import ICtx
from echo import iteration_helpers
@register_builtin('bool')
@check_result
def _do_bool_call(args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
assert len(args) == 1 and not kwargs
o = args[0]
if not isinstance(o, EPyObject):
assert isinstance(o, (int, bool, str, set, tuple, dict, list,
collections.deque, types.FunctionType,
types.MethodType, types.BuiltinMethodType,
types.BuiltinFunctionType,
types.MethodDescriptorType,
getattr(_thread, 'RLock'), io.TextIOBase,
type(NotImplemented),
type(None), getattr(re, 'Match'))), \
(o, type(o))
return Result(bool(o))
if isinstance(o, EBuiltin):
log('fo:truthy', f'builtin o: {o}')
return Result(True)
if isinstance(o, EPyObject):
if o.get_type().hasattr('__bool__'):
f_ = o.getattr('__bool__', ictx)
if f_.is_exception():
return f_
f = f_.get_value()
return f.invoke((), {}, {}, ictx)
if o.get_type().hasattr('__len__'):
do_len = get_guest_builtin('len')
res = do_len.invoke((o,), {}, {}, ictx)
if res.is_exception():
return res
v = res.get_value()
return Result(bool(v))
return Result(True)
raise NotImplementedError(o)
@register_builtin('any')
@check_result
def _do_any(args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
assert len(args) == 1, args
found = False
do_bool = get_guest_builtin('bool')
def callback(item) -> Result[bool]:
res = do_bool.invoke((item,), {}, {}, ictx)
if res.is_exception():
return res
b = res.get_value()
assert isinstance(b, bool), b
return Result(b)
res = iteration_helpers.foreach(args[0], callback, ictx)
if res.is_exception():
return res
return Result(found)
@register_builtin('callable')
@check_result
def _do_callable(args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
assert len(args) == 1 and not kwargs, (args, kwargs)
o = args[0]
if not isinstance(o, EPyObject):
return Result(callable(o))
do_hasattr = get_guest_builtin('hasattr')
return do_hasattr.invoke((o, '__call__'), {}, {}, ictx)
@register_builtin('min')
@check_result
def _do_min(
args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
if (not isinstance(args[0], EPyObject) and
not isinstance(args[1], EPyObject)):
return Result(min(args[0], args[1]))
do_getattr = get_guest_builtin('getattr')
do_lt_ = do_getattr.invoke((args[0], '__lt__',), {}, {}, ictx)
if do_lt_.is_exception():
return do_lt_
do_lt = do_lt_.get_value()
res = do_lt.invoke((args[1],), {}, {}, ictx)
if res.is_exception():
return res
return Result(args[0] if res.get_value() else args[1])
def _do_max_iterable(iterable: Any, ictx: ICtx) -> Result[Any]:
sentinel = object()
accum = sentinel
do_max = get_guest_builtin('max')
def cb(o) -> Result[bool]:
nonlocal accum
if accum is sentinel:
accum = o
else:
res = do_max.invoke((accum, o), {}, {}, ictx)
if res.is_exception():
return res
accum = res.get_value()
return Result(True)
res = iteration_helpers.foreach(iterable, cb, ictx)
if res.is_exception():
return res
if accum is sentinel:
return Result(ExceptionData(
None, None, ValueError('max() arg is an empty sequence')))
return Result(accum)
@register_builtin('max')
@check_result
def _do_max(
args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
if len(args) == 1:
assert not kwargs
return _do_max_iterable(args[0], ictx)
if (not isinstance(args[0], EPyObject) and
not isinstance(args[1], EPyObject)):
return Result(max(args[0], args[1]))
do_getattr = get_guest_builtin('getattr')
do_lt = do_getattr.invoke((args[0], '__lt__',), {}, {}, ictx)
if do_lt.is_exception():
return do_lt
do_lt = do_lt.get_value()
assert isinstance(do_lt, EPyObject), do_lt
res = try_invoke(do_lt, (args[1],), {}, {}, ictx)
if res.is_exception():
return res
return Result(args[1] if res.get_value() else args[0])
@register_builtin('sum')
@check_result
def _do_sum(
args: Tuple[Any, ...],
kwargs: Dict[Text, Any],
ictx: ICtx) -> Result[Any]:
assert 1 <= len(args) <= 2 and not kwargs
accum = 0 if len(args) == 1 else args[2]
def callback(item) -> Result[bool]:
nonlocal accum
add_res = item.getattr('__add__', ictx)
if add_res.is_exception():
return add_res
f = add_res.get_value()
res = f.invoke((accum,), {}, {}, ictx)
if res.is_exception():
return res
accum = res.get_value()
return Result(True)
res = iteration_helpers.foreach(args[0], callback, ictx)
if res.is_exception():
return res
return Result(accum)