def evaluate(self, settings, adjustment=0, exclude=()):
from line import EmptyLine
output = []
falltag = None
falldata = {}
for statement in self.statements:
if isinstance(statement, EmptyLine):
# Empty lines can not raise FallThrough and should not
# consume FallThrough data
output.append(statement.evaluate(settings))
continue
if exclude and isinstance(statement.node, exclude):
continue
if not statement.accepts(settings, falltag):
if falltag is None:
# The don't accept us sending no data
# This must be a follower-only function called alone
raise ConversionError(
'Function %s can not be called on its own.'
% statement.name)
falldata = {}
try:
result = statement.evaluate(settings, **falldata)
falltag, falldata = None, {}
except FallThrough as e:
result, falltag, falldata = e.result, e.tag, e.data
except ConversionError as e:
e.contexts.append(statement)
raise
except Exception as e:
raise convert(e, statement)
output.append(result)
return settings.join(output)
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 include(filename, settings, **context):
try:
return settings.render(filename, context)
except Exception as e:
from cm.exceptions import convert
raise convert(e, filename)