def get_sql_grammar():
'''
Creates a grammar for parsing SQL queries.
Returns:
MatchFirst: SQL parser.
'''
select = pp.Regex('select', flags=re.I) \
.setParseAction(lambda s, l, t: 'select') \
.setResultsName('operator')
from_ = pp.Suppress(pp.Regex('from', flags=re.I))
table = (from_ + pp.Regex('[a-z]+', flags=re.I)) \
.setParseAction(lambda s, l, t: t[0]) \
.setResultsName('table')
regex = pp.Regex('~|regex').setParseAction(lambda s, l, t: '~')
not_regex = pp.Regex('!~|not regex').setParseAction(lambda s, l, t: '!~')
any_op = pp.Regex('[^ ]*')
operator = pp.Or([not_regex, regex, any_op]).setResultsName('operator')
quote = pp.Suppress(pp.Optional("'"))
value = (quote + pp.Regex('[^\']+', flags=re.I) + quote) \
.setResultsName('value') \
.setParseAction(lambda s, l, t: t[0])
columns = pp.delimitedList(pp.Regex('[^, ]*'), delim=pp.Regex(', *')) \
.setResultsName('display_columns')
column = pp.Regex('[a-z]+', flags=re.I).setResultsName('column')
conditional = column + operator + value
head = select + columns + table
grammar = head | conditional
return grammar
def _MakeReactionSideParser():
"""Builds a parser for a side of a reaction."""
# Coefficients are usually integral, but they can be floats or fractions too.
int_coeff = pyparsing.Word(pyparsing.nums)
float_coeff = pyparsing.Word(pyparsing.nums + '.' + pyparsing.nums)
frac_coeff = int_coeff + '/' + int_coeff
int_coeff.setParseAction(lambda i:int(i[0]))
float_coeff.setParseAction(lambda t:float(t[0]))
frac_coeff.setParseAction(lambda f:float(f[0])/float(f[2]))
coeff = pyparsing.Or([int_coeff, float_coeff, frac_coeff])
optional_coeff = pyparsing.Optional(coeff)
compound_separator = pyparsing.Literal('+').suppress()
compound_name_component = pyparsing.Word(pyparsing.alphanums + "()",
pyparsing.alphanums + "-+,()'_")
compound_name = pyparsing.Forward()
compound_name << (compound_name_component + pyparsing.ZeroOrMore(compound_name_component))
compound_name.setParseAction(lambda s: ' '.join(s))
compound_with_coeff = pyparsing.Forward()
compound_with_coeff << ((optional_coeff + compound_name) | compound_name)
compound_with_coeff.setParseAction(_parsedCompound)
compound_with_coeff.setResultsName("compound")
compound_with_separator = pyparsing.Forward()
compound_with_separator << (compound_with_coeff + compound_separator)
reaction_side = pyparsing.Forward()
reaction_side << (pyparsing.ZeroOrMore(compound_with_separator) +
compound_with_coeff)
reaction_side.setParseAction(lambda l: [l])
reaction_side.setResultsName("reaction_side")
return reaction_side
def test_none_name2(self):
grammar = pp.Or(["foo", "bar"]) + pp.Word(pp.nums).setName("integer")
railroad = to_railroad(grammar)
assert len(railroad) == 2
assert railroad[0].name is not None
railroad = to_railroad(grammar, show_results_names=True)
assert len(railroad) == 2
def expression_parser():
"""A function returning a (pyparsing) parser for parsing C expressions.
Returns:
a (pyparsing) parser for parsing C expressions.
"""
precedence = []
for operators, arity, associativity in _PRECEDENCE:
if arity <= 2:
operators = pyparsing.Or(map(pyparsing.Literal, operators))
else:
operators = tuple(map(pyparsing.Literal, operators))
precedence.append((
operators,
arity,
associativity,
_construct_operator(arity),
))
expression = pyparsing.Forward()
# pylint: disable=expression-not-assigned
expression << pyparsing.infixNotation(
baseExpr=_base_or_array_expression(expression),
opList=precedence,
lpar=pyparsing.NoMatch(),
rpar=pyparsing.NoMatch(),
)
expression.ignore(pyparsing.cppStyleComment)
return expression
def _get_anchor(flag=False):
"""Get anchor parser element.
