def parse(input_expr, context, debug=False):
with open(os.path.join(os.path.dirname(__file__), 'matrip.peg'), 'r') as f:
grammar = f.read()
parser = ParserPEG(grammar, "matrip", debug=debug)
parse_tree = parser.parse(input_expr)
visitor = MatripVisitor(debug=debug)
visit_parse_tree(parse_tree, visitor)
return generate_base_table(visitor.measures, visitor.expressions, context)
def main():
functions = {
"add": zadd,
"get": zget,
"not": znot,
"print": zprint
}
visitor = ZVisitor(functions)
parser = ParserPython(program, comment)
prog = sys.stdin.read() if len(sys.argv) == 1 else open(sys.argv[1]).read()
parse_tree = parser.parse(prog)
visit_parse_tree(parse_tree, visitor)
def solve(file, verbose):
simple_parser = ParserPEG(simple_grammar, root_rule_name='expr')
advanced_parser = ParserPEG(advanced_grammar, root_rule_name='expr')
simple_sum = 0
advanced_sum = 0
for line in file:
parse_tree = simple_parser.parse(line)
simple_sum += visit_parse_tree(parse_tree, SimpleVisitor())
parse_tree = advanced_parser.parse(line)
advanced_sum += visit_parse_tree(parse_tree, AdvancedVisitor())
print('Part 1:', simple_sum)
print('Part 2:', advanced_sum)
def parse(input_expr):
"""
@param input_expr type str
@return calcVisitor type CalcVisitor
"""
parser = ParserPEG(calc_grammar, "calc")
parse_tree = parser.parse(input_expr)
calcVisitor = CalcVisitor()
visit_parse_tree(parse_tree, calcVisitor)
return calcVisitor
def parse(content: str) -> 'Atom':
from foil.language.grammar import atom
from foil.language.grammar import comment
parser = ParserPython(atom, comment_def=comment)
parse_tree = parser.parse(content)
return visit_parse_tree(parse_tree, FoilVisitor())
def parse(content: str) -> 'Literal':
from foil.language.grammar import literal
from foil.language.grammar import comment
parser = ParserPython(literal, comment_def=comment)
parse_tree = parser.parse(content)
return visit_parse_tree(parse_tree, FoilVisitor())
def parse(filename, debug=False):
with open(filename) as file:
contents = file.read()
parser = ParserPEG(calc_grammar, "start", True)
parse_tree = parser.parse(contents)
visitor = Visitor(debug=debug)
result = visit_parse_tree(parse_tree, visitor )
#Try to get if we found anything or not
if ( visitor.functions or visitor.classes):
print (visitor.namespace )
return visitor
print ("Empty")
return None
def main(debug=False):
# Grammar is defined using textual specification based on PEG language.
# Load grammar form file.
calc_grammar = open(os.path.join(os.path.dirname(__file__), 'calc.peg'),
'r').read()
# First we will make a parser - an instance of the calc parser model.
# Parser model is given in the form of PEG notation therefore we
# are using ParserPEG class. Root rule name (parsing expression) is "calc".
parser = ParserPEG(calc_grammar, "calc", debug=debug)
# An expression we want to evaluate
input_expr = "-(4-1)*5+(2+4.67)+5.89/(.2+7)"
# Then parse tree is created out of the input_expr expression.
parse_tree = parser.parse(input_expr)
