![Paul Tagliamonte](/assets/img/avatar_default.png)
The core shall from now on be only for the core language bits. Macro bits shall live in hy.macros and in hy.compiler. This cleans up garbage.
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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