:param bool flag: toggle debug messages on/off
anchor = "#", heading_text | "top";
:returns: anchor
:rtype: ParserElement
"""
try:
heading_text = layout.get_heading_text(flag=flag)
top = pyparsing.Literal("top")
anchor = pyparsing.Combine(
pyparsing.Literal("#")
+ pyparsing.Or((heading_text, top))
)
anchor.leaveWhitespace()
anchor.parseWithTabs()
if flag:
anchor.setDebug()
anchor.setName("anchor")
anchor = anchor.setResultsName("anchor")
except Exception as exception:
msg = "failed to get anchor parser element:{}".format(exception)
raise RuntimeError(msg)
return anchor
def __init__(self, prompt=None, intro=None):
"""
Initialize Cmd members.
Args:
prompt (str): The command-line prompt to display
intro (str): The program introduction banner
Returns:
Nothing
"""
super().__init__(allow_cli_args=False, allow_redirection=False)
self.prompt = prompt
self.intro = intro
self.commentGrammars = pyparsing.Or(
[]) # No C or Python comment parsing please
self.redirector = "\x01"
self.allow_redirection = False
self.locals_in_py = False
# set_use_arg_list(True)
# set_strip_quotes(True)
self.del_defaultcmds()
# Initialize Cli members
self.tsuite = TestSuite()
self.subcmds = list(self.tsuite.keys())
self.subcmds.sort()
self.runp = argparse.ArgumentParser(
prog="run",
description="Executes a plugin (test case)",
add_help=False)
self.runp.add_argument(
"plugin", help="The plugin to execute along with its arguments")
def _compile_alternative(self, element, src_state, dst_state, grammar,
kaldi_rule, fst):
matchers = []
for child in element.children:
matchers.append(
self.compile_element(child, src_state, dst_state, grammar,
kaldi_rule, fst))
return pp.Or(tuple(matchers))
def build_attribute_parser():
quoted = pp.Or(pp.QuotedString('"'), pp.QuotedString("'"))
colon = pp.Literal(':').suppress()
attribute_name = pp.Word(pp.srange('[a-z]'), pp.srange('[a-z0-9_]')).setResultsName('name')
data_type = pp.Combine(pp.Word(pp.alphas) + pp.SkipTo("#", ignore=quoted)).setResultsName('type')
default = pp.Literal('=').suppress() + pp.SkipTo(colon, ignore=quoted).setResultsName('default')
comment = pp.Literal('#').suppress() + pp.restOfLine.setResultsName('comment')
return attribute_name + pp.Optional(default) + colon + data_type + comment
def asdict(string, delim = ','):
"""Return dictionary from given string in ini format."""
if string.strip() == '': return {}
import pyparsing
pp_num = pyparsing.Word(pyparsing.nums + '.')
pp_str = pyparsing.quotedString
pp_bool = pyparsing.Or(
pyparsing.Word("True") | pyparsing.Word("False"))
pp_key = pyparsing.Word(pyparsing.alphas + "_",
pyparsing.alphanums + "_.")
pp_val = pyparsing.Or(pp_num | pp_str | pp_bool)
# try dictionary dialect "<key> = <value>, ..."
pp_term = pyparsing.Group(pp_key + '=' + pp_val)
pp_term_lists = pp_term + pyparsing.ZeroOrMore(delim + pp_term)
try: list = pp_term_lists.parseString(string.strip('{}'))