# The result is obtained by semantic evaluation using visitor class.
# visit_parse_tree will start semantic analysis.
# In this case semantic analysis will evaluate expression and
# returned value will be evaluated result of the input_expr expression.
result = visit_parse_tree(parse_tree, CalcVisitor(debug=debug))
# Check that result is valid
assert (result - -7.51194444444) < 0.0001
print("{} = {}".format(input_expr, result))
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('-d', '--debug', action='store_true', default=False, help='Debug Arpeggio parser')
parser.add_argument('-v', '--verbose', action='store_true', default=False, help='Increase output verbosity')
parser.add_argument('--no-order', action='store_true', default=False, help='Do not use OrderedDict')
parser.add_argument('--no-visit', action='store_true', default=False, help='Do not visit the parsed tree')
parser.add_argument('--rule', default='m_source_file', help='Root rule name')
parser.add_argument('source_file', help='Source file to parse')
global args
args = parser.parse_args()
logging.basicConfig(level=logging.DEBUG if args.verbose or args.debug else logging.WARNING, stream=sys.stdout)
with open(args.source_file) as source_file:
source_code = source_file.read()
log.debug('Source file "{}" was read with success.'.format(args.source_file))
with open(m_grammar_file_path) as m_grammar_file:
m_grammar = m_grammar_file.read()
global m_parser
m_parser = ParserPEG(m_grammar, args.rule, debug=args.debug, reduce_tree=False)
log.debug('M language clean-PEG grammar was parsed with success.')
parse_tree = m_parser.parse(source_code)
log.debug('Source file "{}" was parsed with success.'.format(args.source_file))
if not args.no_visit:
result = visit_parse_tree(parse_tree, MLanguageVisitor(debug=args.debug))
print(json.dumps(result))
return 0
def get_canonical_compound_unit_dict_from_string(self, unit_string):
# parse input and output units
parsed_unit = visit_parse_tree(self.parser.parse(unit_string),
UnitVisitor(debug=False))
canonical_compound_unit_dict = CanonicalCompoundUnit(
parsed_unit).get_unit_object_list()
return canonical_compound_unit_dict
def parse_query(self):
try:
self.parse_tree = self.parser.parse(self.restore_query)
except NoMatch as err:
return "Error"
self.tree_visitor = self.QueryVisitor()
# visit_parse_tree is an arpeggio method to parse the parse_tree created from the query
try:
visit_parse_tree(self.parse_tree, self.tree_visitor)
except SemanticError as err:
return str(err)
if len(self.tree_visitor.bracket_list) != 0:
return "Error: brackets not valid"
return "Success"
def validate_ged(fname):
f = open(fname, 'r')
ged = f.read()
f.close()
try:
res = ged_parser.parse(ged)
if len(ged) == 0:
raise ValueError("Error: File empty! {}".format(fname))
vis = GED_Visitor()
ged_content = visit_parse_tree(res, vis)
print("... {}".format(fname))
vis.validate()
try:
p = vis.pretty()
fnout = output_filename(fname, prefix=output_file_prefix)
f = open(fnout, 'w+')
f.write(p)
f.close()
print("OUTPUT: ")
print(" " + fnout)
except ValueError as e:
print(e)
except Exception as e:
print(e)
print("Sorry, could not parse {}", fname)
def test_semantic_action_results():
global first_sar, third_sar
input = "4 3 3 3 a 3 3 b"
parser = ParserPython(grammar, reduce_tree=False)
result = parser.parse(input)
PTDOTExporter().exportFile(result, "test_semantic_action_results_pt.dot")
visit_parse_tree(result, TestVisitor())
assert isinstance(first_sar, SemanticActionResults)
assert len(first_sar.third) == 3
assert third_sar.third_str[0] == "3"
def simulate(self, max_time):
# TODO: here you can change the number of register you want to use
# Prepare the environment for the simulation
# 3 registers and 256 of memory
environment = Environment(self.MAX_REG, 256, self.root.labels)
start_time = time.time()
current_instruction = 0
current_line = self.root[current_instruction].line
try:
# Execute the simulation
while True:
# While the time has not been exceeded
elapsed_time = time.time() - start_time
if elapsed_time > max_time:
raise SimulationError("Maximum time allowed for the simulation exceeded!")
