| 1 | #!/usr/bin/env python2
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| 2 | """asdl/pybase.py is a runtime library for ASDL in Python"""
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| 3 | from __future__ import print_function
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| 4 |
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| 5 | from mycpp import mylib
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| 6 |
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| 7 | from typing import TYPE_CHECKING
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| 8 | if TYPE_CHECKING:
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| 9 | from _devbuild.gen.hnode_asdl import hnode_t
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| 10 | from asdl.runtime import TraversalState
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| 11 |
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| 12 |
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| 13 | class SimpleObj(int):
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| 14 | """Base type of simple sum types, which are integers."""
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| 15 | # TODO: Get rid of this class? mycpp uses it to tell if it should generate
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| 16 | # h8_id or h8_id*.
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| 17 | pass
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| 18 |
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| 19 |
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| 20 | class CompoundObj(object):
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| 21 | # The tag is set for variant types, which are subclasses of sum types.
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| 22 | # It's not set for product types.
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| 23 | _type_tag = 0 # Starts at 1. Zero is invalid
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| 24 |
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| 25 | def PrettyTree(self, do_abbrev, trav=None):
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| 26 | # type: (bool, TraversalState) -> hnode_t
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| 27 | raise NotImplementedError(self.__class__.__name__)
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| 28 |
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| 29 | def __repr__(self):
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| 30 | # type: () -> str
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| 31 | """Print this ASDL object nicely."""
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| 32 |
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| 33 | # TODO: Break this circular dependency.
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| 34 | from asdl import format as fmt
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| 35 |
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| 36 | f = mylib.BufWriter()
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| 37 | tree = self.PrettyTree(False)
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| 38 | fmt.HNodePrettyPrint(tree, f)
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| 39 | return f.getvalue()
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