Module util

General utility functions for parsing and error checking.

Functions

check_assign_target

check_for_stmt_declarators

Check if the var declaration in a for statement has multiple declarators, which is invalid

check_for_stmt_lhs

Check the LHS expression inside of a for…in or for…of statement according to

check_label_use

Check if the use of a statement label is valid and the label is defined.

check_lhs

check_simple_assign_target

Check if assignment to an expression is invalid and report an error if so.

check_var_decl_bound_names

Check the bound names of a variable declaration and issue errors according to 13.3.1.1

get_precedence

Get the precedence of a token

is_update_expr