def parse_rule(text, start_pos, start_vals):
while True:
pos, vals = start_pos, start_vals
pos, vals = parse_id(text, pos, vals)
if pos is None: break
m = re.match('=', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse__(text, pos, vals)
if pos is None: break
vals += ('def parse_',)
vals = metalib.swap(vals)
vals += ('(text, start_pos, start_vals):',)
vals = metalib.nl(vals)
pos, vals = parse_alts(text, pos, vals)
if pos is None: break
m = re.match('\\.', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse__(text, pos, vals)
if pos is None: break
vals += (' return None, None',)
vals = metalib.nl(vals)
return pos, vals
return None, None
def parse_alts(text, start_pos, start_vals):
while True:
pos, vals = start_pos, start_vals
vals += (' while True:',)
vals = metalib.nl(vals)
vals += (' pos, vals = start_pos, start_vals',)
vals = metalib.nl(vals)
pos, vals = parse_seq(text, pos, vals)
if pos is None: break
pos, vals = parse_alts2(text, pos, vals)
if pos is None: break
return pos, vals
return None, None
def parse_seq(text, start_pos, start_vals):
while True:
pos, vals = start_pos, start_vals
pos, vals = parse_token(text, pos, vals)
if pos is None: break
pos, vals = parse_seq(text, pos, vals)
if pos is None: break
return pos, vals
while True:
pos, vals = start_pos, start_vals
vals += (' return pos, vals',)
vals = metalib.nl(vals)
return pos, vals
return None, None
def parse_main(text, start_pos, start_vals):
while True:
pos, vals = start_pos, start_vals
vals += ("# This file was generated by metatoo; you probably shouldn't edit it.",)
vals = metalib.nl(vals)
vals += ('import metalib, re',)
vals = metalib.nl(vals)
vals += ('def parse(text):',)
vals = metalib.nl(vals)
vals += (' pos, vals = parse_main(text, 0, ())',)
vals = metalib.nl(vals)
vals += (" if pos != len(text): raise Exception('Failed', pos)",)
vals = metalib.nl(vals)
vals += (" return ''.join(vals)",)
vals = metalib.nl(vals)
pos, vals = parse__(text, pos, vals)
if pos is None: break
pos, vals = parse_rules(text, pos, vals)
if pos is None: break
return pos, vals
return None, None
def parse_token(text, start_pos, start_vals):
while True:
pos, vals = start_pos, start_vals
m = re.match('{', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse_qchars(text, pos, vals)
if pos is None: break
m = re.match('}', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse__(text, pos, vals)
if pos is None: break
vals += (' vals += (',)
vals = metalib.swap(vals)
vals = metalib.quote(vals)
vals += (',)',)
vals = metalib.nl(vals)
return pos, vals
while True:
pos, vals = start_pos, start_vals
m = re.match('\\/', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse_xchars(text, pos, vals)
if pos is None: break
m = re.match('\\/', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse__(text, pos, vals)
if pos is None: break
vals += (' m = re.match(',)
vals = metalib.swap(vals)
vals = metalib.quote(vals)
vals += (', text[pos:])',)
vals = metalib.nl(vals)
vals += (' if not m: break',)
vals = metalib.nl(vals)
vals += (' pos, vals = pos + m.end(), vals + m.groups()',)
vals = metalib.nl(vals)
return pos, vals
while True:
pos, vals = start_pos, start_vals
pos, vals = parse_id(text, pos, vals)
if pos is None: break
vals += (' pos, vals = parse_',)
vals = metalib.swap(vals)
vals += ('(text, pos, vals)',)
vals = metalib.nl(vals)
vals += (' if pos is None: break',)
vals = metalib.nl(vals)
return pos, vals
while True:
pos, vals = start_pos, start_vals
m = re.match(':', text[pos:])
if not m: break
pos, vals = pos + m.end(), vals + m.groups()
pos, vals = parse_id(text, pos, vals)
if pos is None: break
vals += (' vals = metalib.',)
vals = metalib.swap(vals)
vals += ('(vals)',)
vals = metalib.nl(vals)
return pos, vals
return None, None
