fn parse_to_bool()

in aws-lc-sys/builder/main.rs [223:242]

• 20 lines of code
• 10 McCabe index (conditional complexity)

fn parse_to_bool(env_var_value: &str) -> Option<bool> {
    let env_var_value = env_var_value.to_lowercase();
    if env_var_value.starts_with('0')
        || env_var_value.starts_with('n')
        || env_var_value.starts_with("off")
        || env_var_value.starts_with('f')
    {
        emit_warning(&format!("Value: {} is false.", &env_var_value));
        return Some(false);
    }
    if env_var_value.starts_with(|c: char| c.is_ascii_digit())
        || env_var_value.starts_with('y')
        || env_var_value.starts_with("on")
        || env_var_value.starts_with('t')
    {
        emit_warning(&format!("Value: {} is true.", &env_var_value));
        return Some(true);
    }
    None
}