def testVarOps(self):
ev = InitEvaluator() # initializes x=xxx and y=yyy
unset_sub = braced_var_sub(Tok(Id.VSub_Name, 'unset'))
part_vals = []
ev._EvalWordPart(unset_sub, part_vals)
print(part_vals)
set_sub = braced_var_sub(Tok(Id.VSub_Name, 'x'))
part_vals = []
ev._EvalWordPart(set_sub, part_vals)
print(part_vals)
# Now add some ops
part = Tok(Id.Lit_Chars, 'default')
arg_word = compound_word([part])
test_op = suffix_op.Unary(Id.VTest_ColonHyphen, arg_word)
unset_sub.suffix_op = test_op
set_sub.suffix_op = test_op
part_vals = []
ev._EvalWordPart(unset_sub, part_vals)
print(part_vals)
part_vals = []
ev._EvalWordPart(set_sub, part_vals)
print(part_vals)
def _ParseVarOf(self):
# type: () -> braced_var_sub
"""
VarOf = NAME Subscript?
| NUMBER # no subscript allowed, none of these are arrays
# ${@[1]} doesn't work, even though slicing does
| VarSymbol
"""
self._Peek()
name_token = self.cur_token
self._Next(lex_mode_e.VSub_2)
self._Peek() # Check for []
if self.token_type == Id.VOp2_LBracket:
bracket_op = self._ReadSubscript()
else:
bracket_op = None
part = braced_var_sub(name_token)
part.bracket_op = bracket_op
return part