class String(str):
def __init__(self, string):
self.exprs = None
def parse(self, flags):
if self.exprs is None:
self.exprs = Exprs(str(self))
return self.exprs.expand(flags)
class StringWithUseFlags(str):
""" A parsed string with support for use flags. """
def __init__(self, string):
self.exprs = None
def parse(self, flags):
if self.exprs is None:
self.exprs = Exprs(str(self))
return self.exprs.expand(flags)
def check_parses_to(string, ast):
assert Exprs(string).ast == ast
def check_expand(string, flags, expansion):
assert Exprs(string).expand(flags) == expansion
def check_parse_error(string):
with pytest.raises(ValueError) as err:
Exprs(string)
assert "Invalid syntax for string:" in str(err.value)
def parse(self, flags):
if self.exprs is None:
self.exprs = Exprs(str(self))
return self.exprs.expand(flags)
