<aside> 💡

Color codes:

• Tokenizer
• Expander
• Parser
• Executor </aside>

Mandatory pipeline

Bonus pipeline

➤ 3 main differences:

1. expand_all_tokens is replaced by defer_expand_tokens for conditional expansion
2. expand_wildcards is added before parsing
3. The parser’s entry point calls parse_and_or first instead of parse_pipeline

Stage by stage breakdown

1. Tokenizer tokenizer_utils_bonus.c

The bonus adds 4 operators:

is_operator(char c)

• Add &, (, ) to the recognized operator characters.

get_operator_token_type(char *str, int *len)

• Check 2 char operators first (&&, ||, >>, <<) and then, single operators
• Set *len to 2 or 1 accordingly

2. Deferred expansion expander_bonus.c

In mandatory all variables are expanded before parsing, but in bonus variables after && and || are deferred to execution.