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Fix accidental group duplication

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Leading to unnecessary ambiguities
This commit is contained in:
John Doty 2024-09-13 15:28:50 -07:00
parent ca240906c9
commit 8845bcfdab
1 changed files with 9 additions and 5 deletions
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14
parser/wadler.py
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@ -348,7 +348,7 @@ class Printer:
def compile_rule(self, rule: parser.NonTerminal) -> Matcher:
generated_grammar: list[typing.Tuple[str, list[str]]] = []
visited: set[str] = set()
group_count = 0
groups: dict[tuple[str, ...], str] = {}
indent_amounts: dict[str, int] = {}
newline_map: dict[str, str] = {}
done_forced_break = False
@ -361,7 +361,7 @@ class Printer:
generated_grammar.append((name, trans_prod))
def compile_production(production: parser.FlattenedWithMetadata) -> list[str]:
nonlocal group_count
nonlocal groups
nonlocal indent_amounts
nonlocal done_forced_break
@ -394,9 +394,13 @@ class Printer:
if isinstance(pretty, parser.FormatMeta):
if pretty.group:
# Make a fake rule.
rule_name = f"g_{group_count}"
group_count += 1
generated_grammar.append((rule_name, tx_children))
child_key = tuple(tx_children)
rule_name = groups.get(child_key)
if rule_name is None:
rule_name = f"g_{len(groups)}"
groups[child_key] = rule_name
generated_grammar.append((rule_name, tx_children))
tx_children = [rule_name]
if pretty.indent: