class Builder(object):
def __init__(self, debug=False, optimize=False):
self.debug, self.optimize = debug, optimize
self.parser = parser(debug=debug, optimize=optimize)
def parse(self, input):
lexer = Lexer().build(debug=self.debug, optimize=self.optimize,
lextab='cm.lexer.output.lextab')
try:
return self.parser.parse(input, lexer=lexer, debug=self.debug)
except SyntaxError as e:
raise convert(e, self.context)
def preparse(self, string):
string = comment.sub(subcomment, string)
return string + ('' if string.endswith('\n') else '\n')
def build(self, string, context=None):
self.indent = 0
self.context = context
self.stream = Stream(self.parse(self.preparse(string)))
return File(*list(self.statements()))
def statements(self):
while True:
line = self.stream.next()
line.context = self.context
if isinstance(line, EmptyLine):
line.indentation = self.indent
if line.indentation > self.indent:
raise ConversionError('Unexpected indent at %s' % repr(line))
elif line.indentation < self.indent:
self.stream.backstep()
raise StopIteration
line.subparse(self)
yield line
def parse_body(self):
self.indent += 1
statements = list(self.statements())
self.indent -= 1
return statements
def build(self, string, context=None):
self.indent = 0
self.context = context
self.stream = Stream(self.parse(self.preparse(string)))
return File(*list(self.statements()))