except: list = None
# try dictionary dialect "'<key>': <value>, ..."
if list == None:
pp_term = pyparsing.Group(pp_str + ':' + pp_val)
pp_term_lists = pp_term + pyparsing.ZeroOrMore(delim + pp_term)
try: list = pp_term_lists.parseString(string.strip('{}'))
except: return {}
# create dictionary
dictionary = {}
for item in list:
if len(item) == 1:
if item[0] == ',': continue
dictionary[item] = True
continue
try:
key = item[0].strip('\'\"')
value = eval(item[2])
except: continue
dictionary[key] = value
if isinstance(dictionary[key], str):
dictionary[key] = dictionary[key].strip()
return dictionary
def _get_complete_expression(
self,
name_for_expression_after_equal: str) -> pyparsing.ParserElement:
''' helper that returns the same pyparsing expression but with a different 'name'
for the part after the equal sign
for types, the part after the `=` is the abstract class that the type extends
for functions, the part after the `=` is the result type
'''
# everything in a line that is past the initial 'name' of the class/type that is being defined
pe_params_list_equal_sign_and_extends_from = \
self.pe_zero_or_more_params + \
self.pe_equal_sign_literal.suppress() + \
self.pe_class_name(name_for_expression_after_equal) + \
self.pe_semicolon_literal
# the full line definition for a line that is describing a tdlib type/class (aka not a comment)
pe_full_line_tdlib_type_def = \
self.pe_tdlib_class_name + \
pe_params_list_equal_sign_and_extends_from
# set parser action to add a 'note' that this is a `DEFINITION` line
pe_full_line_tdlib_type_def.addParseAction(
self._setTlLineTypeStringParseAction(
model.TlFileLineType.DEFINITION))
# set parser action to add the line and column numbers
pe_full_line_tdlib_type_def.addParseAction(
self._setLineAndLineNumberParseAction)
pe_full_comment_line = \
self.pe_comment_literal + \
pyparsing.restOfLine(constants.RESULT_NAME_COMMENT_TEXT)
# set parser action to add a 'note' that this is a `COMMENT` line
pe_full_comment_line.addParseAction(
self._setTlLineTypeStringParseAction(model.TlFileLineType.COMMENT))
# set parser action to add the line and column numbers
pe_full_comment_line.addParseAction(
self._setLineAndLineNumberParseAction)
to_return = \
pyparsing.ZeroOrMore(
pyparsing.Group(
pyparsing.Or(
[pe_full_line_tdlib_type_def,
pe_full_comment_line]
)
)
)
return to_return
def _compile_list_ref(self, element, src_state, dst_state, grammar, kaldi_rule, fst):
# list_rule_name = "__list_%s" % element.list.name
if element.list not in grammar.lists:
# Should only happen during initial compilation; during updates, we must skip this
grammar.add_list(element.list)
self.kaldi_rules_by_listreflist_dict[id(element.list)].add(kaldi_rule)
matchers = []
for child_str in element.list.get_list_items():
matchers.append(self._compile_literal(MockLiteral(child_str.split()), src_state, dst_state, grammar, kaldi_rule, fst))
return pp.Or(tuple(matchers))
def _MakeReactionParser():
"""Builds a pyparsing-based recursive descent parser for chemical reactions."""
reaction_side = _MakeReactionSideParser()
side_separators = [pyparsing.Literal(s) for s in POSSIBLE_REACTION_ARROWS]
side_separator = pyparsing.Or(side_separators).suppress()
reaction = pyparsing.Forward()
reaction << (reaction_side + side_separator + reaction_side)
return reaction
def parse(self, atom, named_formula):
result = self.bnf.parseString(atom)
result = {'name': result['name'], 'vars': list(result.get('vars', []))}
if result['name'] in self.all_atoms:
raise PieceNameError
FormulaGrammar(self.all_atoms, pp.Or([pp.Literal(var) for var in result['vars']]))\
.bnf.parseString(named_formula, True)
return result
def parse_turbo_gradient(path):
results = {}
gradient_fn = glob.glob(os.path.join(path, "gradient"))
if not gradient_fn:
raise Exception("gradient file not found!")
