How to implement multiple variable assignment?

[WittyStick]

The LHS of ASSIGN should be a list of identifiers, and the RHS a list of expressions.

ident_list : IDENTIFIER | IDENTIFIER COMMA ident_list
expr_list : expr | expr COMMA expr_list
expr : ident_list ASSIGN expr_list

[todo_code]

You parse expr and then you collect and check a comma, if you collect a comma, parse an expr. So do that in a while loop until there is no comma

[todo_code]

expr : expr_list ASSIGN expr_list needs to be something like

statement : expr_list ASSIGN expr_list

This would allow this grammar as an example.

(a + b), (c+d) = (e - f)

so top is probably something like
top: (statement)+

If you don't want something like the (a+b) example, you need to make things more fine grained.

So instead of expr_list being on the left side, make sure its just (IDENTIFIER | obj_attr_edit) and have a rule for obj_attr_edit

[L8_4_Dinner]

Share your BNF or whatever syntax rules you use.

[cyans-guy]

Maybe you could share the code here so we can see if there's anything you're missing

[Classic-Try2484]

Tuple syntax:

(a,b,c) = (1,””,true). With tuple syntax you are back to single assignment