# Check if the simulation is over
if current_instruction >= len(self.root) - 1:
break
# Do the instruction logic
current_instruction = visit_parse_tree(self.root[current_instruction], SimulatorVisitor(environment))
current_line = self.root[current_instruction].line
# Add the line who crashed so it's easier to debug
except SimulationError as error:
message, = error.args
raise SimulationError(message + " occurred at line " + str(current_line))
# Print the finale results
environment.print()
def test_mult_div_2():
''''
Test that a combination of multiplication and division with brackets
The M language specifies that multiplication are first, and last is the division
'''
source_code = '''
regle 123:
application : iliad, batch;
apple = 3.14*a / (b + 3) - 4;
'''
parse_tree = m_parser.parse(source_code)
nodes = visit_parse_tree(parse_tree, m_to_ast.MLanguageVisitor())
assert_equal(len(nodes), 1)
assert_equal(nodes[0]['type'], 'regle')
assert_equal(nodes[0]['name'], '123')
assert_equal(len(nodes[0]['formulas']), 1)
assert_equal(nodes[0]['formulas'][0]['type'], 'formula')
assert_equal(nodes[0]['formulas'][0]['name'], 'apple')
assert_equal(nodes[0]['formulas'][0]['expression']['type'], 'sum')
assert_equal(len(nodes[0]['formulas'][0]['expression']['operands']), 2)
assert_equal(nodes[0]['formulas'][0]['expression']['operands'][0]['type'],
'product')
assert_equal(
len(nodes[0]['formulas'][0]['expression']['operands'][0]['operands']),
3)
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][0]
['type'], 'float')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][0]
['value'], 3.14)
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][1]
['type'], 'symbol')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][1]
['value'], 'a')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][2]
['type'], 'invert')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][2]
['operand']['type'], 'sum')
assert_equal(
len(nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][2]
['operand']['operands']), 2)
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][2]
['operand']['operands'][0]['type'], 'symbol')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][0]['operands'][2]
['operand']['operands'][0]['value'], 'b')
assert_equal(nodes[0]['formulas'][0]['expression']['operands'][1]['type'],
'negate')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][1]['operand']
['type'], 'integer')
assert_equal(
nodes[0]['formulas'][0]['expression']['operands'][1]['operand']
['value'], 4)
def parse_query_str(query_string: str):
if len(query_string.strip()) == 0:
return {}
query_string = re.sub(r'[\s&&[^\n]]+', ' ', query_string)
pt = parser.parse(query_string)
result = arpeggio.visit_parse_tree(pt, TermsVisitor())
return result
def parse_asp_program_by_arpeggio(asp_source_code: str,
do=None,
have_comments: bool = True) -> tuple:
parser = ap.ParserPython(asp_grammar(),
asp_grammar_comments if have_comments else None)
parse_tree = parser.parse(asp_source_code)
return ap.visit_parse_tree(parse_tree, visitor=do or CodeAsTuple())
def parse_OMCValue__v_1_13(
literal: str
):
return arpeggio.visit_parse_tree(
get_omc_value_parser().parse(literal),
visitor.OMCValueVisitor__v_1_13(),
)
def test_semantic_action_results():
global first_sar, third_sar
input = "4 3 3 3 a 3 3 b"
parser = ParserPython(grammar, reduce_tree=False)
result = parser.parse(input)
PTDOTExporter().exportFile(result, 'test_semantic_action_results_pt.dot')
visit_parse_tree(result, Visitor(defaults=True))
assert isinstance(first_sar, SemanticActionResults)
assert len(first_sar.third) == 3
assert third_sar.third_str[0] == '3'
def parseResult(self, string):
try:
p = self.parser()
tree = p.parse(string)
return visit_parse_tree(tree, DrealParseTreeVisitor())
except NoMatch as e:
return None
def parse_string(self, src, grammar=program, filename=None):
oldsrcs = self.input_sources