assert(len(gradient_fn) == 1)
gradient_fn = gradient_fn[0]
with open(gradient_fn) as handle:
text = handle.read()
float_ = make_float_class()
cycle = pp.Word(pp.nums).setResultsName("cycle")
scf_energy = float_.setResultsName("scf_energy")
grad_norm = float_.setResultsName("grad_norm")
float_line = float_ + float_ + float_
coord_line = pp.Group(float_line + pp.Word(pp.alphas))
grad_line = pp.Group(float_line)
cart_grads = pp.Literal("cartesian gradients")
energy_type = pp.Or((pp.Literal("SCF energy"),
pp.Literal("ex. state energy"),
pp.Literal("CC2 energy"),
pp.Literal("ADC(2) energy"),
pp.Literal("MP2 energy"),
))
parser = (
pp.Or((pp.Literal("$grad"), pp.Literal("$gradient"))) + pp.Optional(cart_grads) +
pp.Literal("cycle =") + cycle +
energy_type + pp.Literal("=") + scf_energy +
pp.Literal("|dE/dxyz| =") + grad_norm +
pp.OneOrMore(coord_line).setResultsName("coords") +
pp.OneOrMore(grad_line).setResultsName("grad") +
pp.Literal("$end")
)
parsed = parser.parseString(text)
gradient = np.array(parsed["grad"].asList()).flatten()
results["energy"] = parsed["scf_energy"]
results["forces"] = -gradient
return results
def compile_attribute(line, in_key=False):
"""
Convert attribute definition from DataJoint format to SQL
:param line: attribution line
:param in_key: set to True if attribute is in primary key set
:returns: (name, sql) -- attribute name and sql code for its declaration
"""
quoted = pp.Or(pp.QuotedString('"'), pp.QuotedString("'"))
colon = pp.Literal(':').suppress()
attribute_name = pp.Word(pp.srange('[a-z]'),
pp.srange('[a-z0-9_]')).setResultsName('name')
data_type = pp.Combine(pp.Word(pp.alphas) +
pp.SkipTo("#", ignore=quoted)).setResultsName(
'type')
default = pp.Literal('=').suppress() + pp.SkipTo(
colon, ignore=quoted).setResultsName('default')
comment = pp.Literal('#').suppress() + pp.restOfLine.setResultsName(
'comment')
attribute_parser = attribute_name + pp.Optional(
default) + colon + data_type + comment
match = attribute_parser.parseString(line + '#', parseAll=True)
match['comment'] = match['comment'].rstrip('#')
if 'default' not in match:
match['default'] = ''
match = {k: v.strip() for k, v in match.items()}
match['nullable'] = match['default'].lower() == 'null'
literals = ['CURRENT_TIMESTAMP'] # not to be enclosed in quotes
if match['nullable']:
if in_key:
raise DataJointError(
'Primary key attributes cannot be nullable in line %s' % line)
match[
'default'] = 'DEFAULT NULL' # nullable attributes default to null
else:
if match['default']:
quote = match['default'].upper(
) not in literals and match['default'][0] not in '"\''
match['default'] = ('NOT NULL DEFAULT ' +
('"%s"' if quote else "%s") % match['default'])
else:
match['default'] = 'NOT NULL'
match['comment'] = match['comment'].replace(
'"', '\\"') # escape double quotes in comment
sql = ('`{name}` {type} {default}' +
(' COMMENT "{comment}"' if match['comment'] else '')).format(
**match)
return match['name'], sql
def definePackagePattern(self):
first = pp.Word(pp.alphas+"_", exact=1)
rest = pp.Word(pp.alphanums+"_")
identifier = first+pp.Optional(rest)
digit = pp.Word(pp.nums, exact=1)
nonzero_digit = pp.Word(pp.nums, exact=1, excludeChars=['0'])
nonnegative_digits = pp.Or([digit, nonzero_digit+pp.Word(pp.nums)])
user = channel = identifier
letterdigit = pp.Word(pp.alphanums, exact=1)
library = pp.Combine(letterdigit + pp.Word(pp.alphanums+"-"+"_"))
rc = pp.Combine(pp.Literal('-rc')+'-'+nonnegative_digits)
alpha = pp.Combine(pp.Literal('-alpha')+'-'+nonnegative_digits)
beta = pp.Combine(pp.Literal('-beta')+'-'+nonnegative_digits)
version = pp.Combine(nonnegative_digits+'.'+nonnegative_digits+ pp.Optional('.'+nonnegative_digits)+
pp.Optional('.'+nonnegative_digits)+pp.Optional(pp.Or([rc, alpha, beta])))
user_channel = pp.Or([user+'/'+channel, pp.Literal('PROJECT')])
package = pp.Combine(library.setResultsName('name')+'/'+version.setResultsName('version')+'@'+ user_channel)
quote_package = pp.Combine('"'+package+'"')
return quote_package
def get_pos_classifiers(self):
"""
Generates a dictionary of part-of-speech classifier expressions for pyparsing
based on the locale vocabulary tables.
