def convert_command(tokens):
matches = [('de', ), ('ate', ), (
'a',
'cada',
), (NEWLINE, ), (':', )]
iterator = token.token_find(tokens, matches)
tokens = funct_iter(iterator, tokens)
return tokens
def process_repetir_command(self, tokens):
"""
Converts command::
repetir <N> vezes:
<BLOCO>
or::
repita <N> vezes:
<BLOCO>
to::
for ___ in range(<N>):
<BLOCO>
"""
matches = [('repetir',), ('repita',), ('vezes',), (NEWLINE,)]
iterator = token.token_find(tokens, matches)
for idx, match, start, end in iterator:
# Send tokens to the beginning of the equivalent "for" loop
starttokens = Token.from_strings(
tokens[idx].start, 'for', '___', 'in', 'range', '('
)
del tokens[idx]
token.insert_tokens_at(tokens, idx, starttokens, end=end)
# Matches the 'vezes' token
try:
idx, match, start, end = next(iterator)
except StopIteration:
match = [None]
if match[0] != 'vezes':
raise SyntaxError(
'comando repetir malformado na linha %s.\n'
' Espera comando do tipo\n\n'
' repetir <N> vezes:\n'
' <BLOCO>\n\n'
' Palavra chave "vezes" está faltando!' % (start.lineno)
)
else:
tokens[idx] = Token(')', start=start)
token.displace_tokens(tokens[idx + 1:], -4)
return tokens
def process_de_ate_command(self, tokens):
"""
Converts command::
de <X> até <Y> [a cada <Z>]
to::
in range(<X>, <Y> + 1[, <Z>])
"""
matches = [('de', ), ('ate', ), (
'a',
'cada',
), (NEWLINE, ), (':', )]
iterator = token.token_find(tokens, matches)
for idx, match, start, end in iterator:
# Waits for a 'de' token to start processing
if match[0] != 'de':
continue
# Send tokens for the beginning of the equivalent in range(...)
# test
start = tokens[idx].start
starttokens = Token.from_strings(start, 'in', 'range', '(')
del tokens[idx]
token.insert_tokens_at(tokens, idx, starttokens, end=end)
# Matches the 'até' token and insert a comma separator
idx, match, start, end = next(iterator)
if match[0] in ['até', 'ate']:
token.displace_tokens(tokens[idx:], -3)
tokens[idx] = Token(',', start=tokens[idx - 1].end)
else:
raise SyntaxError('comando para cada malformado na linha %s.\n'
' Espera comando do tipo\n\n'
' para cada <x> de <a> até <b>:\n'
' <BLOCO>\n\n'
' Palavra chave "até" está faltando!' %
(start.lineno))
idx, match, start, end = next(iterator)
# Matches "a cada" or the end of the line
if match == ('a', 'cada'):
middletokens = Token.from_strings(start, '+', '1', ',')
del tokens[idx:idx + 2]
token.insert_tokens_at(tokens, idx, middletokens, end=end)
# Proceed to the end of the line
idx, match, start, end = next(iterator)
if match[0] not in (NEWLINE, ':'):
raise SyntaxError('comando malformado na linha %s.\n'
' Espera um ":" no fim do bloco' %
(start.lineno))
endtok = Token(')', start=start)
token.displace_tokens(tokens[idx:], 1)
tokens.insert(idx, endtok)
# Finish command
elif match[0] in (NEWLINE, ':'):
token.displace_tokens(tokens[idx:], 1)
endtokens = Token.from_strings(start, '+', '1', ')')
token.insert_tokens_at(tokens, idx, endtokens, end=end)
# Unexpected token
else:
raise SyntaxError('comando malformado na linha %s.\n'
' Espera um ":" no fim do bloco' %
(start.lineno))
return tokens