self.context.optimization_level = self.optimization_level
self.input_sources = src
parser = ParserPython(
grammar,
comment_def=comment,
skipws=True,
reduce_tree=False,
memoization=True,
debug=False,
)
self.context.parsers.append(parser)
self.context.filenames.append(filename)
try:
parse_tree = parser.parse(self.input_sources)
visitor = MuvVisitor(debug=False)
visitor.muvparser = self
parse_tree = visit_parse_tree(parse_tree, visitor)
out = parse_tree.generate_code(self.context)
if self.error_found:
return False
if len(self.context.filenames) == 1:
if self.context.filenames[-1]:
filetext = " from {0}".format(
self.context.filenames[-1]
)
else:
filetext = ''
self.output = (
"( Generated{0} by the MUV compiler. )\n"
"( https://github.com/revarbat/pymuv )\n"
"{1}\n"
).format(filetext, self.output)
self.output += out
if not self.error_found and len(self.context.filenames) == 1:
if self.wrapper_program:
self.output = (
"@program {0}\n"
"1 99999 d\n"
"1 i\n"
"{1}\n"
".\n"
"c\n"
"q\n"
).format(self.wrapper_program, self.output)
return True
except MuvError as e:
line, col = parser.pos_to_linecol(e.position)
self.print_error(filename, line, col, str(e))
return False
except NoMatch as e:
line, col = parser.pos_to_linecol(e.position)
expected = self.simplify_parse_error(e)
self.print_error(filename, line, col, "Expected %s" % expected)
return False
finally:
self.input_sources = oldsrcs
self.context.parsers.pop()
self.context.filenames.pop()
def extractRelation(name):
tree = parser.parse(name)
tokens = visit_parse_tree(tree, Visitor(defaults=False,debug=False))
tag = None
names = []
i = ""
for token in tokens:
if isinstance(token,unicode):
i += token
elif tag == None:
tag = token
names.append(i)
i = ""
else:
raise Exception("Too many relations in field")
names.append(i)
if tag != None:
k = tag[0].lower()+"_name"
return {"name": names[0],
k: names[1],
"tag": tag[0],
"value": tag[1]}
else:
return {"name": names[0],
"tag": "simple"}
def parse_components(
literal: str
) -> typing.List[ComponentTuple]:
return arpeggio.visit_parse_tree(
get_omc_record_array_parser().parse(literal),
visitor.ComponentArrayVisitor(source=literal),
)
def main(debug=False):
# Grammar is defined using textual specification based on PEG language.
# Load grammar form file.
calc_grammar = open(os.path.join(os.path.dirname(__file__), 'calc.peg'),
'r').read()
# First we will make a parser - an instance of the calc parser model.
# Parser model is given in the form of PEG notation therefore we
# are using ParserPEG class. Root rule name (parsing expression) is "calc".
parser = ParserPEG(calc_grammar, "calc", debug=debug)
# An expression we want to evaluate
input_expr = "-(4-1)*5+(2+4.67)+5.89/(.2+7)"
# Then parse tree is created out of the input_expr expression.
parse_tree = parser.parse(input_expr)
# The result is obtained by semantic evaluation using visitor class.
# visit_parse_tree will start semantic analysis.
# In this case semantic analysis will evaluate expression and
# returned value will be evaluated result of the input_expr expression.
result = visit_parse_tree(parse_tree, CalcVisitor(debug=debug))
# Check that result is valid
assert (result - -7.51194444444) < 0.0001
print("{} = {}".format(input_expr, result))
def parse(file, enc):
with codecs.open(file, "r", encoding=enc) as opened_file:
opened_file_content = opened_file.read()
parser = ParserPython(segnetics_file, reduce_tree=True)
parse_tree = visit_parse_tree(parser.parse(opened_file_content),
SegneticsVisitor())
return parse_tree
def parse_terms(self, string: str) -> frozenset:
"""Return the frozenset computed from given valid ASP-compliant string"""
parse_tree = ap.ParserPython(self.grammar).parse(string)
if parse_tree:
return ap.visit_parse_tree(parse_tree, self.atom_visitor)
else:
return frozenset()
def main(debug=False):
current_dir = os.path.dirname(__file__)
peg_grammar = open(os.path.join(current_dir, 'peg.peg')).read()