"""
# TODO: in the future, we may need contextual recognition using perturbational
# elements for words which can appear in several parts of speech. This may
# be necessary in highly analytic languages (e.g. Chinese).
#
# The idea would be to vary the recognition for each word matched, and
# try multiple parses on a sentence until a good match is made.
#
# However, in very small vocabularies, collisions are unlikely, and this
# is a pretty complicated idea, so I'm not going to try it until it's
# needed.
# Two main problems:
# 1) Find all the words of a given PoS and create a big "OR" expression
# 2) For each element of the "OR", tolerate inflections as minimally as possibly
# FIXME: should load using define_classifiers first, then overload.
self.pos_match = {}
pos_initial = self.grammar.define_classifiers()
for i,pos in enumerate(PoS.Syms):
self.pos_match[pos] = pos_initial[i]
for pos in PoS.Syms:
vocabulary_glosses = []
for concept in self.concepts[PoS.Sym2Grp[pos]].values():
vocabulary_glosses.extend(concept)
# print vocabulary_glosses
gloss_expressions = []
for gloss in vocabulary_glosses:
gloss_expressions.append(
self._adapt_match_expression(
self.grammar.define_inflections(pos, gloss)))
inflected_match = pyparsing.Or(gloss_expressions)
if not self.pos_match[pos]:
full_match = inflected_match
elif not inflected_match:
full_match = self.pos_match[pos]
else:
full_match = self.pos_match[pos] ^ inflected_match
#print PoS.Sym2Abr[pos], full_match
full_match.setName(PoS.Sym2Abr[pos].capitalize())
self.pos_match[pos] = full_match
def get_grammar():
punctuation = pp.Word(".,:;()/")
word_no_angle_bracket = pp.Word(pp.printables, excludeChars="<>")
html_tag = pp.Combine(
pp.Optional(punctuation)
+ "<"
+ pp.delimitedList(word_no_angle_bracket, delim=" ", combine=True)
+ ">"
+ pp.Optional(punctuation)
)
word_no_backtick = pp.Word(pp.printables, excludeChars="`")
code = pp.Combine(
pp.Optional(punctuation)
+ "`"
+ pp.delimitedList(word_no_backtick, delim=" ", combine=True)
+ "`"
+ pp.Optional(punctuation)
)
word = pp.Or( word_no_backtick | word_no_angle_bracket)
words = pp.delimitedList(word, delim=" ", combine=True)
token_ = pp.Or(html_tag | code | word)
bullet = pp.Combine("*" + pp.White() + token_)
heading = pp.Combine(
pp.OneOrMore("#")
+ pp.OneOrMore(" ")
+ pp.delimitedList(token_, delim=" ", combine=True)
)
token = pp.Or(heading | bullet | token_)
cfg = token[1, ...]
