forked from M-Labs/artiq
Add support for Compare.
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whitequark
parent
fe69c5b465
commit
20b7a73b49
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@ -163,13 +163,14 @@ class TValue(Type):
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def is_var(typ):
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return isinstance(typ.find(), TVar)
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def is_mono(typ, name, **params):
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def is_mono(typ, name=None, **params):
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typ = typ.find()
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params_match = True
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for param in params:
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params_match = params_match and typ.params[param] == params[param]
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params_match = params_match and \
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typ.params[param].find() == params[param].find()
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return isinstance(typ, TMono) and \
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typ.name == name and params_match
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(name is None or (typ.name == name and params_match))
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def is_tuple(typ, elts=None):
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typ = typ.find()
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@ -283,7 +283,6 @@ class ASTTypedRewriter(algorithm.Transformer):
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# expr
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visit_Call = visit_unsupported
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visit_Compare = visit_unsupported
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visit_Dict = visit_unsupported
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visit_DictComp = visit_unsupported
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visit_Ellipsis = visit_unsupported
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@ -393,11 +392,14 @@ class Inferencer(algorithm.Visitor):
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node.attr_loc, [node.value.loc])
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self.engine.process(diag)
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def _unify_collection(self, element, collection):
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# TODO: support more than just lists
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self._unify(builtins.TList(element.type), collection.type,
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element.loc, collection.loc)
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def visit_SubscriptT(self, node):
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self.generic_visit(node)
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# TODO: support more than just lists
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self._unify(builtins.TList(node.type), node.value.type,
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node.loc, node.value.loc)
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self._unify_collection(element=node, collection=node.value)
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def visit_IfExpT(self, node):
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self.generic_visit(node)
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@ -455,43 +457,39 @@ class Inferencer(algorithm.Visitor):
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def _coerce_one(self, typ, coerced_node, other_node):
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if coerced_node.type.find() == typ.find():
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return coerced_node
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elif isinstance(coerced_node, asttyped.CoerceT):
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node.type, node.other_expr = typ, other_node
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else:
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node = asttyped.CoerceT(type=typ, expr=coerced_node, other_expr=other_node,
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loc=coerced_node.loc)
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self.visit(node)
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return node
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def _coerce_numeric(self, left, right):
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# Implements the coercion protocol.
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def _coerce_numeric(self, nodes, map_return=lambda typ: typ):
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# See https://docs.python.org/3/library/stdtypes.html#numeric-types-int-float-complex.
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if builtins.is_float(left.type) or builtins.is_float(right.type):
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typ = builtins.TFloat()
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elif builtins.is_int(left.type) or builtins.is_int(right.type):
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left_width, right_width = \
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builtins.get_int_width(left.type), builtins.get_int_width(left.type)
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if left_width and right_width:
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typ = builtins.TInt(types.TValue(max(left_width, right_width)))
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else:
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typ = builtins.TInt()
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elif types.is_var(left.type) or types.is_var(right.type): # not enough info yet
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node_types = [node.type for node in nodes]
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if any(map(types.is_var, node_types)): # not enough info yet
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return
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else: # conflicting types
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printer = types.TypePrinter()
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note1 = diagnostic.Diagnostic("note",
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"expression of type {typea}", {"typea": printer.name(left.type)},
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left.loc)
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note2 = diagnostic.Diagnostic("note",
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"expression of type {typeb}", {"typeb": printer.name(right.type)},
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right.loc)
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elif not all(map(builtins.is_numeric, node_types)):
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err_node = next(filter(lambda node: not builtins.is_numeric(node.type), nodes))
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diag = diagnostic.Diagnostic("error",
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"cannot coerce {typea} and {typeb} to a common numeric type",
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{"typea": printer.name(left.type), "typeb": printer.name(right.type)},
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left.loc, [right.loc],
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[note1, note2])
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"cannot coerce {type} to a numeric type",
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{"type": types.TypePrinter().name(err_node.type)},
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err_node.loc, [])
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self.engine.process(diag)
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return
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elif any(map(builtins.is_float, node_types)):
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typ = builtins.TFloat()
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elif any(map(builtins.is_int, node_types)):
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widths = map(builtins.get_int_width, node_types)
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if all(widths):
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typ = builtins.TInt(types.TValue(max(widths)))
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else:
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typ = builtins.TInt()
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else:
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assert False
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return typ, typ, typ
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return map_return(typ)
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def _order_by_pred(self, pred, left, right):
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if pred(left.type):