# ParserPEG will use ParserPython to parse peg_grammar definition and
# create parser_model for parsing PEG based grammars
# In debug mode dot (graphviz) files for parser model
# and parse tree will be created for visualization.
# Checkout current folder for .dot files.
parser = ParserPEG(peg_grammar, 'peggrammar', debug=debug)
# Now we will use created parser to parse the same peg_grammar used for
# parser initialization. We can parse peg_grammar because it is specified
# using PEG itself.
print("PARSING")
parse_tree = parser.parse(peg_grammar)
# ASG should be the same as parser.parser_model because semantic
# actions will create PEG parser (tree of ParsingExpressions).
parser_model, comment_model = visit_parse_tree(
parse_tree, PEGVisitor(root_rule_name='peggrammar',
comment_rule_name='comment',
ignore_case=False,
debug=debug))
if debug:
# This graph should be the same as peg_peg_parser_model.dot because
# they define the same parser.
PMDOTExporter().exportFile(parser_model,
"peg_peg_new_parser_model.dot")
# If we replace parser_mode with ASG constructed parser it will still
# parse PEG grammars
parser.parser_model = parser_model
parser.parse(peg_grammar)
def main(argv):
# Parsing
#different alg relation next to each other i.e a*|b require brackets (a*)|b
parser = ParserPython(formula) #, debug=True) #, reduce_tree = True)
parse_tree = parser.parse(argv)
result = visit_parse_tree(parse_tree, formVisitor())
result.tostr()
return result
def load_from_str(self, content: str) -> 'Builder':
parser = ParserPython(cypher, comment_def=comment)
parsed = parser.parse(content)
visited = visit_parse_tree(parsed, KnowledgeVisitor())
base = RuleBase(visited['data'])
self.load_from_base(base)
return self
def visit_calc(self, n, c):
_expr = lambda ast: visit_parse_tree(ast, ParserCalc.ExpressionVisitor(debug=False))
if 'repeat' in c.results:
repeat = int(c.results['repeat'][0])
if 1 < repeat <= 20:
return [_expr(n) for _ in range(repeat)]
else:
return [_expr(n)]
def language_from_str(language_def, metamodel):
"""
Constructs parser and initializes metamodel from language description
given in textX language.
Args:
language_def (str): A language description in textX.
metamodel (TextXMetaModel): A metamodel to initialize.
Returns:
Parser for the new language.
"""
if metamodel.debug:
metamodel.dprint("*** PARSING LANGUAGE DEFINITION ***")
# Check the cache for already conctructed textX parser
if metamodel.debug in textX_parsers:
parser = textX_parsers[metamodel.debug]
else:
# Create parser for TextX grammars using
# the arpeggio grammar specified in this module
parser = ParserPython(textx_model,
comment_def=comment,
ignore_case=False,
reduce_tree=False,
memoization=metamodel.memoization,
debug=metamodel.debug,
file=metamodel.file)
# Cache it for subsequent calls
textX_parsers[metamodel.debug] = parser
# Parse language description with textX parser
try:
parse_tree = parser.parse(language_def)
except NoMatch as e:
line, col = parser.pos_to_linecol(e.position)
raise TextXSyntaxError(text(e), line, col)
# Construct new parser and meta-model based on the given language
# description.
lang_parser = visit_parse_tree(parse_tree, TextXVisitor(parser, metamodel))
# Meta-model is constructed. Validate its semantics.
metamodel.validate()
