summaryrefslogtreecommitdiffstats
path: root/debian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py
diff options
context:
space:
mode:
Diffstat (limited to 'debian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py')
-rwxr-xr-xdebian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py93
1 files changed, 93 insertions, 0 deletions
diff --git a/debian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py b/debian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py
new file mode 100755
index 00000000..cd42bd9f
--- /dev/null
+++ b/debian/uncrustify-trinity/uncrustify-trinity-0.78.1/scripts/grammar_permutator.py
@@ -0,0 +1,93 @@
+#!/usr/bin/python
+import argparse
+
+from nltk.parse.generate import generate
+from nltk import CFG
+from os.path import exists
+from sys import exit as sys_exit
+
+DEMO_GRAMMAR = """
+ S -> 'import ' ImportList ';' | 'static import ' ImportList ';'
+ ImportList -> Import | ImportBindings | Import ', ' ImportList
+ Import -> ModuleFullyQualifiedName | ModuleAliasIdentifier ' = ' ModuleFullyQualifiedName
+ ImportBindings -> Import ' : ' ImportBindList
+ ImportBindList -> ImportBind | ImportBind ', ' ImportBindList
+ ImportBind -> Identifier | Identifier ' = ' Identifier
+
+ ModuleAliasIdentifier -> Identifier
+
+ Packages -> PackageName | Packages '.' PackageName
+ ModuleFullyQualifiedName -> ModuleName | Packages '.' ModuleName
+ PackageName -> Identifier
+ ModuleName -> Identifier
+
+ Identifier -> 'x'
+"""
+
+
+def valid_file(arg_parser, *args):
+ """
+ checks if on of the provided paths is a file
+
+
+ Parameters
+ ----------------------------------------------------------------------------
+ :param arg_parser:
+ argument parser object that is called if no file is found
+
+ :param args: list< str >
+ a list of file path that is going to be checked
+
+
+ :return: str
+ ----------------------------------------------------------------------------
+ path to an existing file
+ """
+ arg = None
+ found_flag = False
+ for arg in args:
+ if exists(arg):
+ found_flag = True
+ break
+ if not found_flag:
+ arg_parser.error("file(s) do not exist: %s" % args)
+
+ return arg
+
+
+def main(args):
+ grammar_string = DEMO_GRAMMAR
+
+ if args.input_file_path:
+ with open(args.input_file_path, 'r') as f:
+ grammar_string = f.read()
+
+ grammar = CFG.fromstring(grammar_string)
+
+ for sentence in generate(grammar, depth=args.depth):
+ print(''.join(sentence))
+
+ return 0
+
+
+if __name__ == "__main__":
+ arg_parser = argparse.ArgumentParser()
+
+ arg_parser.add_argument(
+ '-i', '--input_file_path',
+ metavar='<path>',
+ type=lambda x: valid_file(arg_parser, x),
+ help="Path to the grammar file",
+ required=False
+ )
+ arg_parser.add_argument(
+ '-d', '--depth',
+ metavar='<nr>',
+ type=int,
+ default=9,
+ help='Max depth of grammar tree.'
+ )
+
+ FLAGS, unparsed = arg_parser.parse_known_args()
+
+ sys_exit(main(FLAGS))