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Allow also passing iterables to lists.
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e07057c224
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@ -804,8 +804,7 @@ class Inferencer(algorithm.Visitor):
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elif builtins.is_builtin(typ, "class list"):
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valid_forms = lambda: [
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valid_form("list() -> list(elt='a)"),
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# TODO: add this form when adding iterators
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# valid_form("list(x) -> list(elt='a)")
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valid_form("list(x:'a) -> list(elt='b) where 'a is iterable")
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]
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self._unify(node.type, builtins.TList(),
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@ -813,6 +812,20 @@ class Inferencer(algorithm.Visitor):
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if len(node.args) == 0 and len(node.keywords) == 0:
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pass # []
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elif len(node.args) == 1 and len(node.keywords) == 0:
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arg, = node.args
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if builtins.is_iterable(arg.type):
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pass
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else:
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note = diagnostic.Diagnostic("note",
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"this expression has type {type}",
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{"type": types.TypePrinter().name(arg.type)},
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arg.loc)
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diag = diagnostic.Diagnostic("error",
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"the argument of list() must be of an iterable type", {},
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node.func.loc, notes=[note])
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self.engine.process(diag)
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else:
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diagnose(valid_forms())
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elif builtins.is_builtin(typ, "function range"):
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@ -854,7 +867,7 @@ class Inferencer(algorithm.Visitor):
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if len(node.args) == 1 and len(node.keywords) == 0:
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arg, = node.args
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if builtins.is_list(arg.type) or builtins.is_range(arg.type):
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if builtins.is_iterable(arg.type):
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pass
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else:
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note = diagnostic.Diagnostic("note",
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@ -8,5 +8,8 @@ int(1.0, width=a)
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# CHECK-L: ${LINE:+1}: error: the argument of len() must be of an iterable type
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len(1)
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# CHECK-L: ${LINE:+1}: error: the argument of list() must be of an iterable type
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list(1)
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# CHECK-L: ${LINE:+1}: error: an argument of range() must be of a numeric type
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range([])
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