# Here we connect meta-model and language parser for convenience.
lang_parser.metamodel = metamodel
metamodel._parser_blueprint = lang_parser
if metamodel.debug:
# Create dot file for debuging purposes
PMDOTExporter().exportFile(
lang_parser.parser_model,
"{}_parser_model.dot".format(metamodel.rootcls.__name__))
return lang_parser
def parse(version, strict=False):
parser = _strict_parser if strict else _permissive_parser
try:
tree = parser.parse(version.strip())
except NoMatch as exc:
six.raise_from(ParseError(str(exc)), None)
return visit_parse_tree(tree, VersionVisitor())
def test_smoke():
smoke_m_file_path = os.path.join(script_dir_path, 'valid_formulas.m')
with open(smoke_m_file_path) as smoke_m_file:
source_code = smoke_m_file.read()
parse_tree = m_parser.parse(source_code)
nodes = visit_parse_tree(parse_tree, m_to_ast.MLanguageVisitor())
assert_equal(isinstance(nodes, list), True)
def visit_ged(ged):
try:
res = ged_parser.parse(ged)
vis = GED_Visitor()
ged_content = visit_parse_tree(res, vis)
return vis
except e:
print(e)
print("Sorry, could not parse {}", fname)
def parse(code: str) -> list:
'''
Parse a default Prolog syntax
:param code: Prolog predicates
:return: a list of Prolog ASTs
'''
ast0 = prolog_parser.parse(code)
ast1 = visit_parse_tree(ast0, PlgVisitor())
return ast1
def _from_peg(self, language_def):
parser = ParserPython(peggrammar, comment, reduce_tree=False,
debug=self.debug)
parser.root_rule_name = self.root_rule_name
parse_tree = parser.parse(language_def)
return visit_parse_tree(parse_tree, PEGVisitor(self.root_rule_name,
self.comment_rule_name,
self.ignore_case,
debug=self.debug))
def parse(source: str, have_return_value: bool) -> List[Statement]:
Context.return_value = have_return_value
parser: ParserPython = ParserPython(function_body_grammar, comment_grammar, autokwd=True,
memoization=True)
try:
parsed: ParseTreeNode = parser.parse(source)
body: List[Statement] = visit_parse_tree(parsed, ASTBuilder())
except NoMatch as err:
handle_parse_error(err, parser)
return body
def parse_bibtex(file_name, debug=False):
global parser
if parser is None:
parser = ParserPython(bibfile, debug=debug)
with codecs.open(file_name, "r", encoding="utf-8") as bibtexfile:
bibtexfile_content = bibtexfile.read()
parse_tree = parser.parse(bibtexfile_content)
return visit_parse_tree(parse_tree,
BibtexVisitor(debug=debug))
def parse_whatid(id_string, parser=None, visitor=None):
"""
Parses whatami id string into a pair (name, configuration).
Makes a best effort to reconstruct python objects.
Parameters
----------
id_string : string
The whatami id string to parse back.
parser : An arpeggio parser or None
The parser. Use None to use the default parser.
visitor : An arpeggio visitor or None.
Semantic actions over the AST.
If None, the default visitor (that returns a What object) is used.
Returns
-------
A two-tuple (what, out_name)
what is a `whatami.What` object, containing name and conf
out_name is a string or None
Examples
--------
>>> what = parse_whatid('rfc(n_jobs=multiple(here=100))')
>>> print(what.name)
rfc
>>> print(len(what.conf))
1
>>> print(what.conf['n_jobs'].conf['here'])
100
"""
global DEFAULT_WHATAMI_PARSER
if parser is None:
parser = DEFAULT_WHATAMI_PARSER
if visitor is None:
visitor = DEFAULT_WHATAMI_VISITOR
try:
return visit_parse_tree(parser.parse(id_string), visitor=visitor)
except TypeError:
# Remove this once arpeggio is released with this fix:
# https://github.com/igordejanovic/Arpeggio/pull/21
DEFAULT_WHATAMI_PARSER = build_whatami_parser()
raise
def main(debug=False):
