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common.py
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common.py
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"""
This file contains important information for the calculator.
"""
from collections import OrderedDict, namedtuple
from typing import List
Token = namedtuple('Token', ('name', 'value'))
Value = namedtuple('Value', ('type', 'value'))
class RuleMatch:
def __init__(self, name: str, matched: List[Token]):
self.name = name
self.matched = matched
self.value = None
def __str__(self):
return self._str(self) # + '\n>> ' + self.infix()
def __repr__(self):
return str(self)
def _str(self, ast, depth=0) -> str:
output = (('\t' * depth) + ast.name + ' = ' + str(ast.value if ast.value else None)) + '\n'
for matched in ast.matched:
if isinstance(matched, RuleMatch) and matched.matched:
output += self._str(matched, depth + 1)
else:
output += (('\t' * (depth + 1)) + matched.name + ': ' + matched.value) + '\n'
return output
token_map = OrderedDict((
(r'\d+(?:\.\d+)?', 'NUM'),
(r'sqrt', 'OPR'),
(r'exp', 'OPR'),
(r'det', 'OPR'),
(r'adj', 'OPR'),
(r'trans', 'OPR'),
(r'cof', 'OPR'),
(r'inv', 'OPR'),
(r'identity', 'OPR'),
(r'trnsform', 'OPR'),
(r'rref', 'OPR'),
(r'[a-zA-Z_]+', 'IDT'),
(r'=', 'EQL'),
(r'\+', 'ADD'),
(r'-', 'ADD'),
(r'\*\*', 'POW'),
(r'\*', 'MUL'),
(r'\/', 'MUL'),
(r'%', 'MUL'),
(r'\^', 'POW'),
(r'\(', 'LPA'),
(r'\)', 'RPA'),
(r'\[', 'LBR'),
(r'\]', 'RBR'),
(r'\,', 'CMA'),
(r'\|', 'PPE')
))
remove = ('EQL', 'LPA', 'RPA', 'LBR', 'RBR', 'CMA', 'PPE')
class IndexedOrderedDict(OrderedDict):
def index(self, key):
return list(self.keys()).index(key)
def key_at(self, i):
return list(self.keys())[i]
rules_map = IndexedOrderedDict((
('asn', ('IDT EQL add',)),
('mat', ('LBR mbd RBR',)),
('mbd', ('mrw PPE mbd',)),
('mrw', ('add CMA mrw',)),
('add', ('mul ADD add',)),
('mui', ('pow mul',)),
('mul', ('pow MUL mul',)),
('pow', ('opr POW pow',)),
('opr', ('OPR LPA mat RPA',)),
('neg', ('ADD num', 'ADD opr')),
('var', ('IDT',)),
('num', ('NUM', 'LPA add RPA')),
))
left_assoc = {
'ADD': 'add',
'MUL': 'mul',
}