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arg_settings.rs
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arg_settings.rs
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#![allow(deprecated)]
// Std
use std::ops::BitOr;
// Third party
use bitflags::bitflags;
#[allow(unused)]
use crate::Arg;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(crate) struct ArgFlags(Flags);
impl Default for ArgFlags {
fn default() -> Self {
ArgFlags(Flags::TAKES_VAL)
}
}
/// Various settings that apply to arguments and may be set, unset, and checked via getter/setter
/// methods [`Arg::setting`], [`Arg::unset_setting`], and [`Arg::is_set`]. This is what the
/// [`Arg`] methods which accept a `bool` use internally.
///
/// [`Arg`]: crate::Arg
/// [`Arg::setting`]: crate::Arg::setting()
/// [`Arg::unset_setting`]: crate::Arg::unset_setting()
/// [`Arg::is_set`]: crate::Arg::is_set()
#[derive(Debug, PartialEq, Copy, Clone)]
#[non_exhaustive]
pub(crate) enum ArgSettings {
Required,
MultipleValues,
Global,
Hidden,
TakesValue,
UseValueDelimiter,
NextLineHelp,
RequireDelimiter,
HidePossibleValues,
AllowHyphenValues,
RequireEquals,
Last,
HideDefaultValue,
IgnoreCase,
#[cfg(feature = "env")]
HideEnv,
#[cfg(feature = "env")]
HideEnvValues,
HiddenShortHelp,
HiddenLongHelp,
Exclusive,
}
bitflags! {
struct Flags: u32 {
const REQUIRED = 1;
const GLOBAL = 1 << 3;
const HIDDEN = 1 << 4;
const TAKES_VAL = 1 << 5;
const USE_DELIM = 1 << 6;
const NEXT_LINE_HELP = 1 << 7;
const REQ_DELIM = 1 << 9;
const DELIM_NOT_SET = 1 << 10;
const HIDE_POS_VALS = 1 << 11;
const ALLOW_TAC_VALS = 1 << 12;
const REQUIRE_EQUALS = 1 << 13;
const LAST = 1 << 14;
const HIDE_DEFAULT_VAL = 1 << 15;
const CASE_INSENSITIVE = 1 << 16;
#[cfg(feature = "env")]
const HIDE_ENV_VALS = 1 << 17;
const HIDDEN_SHORT_H = 1 << 18;
const HIDDEN_LONG_H = 1 << 19;
const MULTIPLE_VALS = 1 << 20;
#[cfg(feature = "env")]
const HIDE_ENV = 1 << 21;
const EXCLUSIVE = 1 << 23;
const NO_OP = 0;
}
}
impl_settings! { ArgSettings, ArgFlags,
Required => Flags::REQUIRED,
MultipleValues => Flags::MULTIPLE_VALS,
Global => Flags::GLOBAL,
Hidden => Flags::HIDDEN,
TakesValue => Flags::TAKES_VAL,
UseValueDelimiter => Flags::USE_DELIM,
NextLineHelp => Flags::NEXT_LINE_HELP,
RequireDelimiter => Flags::REQ_DELIM,
HidePossibleValues => Flags::HIDE_POS_VALS,
AllowHyphenValues => Flags::ALLOW_TAC_VALS,
RequireEquals => Flags::REQUIRE_EQUALS,
Last => Flags::LAST,
IgnoreCase => Flags::CASE_INSENSITIVE,
#[cfg(feature = "env")]
HideEnv => Flags::HIDE_ENV,
#[cfg(feature = "env")]
HideEnvValues => Flags::HIDE_ENV_VALS,
HideDefaultValue => Flags::HIDE_DEFAULT_VAL,
HiddenShortHelp => Flags::HIDDEN_SHORT_H,
HiddenLongHelp => Flags::HIDDEN_LONG_H,
Exclusive => Flags::EXCLUSIVE
}
#[cfg(test)]
mod test {
use super::*;
use crate::Arg;
#[test]
fn setting() {
let m = Arg::new("setting").setting(ArgSettings::Required);
assert!(m.is_required_set());
}
#[test]
fn unset_setting() {
let m = Arg::new("unset_setting").setting(ArgSettings::Required);
assert!(m.is_required_set());
let m = m.unset_setting(ArgSettings::Required);
assert!(!m.is_required_set(), "{:#?}", m);
}
#[test]
fn setting_bitor() {
let m = Arg::new("setting_bitor")
.setting(ArgSettings::Required | ArgSettings::Hidden | ArgSettings::Last);
assert!(m.is_required_set());
assert!(m.is_hide_set());
assert!(m.is_last_set());
}
#[test]
fn unset_setting_bitor() {
let m = Arg::new("unset_setting_bitor")
.setting(ArgSettings::Required)
.setting(ArgSettings::Hidden)
.setting(ArgSettings::Last);
assert!(m.is_required_set());
assert!(m.is_hide_set());
assert!(m.is_last_set());
let m = m.unset_setting(ArgSettings::Required | ArgSettings::Hidden | ArgSettings::Last);
assert!(!m.is_required_set(), "{:#?}", m);
assert!(!m.is_hide_set(), "{:#?}", m);
assert!(!m.is_last_set(), "{:#?}", m);
}
}