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Add inferencing for Tuple, List, For.
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76ce364fea
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@ -22,32 +22,61 @@ class scoped(object):
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list of variables resolved as globals
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"""
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class ClassDefT(ast.ClassDef, scoped):
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pass
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class FunctionDefT(ast.FunctionDef, scoped):
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pass
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class LambdaT(ast.Lambda, scoped):
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pass
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class DictCompT(ast.DictComp, scoped):
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pass
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class ListCompT(ast.ListComp, scoped):
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pass
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class SetCompT(ast.SetComp, scoped):
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pass
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class argT(ast.arg, commontyped):
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pass
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class NumT(ast.Num, commontyped):
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class ClassDefT(ast.ClassDef, scoped):
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pass
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class FunctionDefT(ast.FunctionDef, scoped):
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pass
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class AttributeT(ast.Attribute, commontyped):
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pass
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class BinOpT(ast.BinOp, commontyped):
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pass
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class BoolOpT(ast.BoolOp, commontyped):
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pass
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class CallT(ast.Call, commontyped):
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pass
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class CompareT(ast.Compare, commontyped):
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pass
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class DictT(ast.Dict, commontyped):
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pass
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class DictCompT(ast.DictComp, commontyped, scoped):
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pass
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class EllipsisT(ast.Ellipsis, commontyped):
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pass
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class GeneratorExpT(ast.GeneratorExp, commontyped, scoped):
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pass
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class IfExpT(ast.IfExp, commontyped):
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pass
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class LambdaT(ast.Lambda, commontyped, scoped):
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pass
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class ListT(ast.List, commontyped):
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pass
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class ListCompT(ast.ListComp, commontyped, scoped):
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pass
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class NameT(ast.Name, commontyped):
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pass
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class NameConstantT(ast.NameConstant, commontyped):
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pass
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class NumT(ast.Num, commontyped):
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pass
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class SetT(ast.Set, commontyped):
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pass
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class SetCompT(ast.SetComp, commontyped, scoped):
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pass
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class StrT(ast.Str, commontyped):
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pass
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class StarredT(ast.Starred, commontyped):
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pass
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class SubscriptT(ast.Subscript, commontyped):
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pass
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class TupleT(ast.Tuple, commontyped):
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pass
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class UnaryOpT(ast.UnaryOp, commontyped):
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pass
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class YieldT(ast.Yield, commontyped):
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pass
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class YieldFromT(ast.YieldFrom, commontyped):
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pass
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@ -86,6 +86,9 @@ class TMono(Type):
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def __repr__(self):
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return "TMono(%s, %s)" % (repr(self.name), repr(self.params))
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def __getitem__(self, param):
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return self.params[param]
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def __eq__(self, other):
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return isinstance(other, TMono) and \
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self.name == other.name and \
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@ -150,14 +153,22 @@ def TBool():
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"""A boolean type."""
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return TMono("bool")
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def TInt(width=TVar()):
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def TInt(width=None):
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"""A generic integer type."""
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if width is None:
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width = TVar()
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return TMono("int", {"width": width})
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def TFloat():
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"""A double-precision floating point type."""
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return TMono("float")
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def TList(elt=None):
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"""A generic list type."""
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if elt is None:
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elt = TVar()
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return TMono("list", {"elt": elt})
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class TypePrinter(object):
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"""
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@ -184,6 +184,8 @@ class Inferencer(algorithm.Transformer):
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"name '{name}' is not bound to anything", {"name":name}, loc)
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self.engine.process(diag)
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# Visitors that replace node with a typed node
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#
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def visit_arg(self, node):
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return asttyped.argT(type=self._find_name(node.arg, node.loc),
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arg=node.arg, annotation=self.visit(node.annotation),
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@ -206,6 +208,22 @@ class Inferencer(algorithm.Transformer):
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return asttyped.NameT(type=self._find_name(node.id, node.loc),
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id=node.id, ctx=node.ctx, loc=node.loc)
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def visit_Tuple(self, node):
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node = self.generic_visit(node)
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return asttyped.TupleT(type=types.TTuple([x.type for x in node.elts]),
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elts=node.elts, ctx=node.ctx, loc=node.loc)
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def visit_List(self, node):
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node = self.generic_visit(node)
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node = asttyped.ListT(type=types.TList(),
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elts=node.elts, ctx=node.ctx, loc=node.loc)
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for elt in node.elts:
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self._unify(node.type['elt'], elt.type,
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node.loc, elt.loc)
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return node
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# Visitors that just unify types
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#
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def visit_Assign(self, node):
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node = self.generic_visit(node)
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if len(node.targets) > 1:
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@ -222,6 +240,13 @@ class Inferencer(algorithm.Transformer):
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node.target.loc, node.value.loc)
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return node
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def visit_For(self, node):
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node = self.generic_visit(node)
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# TODO: support more than just lists
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self._unify(TList(node.target.type), node.iter.type,
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node.target.loc, node.iter.loc)
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return node
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class Printer(algorithm.Visitor):
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def __init__(self, buf):
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self.rewriter = source.Rewriter(buf)
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@ -232,7 +257,7 @@ class Printer(algorithm.Visitor):
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def generic_visit(self, node):
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if hasattr(node, 'type'):
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self.rewriter.insert_after(node.loc, " : %s" % self.type_printer.name(node.type))
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self.rewriter.insert_after(node.loc, ":%s" % self.type_printer.name(node.type))
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super().generic_visit(node)
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