add

ccxt/static_dependencies/lark/grammar.py

@@ -0,0 +1,130 @@
+from typing import Optional, Tuple, ClassVar, Sequence
+
+from .utils import Serialize
+
+###{standalone
+TOKEN_DEFAULT_PRIORITY = 0
+
+
+class Symbol(Serialize):
+    __slots__ = ('name',)
+
+    name: str
+    is_term: ClassVar[bool] = NotImplemented
+
+    def __init__(self, name: str) -> None:
+        self.name = name
+
+    def __eq__(self, other):
+        assert isinstance(other, Symbol), other
+        return self.is_term == other.is_term and self.name == other.name
+
+    def __ne__(self, other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(self.name)
+
+    def __repr__(self):
+        return '%s(%r)' % (type(self).__name__, self.name)
+
+    fullrepr = property(__repr__)
+
+    def renamed(self, f):
+        return type(self)(f(self.name))
+
+
+class Terminal(Symbol):
+    __serialize_fields__ = 'name', 'filter_out'
+
+    is_term: ClassVar[bool] = True
+
+    def __init__(self, name, filter_out=False):
+        self.name = name
+        self.filter_out = filter_out
+
+    @property
+    def fullrepr(self):
+        return '%s(%r, %r)' % (type(self).__name__, self.name, self.filter_out)
+
+    def renamed(self, f):
+        return type(self)(f(self.name), self.filter_out)
+
+
+class NonTerminal(Symbol):
+    __serialize_fields__ = 'name',
+
+    is_term: ClassVar[bool] = False
+
+
+class RuleOptions(Serialize):
+    __serialize_fields__ = 'keep_all_tokens', 'expand1', 'priority', 'template_source', 'empty_indices'
+
+    keep_all_tokens: bool
+    expand1: bool
+    priority: Optional[int]
+    template_source: Optional[str]
+    empty_indices: Tuple[bool, ...]
+
+    def __init__(self, keep_all_tokens: bool=False, expand1: bool=False, priority: Optional[int]=None, template_source: Optional[str]=None, empty_indices: Tuple[bool, ...]=()) -> None:
+        self.keep_all_tokens = keep_all_tokens
+        self.expand1 = expand1
+        self.priority = priority
+        self.template_source = template_source
+        self.empty_indices = empty_indices
+
+    def __repr__(self):
+        return 'RuleOptions(%r, %r, %r, %r)' % (
+            self.keep_all_tokens,
+            self.expand1,
+            self.priority,
+            self.template_source
+        )
+
+
+class Rule(Serialize):
+    """
+        origin : a symbol
+        expansion : a list of symbols
+        order : index of this expansion amongst all rules of the same name
+    """
+    __slots__ = ('origin', 'expansion', 'alias', 'options', 'order', '_hash')
+
+    __serialize_fields__ = 'origin', 'expansion', 'order', 'alias', 'options'
+    __serialize_namespace__ = Terminal, NonTerminal, RuleOptions
+
+    origin: NonTerminal
+    expansion: Sequence[Symbol]
+    order: int
+    alias: Optional[str]
+    options: RuleOptions
+    _hash: int
+
+    def __init__(self, origin: NonTerminal, expansion: Sequence[Symbol],
+                 order: int=0, alias: Optional[str]=None, options: Optional[RuleOptions]=None):
+        self.origin = origin
+        self.expansion = expansion
+        self.alias = alias
+        self.order = order
+        self.options = options or RuleOptions()
+        self._hash = hash((self.origin, tuple(self.expansion)))
+
+    def _deserialize(self):
+        self._hash = hash((self.origin, tuple(self.expansion)))
+
+    def __str__(self):
+        return '<%s : %s>' % (self.origin.name, ' '.join(x.name for x in self.expansion))
+
+    def __repr__(self):
+        return 'Rule(%r, %r, %r, %r)' % (self.origin, self.expansion, self.alias, self.options)
+
+    def __hash__(self):
+        return self._hash
+
+    def __eq__(self, other):
+        if not isinstance(other, Rule):
+            return False
+        return self.origin == other.origin and self.expansion == other.expansion
+
+
+###}