72 lines
1.5 KiB
Python
72 lines
1.5 KiB
Python
#! /usr/bin/env python
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# -*- coding: utf-8 -*-
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# vim:fenc=utf-8
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#
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# Copyright © 2017 lafrite <lafrite@Poivre>
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#
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# Distributed under terms of the MIT license.
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"""
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"""
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from ..coroutine import *
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@coroutine
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def look_for_rdleaf(target):
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""" Coroutine which look to "{...}" which are RdLeaf
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:example:
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>>> from ..str2 import list_sink
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>>> str2list = look_for_rdleaf(list_sink)
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>>> for i in "{a}+{a*b}-2":
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... str2list.send(i)
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>>> a = str2list.throw(STOOOP)
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>>> a
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[<RdLeaf a>, '+', <RdLeaf a*b>, '-', '2']
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"""
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try:
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target_ = target()
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except TypeError:
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target_ = target
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try:
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while True:
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tok = yield
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if tok == "{":
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stack = ""
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stacking = True
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elif tok == "}":
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target_.send(RdLeaf(stack))
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stack = ""
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stacking = False
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else:
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if stacking:
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stack += tok
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else:
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target_.send(tok)
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except STOOOP as err:
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yield target_.throw(err)
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class RdLeaf():
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""" Random leaf
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"""
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def __init__(self, name):
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self._name = name
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self.rdleaf = True
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@property
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def name(self):
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return self._name
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def replace(self, computed):
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return computed[self._name]
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def __str__(self):
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return "{" + self._name + "}"
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def __repr__(self):
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return f"<{self.__class__.__name__} {self._name}>"
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