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use crate::{Arg, ArgSettings, ValueHint};
pub(crate) fn assert_arg(arg: &Arg) {
debug!("Arg::_debug_asserts:{}", arg.name);
assert!(
!arg.blacklist.iter().any(|x| *x == arg.id),
"Argument '{}' cannot conflict with itself",
arg.name,
);
if arg.value_hint != ValueHint::Unknown {
assert!(
arg.is_set(ArgSettings::TakesValue),
"Argument '{}' has value hint but takes no value",
arg.name
);
if arg.value_hint == ValueHint::CommandWithArguments {
assert!(
arg.is_set(ArgSettings::MultipleValues),
"Argument '{}' uses hint CommandWithArguments and must accept multiple values",
arg.name
)
}
}
if arg.index.is_some() {
assert!(
arg.is_positional(),
"Argument '{}' is a positional argument and can't have short or long name versions",
arg.name
);
}
if arg.is_set(ArgSettings::Required) {
assert!(
arg.default_vals.is_empty(),
"Argument '{}' is required and can't have a default value",
arg.name
);
}
assert_arg_flags(arg);
}
fn assert_arg_flags(arg: &Arg) {
use ArgSettings::*;
macro_rules! checker {
($a:ident requires $($b:ident)|+) => {
if arg.is_set($a) {
let mut s = String::new();
$(
if !arg.is_set($b) {
s.push_str(&format!(" ArgSettings::{} is required when ArgSettings::{} is set.\n", std::stringify!($b), std::stringify!($a)));
}
)+
if !s.is_empty() {
panic!("Argument {:?}\n{}", arg.get_name(), s)
}
}
}
}
checker!(ForbidEmptyValues requires TakesValue);
checker!(RequireDelimiter requires TakesValue | UseValueDelimiter);
checker!(HidePossibleValues requires TakesValue);
checker!(AllowHyphenValues requires TakesValue);
checker!(RequireEquals requires TakesValue);
checker!(Last requires TakesValue);
checker!(HideDefaultValue requires TakesValue);
checker!(MultipleValues requires TakesValue);
checker!(IgnoreCase requires TakesValue);
checker!(AllowInvalidUtf8 requires TakesValue);
}