def generate(inputfilename, outputfilename='', dump=0, **flags):
"""Generate a grammar, given an input filename (X.g)
and an output filename (defaulting to X.py)."""
if not outputfilename:
if inputfilename.endswith('.g'):
outputfilename = inputfilename[:-2] + '.py'
else:
raise Exception(
'Must specify output filename if input filename is not *.g')
DIVIDER = '\n%%\n' # This pattern separates the pre/post parsers
preparser, postparser = None, None # Code before and after the parser desc
# Read the entire file
s = open(inputfilename, 'r').read()
# See if there's a separation between the pre-parser and parser
f = s.find(DIVIDER)
if f >= 0: preparser, s = s[:f] + '\n\n', s[f + len(DIVIDER):]
# See if there's a separation between the parser and post-parser
f = s.find(DIVIDER)
if f >= 0: s, postparser = s[:f], '\n\n' + s[f + len(DIVIDER):]
# Create the parser and scanner and parse the text
scanner = grammar.ParserDescriptionScanner(s, filename=inputfilename)
if preparser: scanner.del_line += preparser.count('\n')
parser = grammar.ParserDescription(scanner)
t = runtime.wrap_error_reporter(parser, 'Parser')
if t is None: return 1 # Failure
if preparser is not None: t.preparser = preparser
if postparser is not None: t.postparser = postparser
# Check the options
for f in t.options.keys():
for opt, _, _ in yapps_options:
if f == opt: break
else:
print >> sys.stderr, 'Warning: unrecognized option', f
# Add command line options to the set
for f in flags.keys():
t.options[f] = flags[f]
# Generate the output
if dump:
t.dump_information()
else:
t.output = open(outputfilename, 'w')
t.generate_output()
return 0
def generate(inputfilename, outputfilename='', dump=0, **flags):
"""Generate a grammar, given an input filename (X.g)
and an output filename (defaulting to X.py)."""
if not outputfilename:
if inputfilename.endswith('.g'):
outputfilename = inputfilename[:-2] + '.py'
else:
raise Exception('Must specify output filename if input filename is not *.g')
DIVIDER = '\n%%\n' # This pattern separates the pre/post parsers
preparser, postparser = None, None # Code before and after the parser desc
# Read the entire file
s = open(inputfilename,'r').read()
# See if there's a separation between the pre-parser and parser
f = s.find(DIVIDER)
if f >= 0: preparser, s = s[:f]+'\n\n', s[f+len(DIVIDER):]
# See if there's a separation between the parser and post-parser
f = s.find(DIVIDER)
if f >= 0: s, postparser = s[:f], '\n\n'+s[f+len(DIVIDER):]
# Create the parser and scanner and parse the text
scanner = grammar.ParserDescriptionScanner(s, filename=inputfilename)
if preparser: scanner.del_line += preparser.count('\n')
parser = grammar.ParserDescription(scanner)
t = runtime.wrap_error_reporter(parser, 'Parser')
if t is None: return 1 # Failure
if preparser is not None: t.preparser = preparser
if postparser is not None: t.postparser = postparser
# Check the options
for f in t.options.keys():
for opt,_,_ in yapps_options:
if f == opt: break
else:
print >>sys.stderr, 'Warning: unrecognized option', f
# Add command line options to the set
for f in flags.keys(): t.options[f] = flags[f]
# Generate the output
if dump:
t.dump_information()
else:
t.output = open(outputfilename, 'w')
t.generate_output()
return 0
def parse(rule, text):
P = ParserDescription(ParserDescriptionScanner(text))
return runtime.wrap_error_reporter(P, rule)
def parse(rule, text):
P = ParserDescription(ParserDescriptionScanner(text))
return runtime.wrap_error_reporter(P, rule)