def EndLiteralExpression(self, **_):
if len(self.stack) <= 1:
raise lexer.ParseError(
"Unbalanced literal sequence: Can not expand '%s'" %
self.processed_buffer)
arg = self.stack.pop(-1)
self.stack[-1] += arg
def ExpandArg(self, **_):
"""Expand the args as a section.parameter from the config."""
# This function is called when we see close ) and the stack depth has to
# exactly match the number of (.
if len(self.stack) <= 1:
raise lexer.ParseError(
"Unbalanced parenthesis: Can not expand '%s'" % self.processed_buffer)
# This is the full parameter name: e.g. Logging.path
parameter_name = self.stack.pop(-1)
if "." not in parameter_name:
parameter_name = "%s.%s" % (self.default_section, parameter_name)
final_value = self.config.Get(parameter_name, context=self.context)
if final_value is None:
final_value = ""
type_info_obj = (self.config.FindTypeInfo(parameter_name) or
type_info.String())
# Encode the interpolated string according to its type.
self.stack[-1] += type_info_obj.ToString(final_value)
def Parse(self):
self.Close()
if len(self.stack) != 1:
raise lexer.ParseError("Nested expression not balanced.")
return self.stack[0]
