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Refactor scripts in Tools/peg_generator/scripts (GH-20401)

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(cherry picked from commit ba6fd87e41)

Co-authored-by: Lysandros Nikolaou <lisandrosnik@gmail.com>
This commit is contained in:
Miss Islington (bot) 2020-06-05 21:41:12 -07:00 • committed by GitHub
parent d5e7348e41
commit 18f1226884
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7 changed files with 146 additions and 147 deletions
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21
Tools/peg_generator/scripts/show_parse.py
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@ -41,7 +41,13 @@
parser.add_argument(
"-d", "--diff", action="store_true", help="show diff between grammar and ast (requires -g)"
)
parser.add_argument("-g", "--grammar-file", help="grammar to use (default: use the ast module)")
parser.add_argument(
"-p",
"--parser",
choices=["new", "old"],
default="new",
help="choose the parser to use"
)
parser.add_argument(
"-m",
"--multiline",
@ -84,19 +90,18 @@ def print_parse(source: str, verbose: bool = False) -> None:
def main() -> None:
args = parser.parse_args()
if args.diff and not args.grammar_file:
parser.error("-d/--diff requires -g/--grammar-file")
new_parser = args.parser == "new"
if args.multiline:
sep = "\n"
else:
sep = " "
program = sep.join(args.program)
if args.grammar_file:
if new_parser:
tree = _peg_parser.parse_string(program)
if args.diff:
a = tree
b = _peg_parser.parse_string(program, oldparser=True)
a = _peg_parser.parse_string(program, oldparser=True)
b = tree
diff = diff_trees(a, b, args.verbose)
if diff:
for line in diff:
@ -104,11 +109,11 @@ def main() -> None:
else:
print("# Trees are the same")
else:
print(f"# Parsed using {args.grammar_file}")
print("# Parsed using the new parser")
print(format_tree(tree, args.verbose))
else:
tree = _peg_parser.parse_string(program, oldparser=True)
print("# Parse using the old parser")
print("# Parsed using the old parser")
print(format_tree(tree, args.verbose))