112 lines
3.2 KiB
Python
112 lines
3.2 KiB
Python
# Copyright (c) 2013 Paul Tagliamonte <paultag@debian.org>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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from hy.models.expression import HyExpression
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from hy.models.string import HyString
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from hy.models.symbol import HySymbol
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from hy.models.list import HyList
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from hy.models.integer import HyInteger
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from hy.models.float import HyFloat
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from hy.models.complex import HyComplex
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from hy.models.dict import HyDict
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from hy.util import str_type
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from collections import defaultdict
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MACROS = [
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"hy.core.bootstrap",
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]
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_hy_macros = defaultdict(dict)
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def macro(name):
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def _(fn):
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module_name = fn.__module__
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if module_name.startswith("hy.core"):
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module_name = None
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_hy_macros[module_name][name] = fn
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return fn
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return _
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def require(source_module_name, target_module_name):
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macros = _hy_macros[source_module_name]
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refs = _hy_macros[target_module_name]
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for name, macro in macros.items():
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refs[name] = macro
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def _wrap_value(x):
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wrapper = _wrappers.get(type(x))
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if wrapper is None:
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return x
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else:
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return wrapper(x)
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_wrappers = {
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int: HyInteger,
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bool: lambda x: HySymbol("True") if x else HySymbol("False"),
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float: HyFloat,
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complex: HyComplex,
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str_type: HyString,
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dict: lambda d: HyDict(_wrap_value(x) for x in sum(d.items(), ())),
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list: lambda l: HyList(_wrap_value(x) for x in l)
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}
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def process(tree, module_name):
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load_macros()
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old = None
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while old != tree:
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old = tree
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tree = macroexpand(tree, module_name)
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return tree
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def load_macros():
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for module in MACROS:
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__import__(module)
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def macroexpand(tree, module_name):
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if isinstance(tree, HyExpression):
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if tree == []:
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return tree
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fn = tree[0]
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if fn in ("quote", "quasiquote"):
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return tree
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ntree = HyExpression(tree[:])
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ntree.replace(tree)
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if isinstance(fn, HyString):
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m = _hy_macros[module_name].get(fn)
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if m is None:
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m = _hy_macros[None].get(fn)
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if m is not None:
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obj = _wrap_value(m(*ntree[1:]))
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obj.replace(tree)
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return obj
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return ntree
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return tree
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