56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
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"""
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GTSAM Copyright 2010-2020, Georgia Tech Research Corporation,
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Atlanta, Georgia 30332-0415
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All Rights Reserved
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See LICENSE for the license information
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Parser classes and rules for parsing C++ variables.
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Author: Varun Agrawal, Gerry Chen
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"""
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from typing import List
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from pyparsing import Optional, ParseResults # type: ignore
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from .tokens import DEFAULT_ARG, EQUAL, IDENT, SEMI_COLON
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from .type import TemplatedType, Type
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class Variable:
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"""
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Rule to parse variables.
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Variables are a combination of Type/TemplatedType and the variable identifier.
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E.g.
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```
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class Hello {
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string name; // This is a property variable.
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};
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Vector3 kGravity; // This is a global variable.
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````
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"""
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rule = ((Type.rule ^ TemplatedType.rule)("ctype") #
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+ IDENT("name") #
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+ Optional(EQUAL + DEFAULT_ARG)("default") #
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+ SEMI_COLON #
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).setParseAction(lambda t: Variable(
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t.ctype, #
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t.name, #
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t.default[0] if isinstance(t.default, ParseResults) else None))
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def __init__(self,
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ctype: List[Type],
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name: str,
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default: ParseResults = None,
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parent=''):
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self.ctype = ctype[0] # ParseResult is a list
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self.name = name
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self.default = default
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self.parent = parent
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def __repr__(self) -> str:
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return '{} {}'.format(self.ctype.__repr__(), self.name)
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