return cfg
def parse(s):
code = pp.Forward()
opcode = pp.Or([
pp.Literal('+'),
pp.Literal('-'),
pp.Literal('*'),
pp.Literal('/'),
pp.Literal('_'),
pp.Literal('='),
pp.Literal('>'),
pp.Literal('&'),
pp.Literal('|'),
pp.Literal('~'),
pp.Literal('$'),
pp.Literal('%'),
pp.Literal('\\'),
pp.Literal('@'),
pp.Literal('ø'),
pp.Literal('p'),
pp.Literal(':'),
pp.Literal(';'),
pp.Literal('!'),
pp.Literal('?'),
pp.Literal('#'),
]).setParseAction(lambda toks: ast.Opcode(toks[0]))
number = (pp.Word('1234567890').setParseAction(
lambda toks: ast.Number(int(toks[0]))))
str_def = ((pp.Literal('"') + pp.SkipTo(pp.Literal('"'), include=True)
).setParseAction(lambda toks: ast.String(toks[1])))
varname = (pp.Word(
'qwertyuiopasdfghjklzxcvbnm',
exact=1).setParseAction(lambda toks: ast.Varname(toks[0])))
fn_def = pp.Suppress(pp.Literal('[')) + code + pp.Suppress(pp.Literal(']'))
expr = pp.Or([opcode, number, varname, str_def, fn_def])
atom = pp.Or([expr])
code << pp.ZeroOrMore(atom)
code.setParseAction(lambda toks: ast.Function(toks))
return code.parseString(s)[0]
def __foreign_key_parser(database):
def paste_database(unused1, unused2, toc):
return ['`{database}`.`{table}`'.format(database=database, table=toc[0])]
return (pp.CaselessLiteral('CONSTRAINT').suppress() +
pp.QuotedString('`').suppress() +
pp.CaselessLiteral('FOREIGN KEY').suppress() +
pp.QuotedString('(', endQuoteChar=')').setResultsName('attributes') +
pp.CaselessLiteral('REFERENCES') +
pp.Or([
pp.QuotedString('`').setParseAction(paste_database),
pp.Combine(pp.QuotedString('`', unquoteResults=False) + '.' +
pp.QuotedString('`', unquoteResults=False))]).setResultsName('referenced_table') +
pp.QuotedString('(', endQuoteChar=')').setResultsName('referenced_attributes'))
def _make_matcher_element(self):
# Handle the case where use_current_match is True.
if self.use_current_match is True:
current_match = self.current_match
if current_match is None:
result = pyparsing.NoMatch()
elif current_match == "":
result = pyparsing.Empty()
else:
result = pyparsing.Literal(self.current_match)
# Set the element's attributes and return it.
return self._set_matcher_element_attributes(result)
# Otherwise build a list of next possible literals. Make the required stack
# of child-parent pairs.
stack = []
p1, p2 = self, self.parent
while p1 and p2:
stack.append((p1, p2))
# Move both pivots further up the tree.
p1 = p1.parent
p2 = p2.parent
# Build a list of next literals using the stack.
next_literals, _ = _collect_next_literals(stack, 0, True, False)
# De-duplicate the list.
next_literals = set(next_literals)
word = pyparsing.Regex(_word_regex_str, re.UNICODE)
if next_literals:
# Check if there is a next dictation literal. If there is, only match
# one word for this expansion.
if _word_regex_str in next_literals:
result = word
# Otherwise build an element to match one or more words stopping on
# any of the next literals so that they aren't matched as dictation.
else:
next_literals = list(map(pyparsing.Literal, next_literals))
result = pyparsing.OneOrMore(
word, stopOn=pyparsing.Or(next_literals))
else:
