yumaikas zrewidował ten Gist . Przejdź do rewizji
1 file changed, 1 insertion, 1 deletion
parse_alta.py
| @@ -4,7 +4,7 @@ import re | |||
| 4 | 4 | from collections import namedtuple | |
| 5 | 5 | ||
| 6 | 6 | Pattern = namedtuple("Pattern", ["stack", "value"]) | |
| 7 | - | Rule = namedtuple("Rule", ["pattern", "consequenc"]) | |
| 7 | + | Rule = namedtuple("Rule", ["pattern", "consequence"]) | |
| 8 | 8 | ||
| 9 | 9 | def parse(code): | |
| 10 | 10 | idx = 0 | |
yumaikas zrewidował ten Gist . Przejdź do rewizji
1 file changed, 111 insertions
parse_alta.py(stworzono plik)
| @@ -0,0 +1,111 @@ | |||
| 1 | + | #! /bin/env python3 | |
| 2 | + | ||
| 3 | + | import re | |
| 4 | + | from collections import namedtuple | |
| 5 | + | ||
| 6 | + | Pattern = namedtuple("Pattern", ["stack", "value"]) | |
| 7 | + | Rule = namedtuple("Rule", ["pattern", "consequenc"]) | |
| 8 | + | ||
| 9 | + | def parse(code): | |
| 10 | + | idx = 0 | |
| 11 | + | STATE_FIND_OUTER_DELIM = "find/outer-delim" | |
| 12 | + | STATE_FIND_INNER_DELIM = "find/inner-delim" | |
| 13 | + | STATE_READ_STACK_VALUE = "read/stack-name" | |
| 14 | + | STATE_READ_VALUE_NAME = "read/value-name" | |
| 15 | + | ||
| 16 | + | state = STATE_FIND_OUTER_DELIM | |
| 17 | + | ||
| 18 | + | def EOF(): | |
| 19 | + | return idx > len(code) | |
| 20 | + | ||
| 21 | + | def isWhitespace(char): | |
| 22 | + | return char.isspace() | |
| 23 | + | ||
| 24 | + | def ch(): | |
| 25 | + | if idx < len(code): | |
| 26 | + | return code[idx] | |
| 27 | + | else: | |
| 28 | + | return "" | |
| 29 | + | ||
| 30 | + | outer_delim = None | |
| 31 | + | inner_delim = None | |
| 32 | + | ||
| 33 | + | rules = [] | |
| 34 | + | ||
| 35 | + | rule_pattern = [] | |
| 36 | + | rule_consequence = [] | |
| 37 | + | ||
| 38 | + | pattern_target = rule_pattern | |
| 39 | + | ||
| 40 | + | stack_label = "" | |
| 41 | + | value_label = "" | |
| 42 | + | ||
| 43 | + | def clean_str(str): | |
| 44 | + | return re.sub(r"\s+", "", str).strip() | |
| 45 | + | ||
| 46 | + | def push_pattern(): | |
| 47 | + | pattern_target.append(Pattern( | |
| 48 | + | stack = clean_str(stack_label), | |
| 49 | + | value = clean_str(value_lable) | |
| 50 | + | )) | |
| 51 | + | stack_label = "" | |
| 52 | + | value_label = "" | |
| 53 | + | ||
| 54 | + | def push_rule(): | |
| 55 | + | rules.append(Rule( | |
| 56 | + | pattern = rule_pattern, | |
| 57 | + | consequence = rule_consequence | |
| 58 | + | )) | |
| 59 | + | rule_pattern = [] | |
| 60 | + | rule_consequence = [] | |
| 61 | + | ||
| 62 | + | while not EOF(): | |
| 63 | + | if state == STATE_FIND_OUTER_DELIM: | |
| 64 | + | if isWhitespace(ch()): | |
| 65 | + | idx += 1 | |
| 66 | + | else: | |
| 67 | + | outer_delim = ch() | |
| 68 | + | pattern_target = rule_pattern | |
| 69 | + | state = STATE_FIND_INNER_DELIM | |
| 70 | + | idx += 1 | |
| 71 | + | elif state == STATE_FIND_INNER_DELIM: | |
| 72 | + | if isWhitespace(ch()): | |
| 73 | + | idx += 1 | |
| 74 | + | else: | |
| 75 | + | inner_delim = ch() | |
| 76 | + | idx += 1 | |
| 77 | + | state = STATE_READ_STACK_NAME | |
| 78 | + | elif state == STATE_READ_STACK_NAME: | |
| 79 | + | if ch() == inner_delim: | |
| 80 | + | state = STATE_READ_VALUE_NAME | |
| 81 | + | idx += 1 | |
| 82 | + | elif ch() == outer_delim: | |
| 83 | + | push_pattern() | |
| 84 | + | idx += 1 | |
| 85 | + | state = STATE_FIND_INNER_DELIM | |
| 86 | + | else: | |
| 87 | + | stack_label += ch() | |
| 88 | + | idx += 1 | |
| 89 | + | elif state == STATE_READ_VALUE_NAME: | |
| 90 | + | if ch() == inner_delim: | |
| 91 | + | push_pattern() | |
| 92 | + | idx += 1 | |
| 93 | + | state = STATE_READ_STACK_NAME | |
| 94 | + | elif ch() == outer_delim and pattern_target == rule_pattern: | |
| 95 | + | push_pattern() | |
| 96 | + | pattern_target = rule_consequence | |
| 97 | + | state = STATE_FIND_INNER_DELIM | |
| 98 | + | idx += 1 | |
| 99 | + | elif ch() == outer_delim and pattern_target == rule_consequence: | |
| 100 | + | push_pattern() | |
| 101 | + | push_rule() | |
| 102 | + | pattern_target = rule_pattern | |
| 103 | + | state = STATE_FIND_INNER_DELIM | |
| 104 | + | idx += 1 | |
| 105 | + | else: | |
| 106 | + | value_label += ch() | |
| 107 | + | idx += 1 | |
| 108 | + | if len(rule_consequence) > 0 or len(rule_pattern) > 0: | |
| 109 | + | push_pattern() | |
| 110 | + | push_rule() | |
| 111 | + | return rules | |
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