48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
registry = {}
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all_primitives = []
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primitive_number_of_arguments = []
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def primitive(name, unwrap_spec, wrap_spec):
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assert '$' + name not in registry, '${name} already defined'.format(name=name)
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primitive_number_of_arguments.append(len(unwrap_spec) - 1) # first argument is the receiver
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def expose(func):
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def unwrapper(w_receiver, args_w, space):
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args = [w_receiver] + args_w
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if len(args) != len(unwrap_spec):
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raise TypeError(
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"Expected {ex} arguments, received {re}.".format(ex=len(unwrap_spec), re=len(args)))
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unwrapped_args = ()
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for t, arg in zip(unwrap_spec, args):
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if t is int:
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unwrapped_args += (arg.value, )
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else:
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unwrapped_args += (arg, )
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result = func(*unwrapped_args)
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if wrap_spec is int:
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return space.newint(result)
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return result
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unwrapper.__qualname__ = name
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all_primitives.append(unwrapper)
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registry['$' + name] = len(all_primitives) - 1
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return None
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return expose
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def get_index_of_primitive_named(name):
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return registry[name]
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def get_number_of_arguments_of_primitive(idx):
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return primitive_number_of_arguments[idx]
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@primitive('int_add', [int, int], int)
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def simple_int_add(a, b):
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return a + b
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@primitive('int_eq', [int, int], int)
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def simple_int_eq(a, b):
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return a == b
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