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@ -515,7 +513,7 @@ class Inferencer(algorithm.Visitor):
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self.engine.process(diag)
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return
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return self._coerce_numeric(left, right)
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return self._coerce_numeric((left, right), lambda typ: (typ, typ, typ))
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elif isinstance(op, ast.Add):
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# add works on numbers and also collections
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if builtins.is_collection(left.type) or builtins.is_collection(right.type):
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@ -554,7 +552,7 @@ class Inferencer(algorithm.Visitor):
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left.loc, right.loc)
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return left.type, left.type, right.type
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else:
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return self._coerce_numeric(left, right)
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return self._coerce_numeric((left, right), lambda typ: (typ, typ, typ))
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elif isinstance(op, ast.Mult):
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# mult works on numbers and also number & collection
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if types.is_tuple(left.type) or types.is_tuple(right.type):
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@ -585,10 +583,10 @@ class Inferencer(algorithm.Visitor):
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return list_.type, left.type, right.type
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else:
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return self._coerce_numeric(left, right)
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return self._coerce_numeric((left, right), lambda typ: (typ, typ, typ))
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elif isinstance(op, (ast.Div, ast.FloorDiv, ast.Mod, ast.Pow, ast.Sub)):
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# numeric operators work on any kind of number
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return self._coerce_numeric(left, right)
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return self._coerce_numeric((left, right), lambda typ: (typ, typ, typ))
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else: # MatMult
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diag = diagnostic.Diagnostic("error",
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"operator '{op}' is not supported", {"op": op.loc.source()},
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@ -605,6 +603,42 @@ class Inferencer(algorithm.Visitor):
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node.right = self._coerce_one(right_type, node.right, other_node=node.left)
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node.type.unify(return_type) # should never fail
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def visit_CompareT(self, node):
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self.generic_visit(node)
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pairs = zip([node.left] + node.comparators, node.comparators)
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if all(map(lambda op: isinstance(op, (ast.Is, ast.IsNot)), node.ops)):
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for left, right in pairs:
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self._unify(left.type, right.type,
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left.loc, right.loc)
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elif all(map(lambda op: isinstance(op, (ast.In, ast.NotIn)), node.ops)):
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for left, right in pairs:
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self._unify_collection(element=left, collection=right)
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else: # Eq, NotEq, Lt, LtE, Gt, GtE
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operands = [node.left] + node.comparators
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operand_types = [operand.type for operand in operands]
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if any(map(builtins.is_collection, operand_types)):
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for left, right in pairs:
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self._unify(left.type, right.type,
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left.loc, right.loc)
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else:
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typ = self._coerce_numeric(operands)
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if typ:
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try:
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other_node = next(filter(lambda operand: operand.type.find() == typ.find(),
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operands))
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except StopIteration:
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# can't find an argument with an exact type, meaning
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# the return value is more generic than any of the inputs, meaning
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# the type is known (typ is not None), but its width is not
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def wide_enough(opreand):
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return types.is_mono(opreand.type) and \
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opreand.type.find().name == typ.find().name
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other_node = next(filter(wide_enough, operands))
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print(typ, other_node)
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node.left, *node.comparators = \
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[self._coerce_one(typ, operand, other_node) for operand in operands]
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node.type.unify(builtins.TBool())
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def visit_Assign(self, node):
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self.generic_visit(node)
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if len(node.targets) > 1:
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@ -27,3 +27,15 @@
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a = []; a += [1]
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# CHECK-L: a:list(elt=int(width='r)) = []:list(elt=int(width='r)); a:list(elt=int(width='r)) += [1:int(width='r)]:list(elt=int(width='r))
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[] is [1]
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# CHECK-L: []:list(elt=int(width='s)) is [1:int(width='s)]:list(elt=int(width='s)):bool
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1 in [1]
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# CHECK-L: 1:int(width='t) in [1:int(width='t)]:list(elt=int(width='t)):bool
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[] < [1]
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# CHECK-L: []:list(elt=int(width='u)) < [1:int(width='u)]:list(elt=int(width='u)):bool
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1.0 < 1
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# CHECK-L: 1.0:float < 1:int(width='v):float:bool
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@ -25,13 +25,7 @@
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# CHECK-L: ${LINE:+1}: note: operand of type list(elt='b), which is not a valid repetition amount
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[1] * []
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# CHECK-L: ${LINE:+3}: error: cannot coerce list(elt='a) and NoneType to a common numeric type
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# CHECK-L: ${LINE:+2}: note: expression of type list(elt='a)
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# CHECK-L: ${LINE:+1}: note: expression of type NoneType
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[] - None
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# CHECK-L: ${LINE:+2}: error: cannot coerce list(elt='a) to float
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# CHECK-L: ${LINE:+1}: note: expression that required coercion to float
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# CHECK-L: ${LINE:+1}: error: cannot coerce list(elt='a) to a numeric type
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[] - 1.0
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# CHECK-L: ${LINE:+2}: error: expression of type int(width='a) has to be coerced to float, which makes assignment invalid
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