# First we will make a parser - an instance of the calc parser model.
# Parser model is given in the form of PEG notation therefore we
# are using ParserPEG class. Root rule name (parsing expression) is "calc".
parser = ParserPEG(calc_grammar, "calc", debug=debug)
# An expression we want to evaluate
input_expr = "-(4-1)*5+(2+4.67)+5.89/(.2+7)"
# Then parse tree is created out of the input_expr expression.
parse_tree = parser.parse(input_expr)
result = visit_parse_tree(parse_tree, CalcVisitor(debug=debug))
# visit_parse_tree will start semantic analysis.
# In this case semantic analysis will evaluate expression and
# returned value will be evaluated result of the input_expr expression.
print("{} = {}".format(input_expr, result))
def main(debug=False):
# First we will make a parser - an instance of the CVS parser model.
# Parser model is given in the form of clean PEG description therefore we
# are using ParserPEG class from arpeggio.clenapeg. Grammar is loaded from
# csv.peg file Skipping of whitespace will be done only for tabs and
# spaces. Newlines have semantics in csv files. They are used to separate
# records.
current_dir = os.path.dirname(__file__)
csv_grammar = open(os.path.join(current_dir, 'csv.peg'), 'r').read()
parser = ParserPEG(csv_grammar, 'csvfile', ws='\t ', debug=debug)
# Creating parse tree out of textual input
test_data = open(os.path.join(current_dir, 'test_data.csv'), 'r').read()
parse_tree = parser.parse(test_data)
# Create list of lists using visitor
csv_content = visit_parse_tree(parse_tree, CSVVisitor())
print("This is a list of lists with the data from CSV file.")
pp = pprint.PrettyPrinter(indent=4)
pp.pprint(csv_content)
def main(debug=False):
# Load program
current_dir = os.path.dirname(__file__)
input_program = open(os.path.join(current_dir, 'program.rbt'), 'r').read()
# First we will make a parser - an instance of the robot parser model.
# Parser model is given in the form of python constructs therefore we
# are using ParserPython class.
parser = ParserPython(robot, debug=debug)
# We create a parse tree out of textual input
parse_tree = parser.parse(input_program)
# visit_parse_tree will start semantic analysis.
# In this case semantic analysis will evaluate expression and
# returned value will be the final position of the robot.
result = visit_parse_tree(parse_tree, RobotVisitor(debug=debug))
if debug:
print("position = ", result)
def main(debug=False):
# First we will make a parser - an instance of the calc parser model.
# Parser model is given in the form of python constructs therefore we
# are using ParserPython class.
parser = ParserPython(calc, debug=debug)
# An expression we want to evaluate
input_expr = "-(4-1)*5+(2+4.67)+5.89/(.2+7)"
# We create a parse tree out of textual input_expr
parse_tree = parser.parse(input_expr)
result = visit_parse_tree(parse_tree, CalcVisitor(debug=debug))
# Check that result is valid
assert (result - -7.51194444444) < 0.0001
# visit_parse_tree will start semantic analysis.
# In this case semantic analysis will evaluate expression and
# returned value will be evaluated result of the input_expr expression.
print("{} = {}".format(input_expr, result))
"""Simple Command line Interface."""
import arpeggio
# from . import common
import common
from common_interpreter import CommonInterpreter
def parse(instruction):
"""Parse vim instruction."""
