def normal_wrapup(fn_word_params, fn_word_offset, args, last_arg, tuple_offset,
has_ellipsis, lineno, lexpos):
print >> Output_file, " args = []"
for arg in args: print >> Output_file, " " + arg
if fn_word_params is None:
if not has_ellipsis and len(args) == 1:
print >> Output_file, " p[0] = args[0]"
else:
print >> Output_file, " p[0] = tuple(args)"
else:
if fn_word_params:
output("""
p[0] = ast.ast.from_parser(
scanner_init.get_syntax_position_info(p),
$kw_args, *args)
""",
output_file = Output_file,
target_indent = 4,
kw_args = ', '.join("%s=%s" %
(key, value % {'offset': fn_word_offset})
for key, value in fn_word_params))
elif fn_word_offset is None:
scanner_init.syntaxerror(
"empty parameter list on nonterminal declaration",
lineno = lineno, lexpos = lexpos)
else:
output("""
p[0] = ast.ast.from_parser(
scanner_init.get_syntax_position_info(p),
p[$offset], *args)
""",
output_file = Output_file,
target_indent = 4,
offset = fn_word_offset)
def p_parameterized_word(p):
''' parameterized_word : simple_word param_list
'''
rule_text, type, offset, prep_code, params = p[1]
if params:
scanner_init.syntaxerror("duplicate initialization parameters",
lineno=p.lineno(2), lexpos=p.lexpos(2))
param_list = p[2]
p[0] = rule_text, 'fn_word', offset, prep_code, param_list
def gen_alternatives(rule_name, alternatives, wrapup_fn, param_list = None):
for words, lineno, lexpos in alternatives:
p_fn_name = crud.gensym('p_' + rule_name)
output("""
def $fn_name(p):
r''' $rule_name : $production
'''
""",
output_file = Output_file,
fn_name = p_fn_name, rule_name = rule_name,
production = ' '.join(word[0] for word in words))
prep = []
args = []
last_arg = None
tuple_offset = None
has_ellipsis = False
if param_list is not None:
fn_word_params = param_list
fn_word_offset = None
else:
fn_word_params = None
fn_word_offset = None
for i, (rule_text, type, offset, prep_code, params) in enumerate(words):
if prep_code: prep.append(prep_code % {'offset': offset + i + 1})
if type == 'fn_word':
if fn_word_params is not None:
scanner_init.syntaxerror(
"duplicate function words in production",
lineno = lineno, lexpos = lexpos)
fn_word_offset = offset + i + 1
fn_word_params = params
else:
assert not params, "non function word has parameters"
if type == 'ignore':
pass
elif type == 'single_arg':
args.append('args.append(p[%d])' % (offset + i + 1))
last_arg = offset + i + 1
elif type == 'tuple':
args.append('args.append(p[%d])' % (offset + i + 1))
if tuple_offset is not None:
if not has_ellipsis:
tuple_offset = 'dup'
else:
tuple_offset = i
elif type == 'ellipsis':
args.append('args.extend(p[%d])' % (offset + i + 1))
has_ellipsis = True
if prep:
print >> Output_file, '\n'.join(' ' + p for p in prep)
wrapup_fn(fn_word_params, fn_word_offset, args, last_arg, tuple_offset,
has_ellipsis, lineno, lexpos)
print >> Output_file
def wrapup_tuple(fn_word_params, fn_word_offset, args, last_arg, tuple_offset,
has_ellipsis, lineno, lexpos):
if fn_word_params is not None:
print >> Output_file, " args = []"
for arg in args: print >> Output_file, " " + arg
if fn_word_params:
output("""
p[0] = (ast.ast.from_parser(
scanner_init.get_syntax_position_info(p),
$kw_args, *args),)
""",
output_file = Output_file,
target_indent = 4,
kw_args = ', '.join("%s=%s" %
(key, value % {'offset': fn_word_offset})
for key, value in fn_word_params))
else:
output("""
p[0] = (ast.ast.from_parser(
scanner_init.get_syntax_position_info(p),
p[$offset], *args),)
""",
output_file = Output_file,
target_indent = 4,
offset = fn_word_offset)
elif has_ellipsis:
scanner_init.syntaxerror(
"ellipsis in production without function word",
lineno = lineno, lexpos = lexpos)
elif tuple_offset == 'dup':
scanner_init.syntaxerror("duplicate tuples in production",
lineno = lineno, lexpos = lexpos)
elif tuple_offset is None:
# Make a singleton tuple out of a single argument.
if len(args) == 1:
print >> Output_file, " args = []"
print >> Output_file, ' ' + args[0]
print >> Output_file, " p[0] = tuple(args)"
else:
scanner_init.SyntaxError("no tuple in production")
else:
print >> Output_file, " p[0] = p[%d]" % (tuple_offset + 1)