# Handle the case of no literals ahead by allowing one or more Unicode
# words without restrictions.
result = pyparsing.OneOrMore(word)
return self._set_matcher_element_attributes(result)
def timeentry_expr():
# fmt:off
start_time = (
pp.Word(pp.nums) +
pp.Optional(":" + pp.Word(pp.nums))).setResultsName("first_time")
end_time = (
pp.Word(pp.nums) +
pp.Optional(":" + pp.Word(pp.nums))).setResultsName("last_time")
interval_h = pp.Word(pp.nums).setResultsName("hours") + pp.Char("h")
interval_m = pp.Word(pp.nums).setResultsName("minutes") + pp.Char("m")
timepart = pp.Or([
start_time + pp.Char("-") + end_time,
pp.Or([interval_h, interval_m, interval_h + interval_m])
])
timeseppart = pp.Optional(pp.Char('|:-'))
tagpart = (pp.Char('[') +
pp.CharsNotIn('[]').setResultsName("tag", listAllMatches=True) +
pp.Char(']'))
descpart = pp.SkipTo(pp.lineEnd).setResultsName("desc")
return timepart + timeseppart + pp.OneOrMore(tagpart) + descpart
def rhs_value_p():
Ipv4Address = Combine(Word(nums) +
('.' + Word(nums)) * 3).setResultsName('ipv4')
Ipv4Address = Ipv4Address.setParseAction(lambda s, l, toks: toks[0])
Int = Word(nums)
Int = Int.setParseAction(lambda s, l, toks: int(toks[0]))
Float = Combine(Word(nums) + '.' + Word(nums)).setResultsName('float')
Float = Float.setParseAction(lambda s, l, toks: float(toks[0]))
String = quotedString.copy().addParseAction(pyparsing.removeQuotes)
rhs = pyparsing.Or([String, Int, Float, Ipv4Address])
return rhs
def __init__(self, language):
"""Initializes a `Parser` instance.
Args:
language: Instance of `Language`. Used to determine the different
predicate / constant / variable symbols appearing.
"""
self._language = language
predicate_symbol = pyparsing.oneOf(language.predicates +
[FALSE_SYMBOL, TRUE_SYMBOL])
constant_symbol = pyparsing.oneOf(language.constants)
variable_symbol = pyparsing.oneOf(language.variables)
left_par = pyparsing.Literal('(').suppress()
right_par = pyparsing.Literal(')').suppress()
formula = pyparsing.Forward()
relation_expressions = self._relation_expressions(
predicate_symbol, pyparsing.Or([constant_symbol, variable_symbol]))
formula_without_op = pyparsing.Forward()
negated_formula_without_op = (pyparsing.Literal('~').suppress() +
formula_without_op)
negated_formula_without_op.setParseAction(
lambda args: self._op(args, NEGATION_SYMBOL))
formula_without_op <<= pyparsing.MatchFirst(
[left_par + formula + right_par] + relation_expressions +
[negated_formula_without_op])
binary_expressions = self._binary_expressions(formula_without_op,
formula)
negation = pyparsing.Literal('~').suppress() + formula
negation.setParseAction(lambda args: self._op(args, NEGATION_SYMBOL))
for_all = (pyparsing.Literal('all').suppress() + variable_symbol +
pyparsing.Literal('.').suppress() + formula)
for_all.setParseAction(lambda args: self._op(args, FOR_ALL_SYMBOL))
exists = (pyparsing.Literal('exists').suppress() + variable_symbol +
pyparsing.Literal('.').suppress() + formula)
exists.setParseAction(lambda args: self._op(args, EXISTS_SYMBOL))
formula <<= pyparsing.MatchFirst(binary_expressions + [negation] +
[for_all, exists, formula_without_op])
self._expression = formula
def _build_precedence(self, precedence_table):
# C's & dereference operator.
precedence = []
for operators, arity, associativity in precedence_table:
operators = [pyparsing.Literal(x) for x in operators]
if arity in [_UNARY, _BINARY]:
operators = pyparsing.Or(operators)
precedence.append((
operators,
arity,
associativity,
self._construct_operator(arity),
))
return precedence
def _setup_parser():
arg_prefix = pp.Literal('-')
arg_prefix2 = pp.Literal('--')
arg_name = pp.Word(pp.alphanums)
non_shell_chars = pp.alphanums + ':/*%_'
arg_value = pp.Word(non_shell_chars)
argument = (
pp.Or([arg_prefix, arg_prefix2]) + arg_name + pp.ZeroOrMore(arg_value))
argument.setParseAction(
lambda tokens: (tokens[0] + tokens[1], tuple(tokens[2:])))
argument_list = pp.ZeroOrMore(argument)
return argument_list
def __init__(self):
element = pyparsing.oneOf(ELEMENTS)
coeff = pyparsing.Word(pyparsing.nums)
optional_coeff = pyparsing.Optional(coeff)
element_and_count = pyparsing.Forward()
element_and_count << (element + optional_coeff)
element_and_count.setParseAction(self.HandleElementAndCount)
n_block = pyparsing.Forward()
n_block << ('(' + pyparsing.OneOrMore(element_and_count) + ')n')
n_block.setParseAction(self.HandleNBlock)
element_or_block = pyparsing.Or([element_and_count, n_block])
self.formula_parser = pyparsing.OneOrMore(element_or_block)
self.formula_re = re.compile(r'\(?([A-Z][a-z]?)([0-9]*)(\)n)?')