def new_rule():
return (
arpeggio.ZeroOrMore([
common.string,
common.unsigned_float,
common.signed_float,
common.unsigned_integer,
common.signed_integer,]),
arpeggio.EOF)
parser = arpeggio.ParserPython(new_rule, ignore_case=True)
return parser.parse(instruction)
if __name__ == "__main__":
while True:
# pylint: disable = invalid-name
code = input("> ")
# print(code)
parse_tree = parse(code)
interpreted_parse_tree = arpeggio.visit_parse_tree(parse_tree, CommonInterpreter())
print(interpreted_parse_tree)
def parseWord(cls, word):
word = filter_chars(handle_special_chars(word.lower()))
parse_tree = wordParser.parse(word)
wordObj = visit_parse_tree(parse_tree, cls())
wordObj.word = word
return wordObj
def __call__(self, s):
try:
return visit_parse_tree(self.parser.parse(s), self.CalcVisitor(debug=False))
except Exception as e:
# print(e)
return None
def tagName(name):
tree = parser.parse(name)
parsedSeq = visit_parse_tree(tree, Visitor(defaults=False,debug=False))
return parsedSeq
return not children[1]
else:
return not all(children)
def visit_expression(self, node, children):
if len(children) == 1:
result = children[0]
else:
result = any(children)
return result
def visit_neg_expression(self, node, children):
if len(children) == 2:
return not children[1]
else:
return not any(children)
if __name__ == '__main__':
debug = False
query_grammar = open('query.peg').read()
parser = ParserPEG(query_grammar, "query", debug=debug)
input_expr = '"python" and ( "developer" or "programmer")'
parse_tree = parser.parse(input_expr)
result = visit_parse_tree(parse_tree, QueryVisitor(debug=debug, title='python developer'))
print(result)
result = visit_parse_tree(parse_tree, QueryVisitor(debug=debug, title='java developer'))
print(result)
print("Term = {}".format(term))
return term
def visit_expression(self, node, children):
"""
Adds or substracts terms.
Term nodes will be already evaluated.
"""
if self.debug:
print("Expression {}".format(children))
expr = children[0]
for i in range(2, len(children), 2):
if i and children[i - 1] == "-":
expr -= children[i]
else:
expr += children[i]
if self.debug:
print("Expression = {}".format(expr))
return expr
parser = ParserPython(calc, debug=True)
input_expr = "-(4-1)*5+(2+4.67)+5.89/(.2+7)"
parse_tree = parser.parse(input_expr)
result = visit_parse_tree(parse_tree, CalcVisitor(debug=True))
print(result - -7.51194444444)
assert (result - -7.51194444444) < 0.0001
print("{} = {}".format(input_expr, result))
def analyze_history(ast): return visit_parse_tree(ast, HistVisitor())
def language_from_str(language_def, metamodel):
"""
Constructs parser and initializes metamodel from language description
given in textX language.
Args:
language_def (str): A language description in textX.
metamodel (TextXMetaModel): A metamodel to initialize.
Returns:
Parser for the new language.
"""
if type(language_def) is not text:
raise TextXError("textX accepts only unicode strings.")
if metamodel.debug:
metamodel.dprint("*** PARSING LANGUAGE DEFINITION ***")
# Check the cache for already conctructed textX parser
if metamodel.debug in textX_parsers:
parser = textX_parsers[metamodel.debug]
else:
# Create parser for TextX grammars using
# the arpeggio grammar specified in this module
parser = ParserPython(textx_model, comment_def=comment,
ignore_case=False,
reduce_tree=False,
memoization=metamodel.memoization,
debug=metamodel.debug,
file=metamodel.file)
# Cache it for subsequent calls
textX_parsers[metamodel.debug] = parser
# Parse language description with textX parser
try:
parse_tree = parser.parse(language_def)
except NoMatch as e:
line, col = parser.pos_to_linecol(e.position)
raise TextXSyntaxError(text(e), line, col)
# Construct new parser and meta-model based on the given language
# description.
lang_parser = visit_parse_tree(parse_tree,
TextXVisitor(parser, metamodel))
# Meta-model is constructed. Validate its semantics.
metamodel.validate()
# Here we connect meta-model and language parser for convenience.
lang_parser.metamodel = metamodel
metamodel._parser_blueprint = lang_parser
if metamodel.debug:
# Create dot file for debuging purposes
PMDOTExporter().exportFile(
lang_parser.parser_model,
"{}_parser_model.dot".format(metamodel.rootcls.__name__))
return lang_parser
