Zander/4-variable-simplifier
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

even when switched over to infix-notation, parenthses still are too slow

Browse source
This commit is contained in:
Zander Thannhauser 2025-06-05 20:18:09 -05:00
parent ea07e1072c
commit 5d04064f6d
1 changed files with 7 additions and 41 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
main.py
View file

@ -362,53 +362,19 @@ def get_simplifications(args, available_operators):
return cache[available_operators];
def create_parser():
import pyparsing as pp
from pyparsing import infix_notation, opAssoc, Word, oneOf
root = pp.infix_notation(pp.Word("01wxyz"), [
# this can't handle parenthesis very well...
# do I really have to write my own parser?
root = infix_notation(Word("01wxyz"), [
('!', 1, opAssoc.RIGHT),
(oneOf('< <= > >='), 2, opAssoc.LEFT),
(oneOf('== !='), 2, opAssoc.LEFT),
(oneOf('&& !& &!'), 2, opAssoc.LEFT),
(oneOf('|| !| |!'), 2, opAssoc.LEFT)])
# from pyparsing import Forward, Suppress, Keyword, Group, ZeroOrMore, Optional, Literal
# root = Forward()
# literal = pp.Word('01');
# variable = pp.Word('wxyz')
# highest = literal | variable | (Suppress('(') + root + Suppress(')'));
# prefix_expression = Group(Literal("!") + highest) | highest
# relational_expression = \
# Group(prefix_expression + Literal('<=') + prefix_expression) \
# | Group(prefix_expression + Literal('>=') + prefix_expression) \
# | Group(prefix_expression + Literal('>') + prefix_expression) \
# | Group(prefix_expression + Literal('<') + prefix_expression) \
# | Group(prefix_expression + Literal('==') + prefix_expression) \
# | Group(prefix_expression + Literal('!=') + prefix_expression) \
# | prefix_expression;
# logical_and_expression = Forward();
# logical_and_expression <<= \
# Group(relational_expression + Literal('&&') + logical_and_expression) \
# | Group(relational_expression + Literal('!&') + logical_and_expression) \
# | Group(relational_expression + Literal('&!') + logical_and_expression) \
# | relational_expression;
# logical_or_expression = Forward()
# logical_or_expression <<= \
# Group(logical_and_expression + Literal('||') + logical_or_expression) \
# | Group(logical_and_expression + Literal('!|') + logical_or_expression) \
# | Group(logical_and_expression + Literal('|!') + logical_or_expression) \
# | logical_and_expression;
# root <<= logical_or_expression;
(oneOf('|| !| |!'), 2, opAssoc.LEFT)]);
return root;
def parse(parser, text):
return parser.parseString(text, parseAll = True).asList()[0]