36 lines
1.0 KiB
Python
36 lines
1.0 KiB
Python
from .schema import dataspacePatterns as P
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from . import Symbol, Record
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_dict = dict ## we're about to shadow the builtin
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_ = P.Pattern.DDiscard(P.DDiscard())
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def bind(p):
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return P.Pattern.DBind(P.DBind(p))
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CAPTURE = bind(_)
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def lit(v):
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if isinstance(v, list) or isinstance(v, tuple):
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return arr(*map(lit, v))
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elif isinstance(v, set) or isinstance(v, frozenset):
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raise Exception('Cannot represent literal set in dataspace pattern')
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elif isinstance(v, _dict):
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return dict(*((k, lit(vv)) for (k, vv) in v.items()))
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elif isinstance(v, Record):
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return _rec(v.key, *map(lit, v.fields))
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else:
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return P.Pattern.DLit(P.DLit(P.AnyAtom.decode(v)))
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def rec(labelstr, *members):
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return _rec(Symbol(labelstr), *members)
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def _rec(label, *members):
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return P.Pattern.DCompound(P.DCompound.rec(label, members))
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def arr(*members):
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return P.Pattern.DCompound(P.DCompound.arr(members))
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def dict(*kvs):
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return P.Pattern.DCompound(P.DCompound.dict(_dict(kvs)))
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