def lyst(self):
p_keys, opt_keys = self.head()
self._lyst = Lyst(p_keys, opt_keys)
self.items()
def lyst(self):
p_keys, opt_keys = self.head()
self._lyst = Lyst(p_keys, opt_keys)
self.items()
class Parser(object):
def __init__(self, lexer):
self.lexer = lexer
self.peek = lexer.scan()
self.peek2 = lexer.scan()
self.look = None
self._lyst = None
def move(self):
self.look = self.peek
self.peek = self.peek2
self.peek2 = self.lexer.scan()
def match(self, token):
self.move()
if self.look[0] != token:
raise ParseError('expected token %s, got %s' % (token, self.look[0]))
# lyst -> head items
def lyst(self):
p_keys, opt_keys = self.head()
self._lyst = Lyst(p_keys, opt_keys)
self.items()
# head -> key p_keys opt_keys
def head(self):
self.move()
key = self.key()
self.move()
p_keys = self.p_keys()
opt_keys = self.opt_keys()
return [key] + p_keys, opt_keys
# p_keys -> indent key p_keys | e
def p_keys(self):
keys = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String:
self.move()
keys.append(self.key())
self.move()
return keys
# opt_keys -> indent :key opt_keys | e
def opt_keys(self):
keys = []
while self.look[0] == Token.Indent and self.peek[0] == Token.Colon:
self.move()
self.move()
keys.append(self.key())
self.move()
return keys
# items -> item items | e
def items(self):
while self.look[0] != Token.EOF:
self.item()
# item -> val p_vals opt_vals
def item(self):
val = self.val()
self.move()
p_vals = [val] + self.p_vals()
opt_vals = self.opt_vals()
self._lyst.add_item(p_vals, opt_vals)
# p_vals -> indent val p_vals | e
def p_vals(self):
vals = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String and \
self.peek2[0] != Token.SuperColon:
self.move()
vals.append(self.val())
self.move()
return vals
# opt_vals -> indent key::val opt_vals | e
def opt_vals(self):
vals = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String and \
self.peek2[0] == Token.SuperColon:
self.move()
key = self.key()
self.match(Token.SuperColon)
self.move()
vals.append((key, self.val()))
self.move()
return vals
# key -> string
def key(self):
if self.look[0] == Token.String:
return self.look[1]
raise ParseError('expected %s, got %s' % (Token.String, self.look[0]))
# val -> string
def val(self):
if self.look[0] == Token.String:
return self.look[1]
raise ParseError('expected %s, got %s' % (Token.String, self.look[0]))
class Parser(object):
def __init__(self, lexer):
self.lexer = lexer
self.peek = lexer.scan()
self.peek2 = lexer.scan()
self.look = None
self._lyst = None
def move(self):
self.look = self.peek
self.peek = self.peek2
self.peek2 = self.lexer.scan()
def match(self, token):
self.move()
if self.look[0] != token:
raise ParseError('expected token %s, got %s' %
(token, self.look[0]))
# lyst -> head items
def lyst(self):
p_keys, opt_keys = self.head()
self._lyst = Lyst(p_keys, opt_keys)
self.items()
# head -> key p_keys opt_keys
def head(self):
self.move()
key = self.key()
self.move()
p_keys = self.p_keys()
opt_keys = self.opt_keys()
return [key] + p_keys, opt_keys
# p_keys -> indent key p_keys | e
def p_keys(self):
keys = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String:
self.move()
keys.append(self.key())
self.move()
return keys
# opt_keys -> indent :key opt_keys | e
def opt_keys(self):
keys = []
while self.look[0] == Token.Indent and self.peek[0] == Token.Colon:
self.move()
self.move()
keys.append(self.key())
self.move()
return keys
# items -> item items | e
def items(self):
while self.look[0] != Token.EOF:
self.item()
# item -> val p_vals opt_vals
def item(self):
val = self.val()
self.move()
p_vals = [val] + self.p_vals()
opt_vals = self.opt_vals()
self._lyst.add_item(p_vals, opt_vals)
# p_vals -> indent val p_vals | e
def p_vals(self):
vals = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String and \
self.peek2[0] != Token.SuperColon:
self.move()
vals.append(self.val())
self.move()
return vals
# opt_vals -> indent key::val opt_vals | e
def opt_vals(self):
vals = []
while self.look[0] == Token.Indent and self.peek[0] == Token.String and \
self.peek2[0] == Token.SuperColon:
self.move()
key = self.key()
self.match(Token.SuperColon)
self.move()
vals.append((key, self.val()))
self.move()
return vals
# key -> string
def key(self):
if self.look[0] == Token.String:
return self.look[1]
raise ParseError('expected %s, got %s' % (Token.String, self.look[0]))
# val -> string
def val(self):
if self.look[0] == Token.String:
return self.look[1]
raise ParseError('expected %s, got %s' % (Token.String, self.look[0]))