def as_pp_parser(self) -> pp.ParserElement:
pos_args = [i.pp_parser for i in self.pos_args] + [rest_parser.copy()]
opt_args = [i.pp_parser for i in self.opt_args]
if opt_args:
optionals = pp.Or(opt_args)
args = intersperse_parser(pos_args, optionals)
else:
args = pp.And(pos_args)
args.setParseAction(update_dict)
cw = pp.CaselessKeyword(
self.command_word)("command").setParseAction(lambda x: self.func)
if self.add_help:
args = (self.help_arg.pp_parser
| args).setParseAction(lambda x: x[0])
return (cw + args("options")).streamline()
def get_internal_link(namespaces, flag=False):
"""Get internal link parser element.
internal_link =
"[[", [ [ namespace ], ":" ], ( anchor | page_name, [ anchor ] ),
[ "|", [ link_text ] ], "]]", [ word_ending ];
:param list namespaces: namespaces
:param bool flag: toggle debug messages on/off
:returns: internal link
:rtype: ParserElement
"""
try:
internal_link_opening = pyparsing.Literal("[[")
namespace = _get_namespace(namespaces, flag=flag)
colon = pyparsing.Literal(":")
page_name = _get_page_name(flag=flag)
anchor = _get_anchor(flag=flag)
pipe = pyparsing.Literal("|")
link_text = _get_link_text(flag=flag)
internal_link_closing = pyparsing.Literal("]]")
word_ending = _get_word_ending(flag=flag)
internal_link = pyparsing.Combine(
internal_link_opening
+ pyparsing.Optional(pyparsing.Optional(namespace) + colon)
+ pyparsing.Or(
(
anchor,
pyparsing.Combine(page_name + pyparsing.Optional(anchor))
)
)
+ pyparsing.Optional(pipe + pyparsing.Optional(link_text))
+ internal_link_closing
+ pyparsing.Optional(word_ending)
)
internal_link.leaveWhitespace()
internal_link.parseWithTabs()
if flag:
internal_link.setDebug()
internal_link.setName("internal_link")
internal_link = internal_link.setResultsName("internal_link")
except Exception as exception:
msg = "failed to return internal link:{}".format(exception)
raise RuntimeError(msg)
return internal_link
class Record(Node):
"""
Single standalone entry of `pactl list`.
The record is composed of a name and a list of attributes. Pulseaudio
exposes objects such as cards, sinks and sources as separate records.
Each attribute may be of a different type. Some attributes are simple
values while others have finer structure, including lits and even
additional recursive attributes.
"""
__fragments__ = {
'name': 'record-name',
'attribute_list': lambda t: t['record-attributes'].asList(),
'attribute_map': lambda t: OrderedDict(
(attr.name, attr)
for attr in t['record-attributes'].asList()),
}
__syntax__ = (
p.LineStart()
+ p.NotAny(p.White(' \t'))
+ p.Regex("[A-Z][a-zA-Z ]+ #[0-9]+").setResultsName("record-name")
+ p.LineEnd().suppress()
+ p.OneOrMore(
p.Or([
GenericListAttribute.Syntax,
GenericSimpleAttribute.Syntax,
])
).setResultsName("record-attributes")
).setResultsName("record")
def as_json(self):
return {
'name': self.name,
'attribute_list': self.attribute_list,
}
def __repr__(self):
# Custom __repr__ that skips attribute_map
return "{}({})".format(
type(self).__name__, ", ".join([
"{}={!r}".format(attr, getattr(self, attr))
for attr in ['name', 'attribute_list']]))
