Enum clap::ArgSettings

#[non_exhaustive]
pub enum ArgSettings {
    Required,
    MultipleValues,
    MultipleOccurrences,
    ForbidEmptyValues,
    Global,
    Hidden,
    TakesValue,
    UseValueDelimiter,
    NextLineHelp,
    RequireDelimiter,
    HidePossibleValues,
    AllowHyphenValues,
    RequireEquals,
    Last,
    HideDefaultValue,
    IgnoreCase,
    HideEnv,
    HideEnvValues,
    HiddenShortHelp,
    HiddenLongHelp,
    AllowInvalidUtf8,
    Exclusive,
    // some variants omitted
}

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.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Required

Deprecated, replaced with Arg::required and Arg::is_required_set

Derive: replace #[clap(setting = Required)] with #[clap(required = true)]

Builder: replace arg.setting(Required) with arg.required(true)

MultipleValues

Deprecated, replaced with Arg::multiple_values and Arg::is_multiple_values_set

Derive: replace #[clap(setting = MultipleValues)] with #[clap(multiple_values = true)]

Builder: replace arg.setting(MultipleValues) with arg.multiple_values(true)

MultipleOccurrences

Deprecated, replaced with Arg::action (Issue #3772)

ForbidEmptyValues

Deprecated, replaced with [Arg::value_parser(NonEmptyStringValueParser::new())]

Derive: replace #[clap(setting = ForbidEmptyValues)] with #[clap(value_parser = NonEmptyStringValueParser::new())]

Builder: replace arg.setting(Multiple) with arg.value_parser(NonEmptyStringValueParser::new())

Global

Deprecated, replaced with Arg::global and Arg::is_global_set

Derive: replace #[clap(setting = Global)] with #[clap(global = true)]

Builder: replace arg.setting(Global) with arg.global(true)

Hidden

Deprecated, replaced with Arg::hide and Arg::is_hide_set

Derive: replace #[clap(setting = Hidden)] with #[clap(hide = true)]

Builder: replace arg.setting(Hidden) with arg.hide(true)

TakesValue

Deprecated, replaced with Arg::takes_value and Arg::is_takes_value_set

Derive: this setting shouldn’t be needed

Builder: replace arg.setting(TakesValue) with arg.takes_value(true)

UseValueDelimiter

Deprecated, replaced with Arg::use_value_delimiter and Arg::is_use_value_delimiter_set

Derive: replace #[clap(setting = UseValueDelimiter)] with #[clap(use_value_delimiter = true)]

Builder: replace arg.setting(UseValueDelimiter) with arg.use_value_delimiter(true)

NextLineHelp

Deprecated, replaced with Arg::next_line_help and Arg::is_next_line_help_set

Derive: replace #[clap(setting = NextLineHelp)] with #[clap(next_line_help = true)]

Builder: replace arg.setting(NextLineHelp) with arg.next_line_help(true)

RequireDelimiter

Deprecated, replaced with Arg::require_value_delimiter and Arg::is_require_value_delimiter_set

Derive: replace #[clap(setting = RequireDelimiter)] with #[clap(require_value_delimiter = true)]

Builder: replace arg.setting(RequireDelimiter) with arg.require_value_delimiter(true)

HidePossibleValues

Deprecated, replaced with Arg::hide_possible_values and Arg::is_hide_possible_values_set

Derive: replace #[clap(setting = HidePossibleValues)] with #[clap(hide_possible_values = true)]

Builder: replace arg.setting(HidePossibleValues) with arg.hide_possible_values(true)

AllowHyphenValues

Deprecated, replaced with Arg::allow_hyphen_values and Arg::is_allow_hyphen_values_set

Derive: replace #[clap(setting = AllowHyphenValues)] with #[clap(allow_hyphen_values = true)]

Builder: replace arg.setting(AllowHyphenValues) with arg.allow_hyphen_values(true)

RequireEquals

Deprecated, replaced with Arg::require_equals and Arg::is_require_equals_set

Derive: replace #[clap(setting = RequireEquals)] with #[clap(require_equals = true)]

Builder: replace arg.setting(RequireEquals) with arg.require_equals(true)

Last

Deprecated, replaced with Arg::last and Arg::is_last_set

Derive: replace #[clap(setting = Last)] with #[clap(last = true)]

Builder: replace arg.setting(Last) with arg.last(true)

HideDefaultValue

Deprecated, replaced with Arg::hide_default_value and Arg::is_hide_default_value_set

Derive: replace #[clap(setting = HideDefaultValue)] with #[clap(hide_default_value = true)]

Builder: replace arg.setting(HideDefaultValue) with arg.hide_default_value(true)

IgnoreCase

Deprecated, replaced with Arg::ignore_case and Arg::is_ignore_case_set

Derive: replace #[clap(setting = IgnoreCase)] with #[clap(ignore_case = true)]

Builder: replace arg.setting(IgnoreCase) with arg.ignore_case(true)

HideEnv

Available on crate feature env only.

Deprecated, replaced with Arg::hide_env and Arg::is_hide_env_set

Derive: replace #[clap(setting = HideEnv)] with #[clap(hide_env = true)]

Builder: replace arg.setting(HideEnv) with arg.hide_env(true)

HideEnvValues

Available on crate feature env only.

Deprecated, replaced with Arg::hide_env_values and Arg::is_hide_env_values_set

Derive: replace #[clap(setting = HideEnvValues)] with #[clap(hide_env_values = true)]

Builder: replace arg.setting(HideEnvValues) with arg.hide_env_values(true)

HiddenShortHelp

Deprecated, replaced with Arg::hide_short_help and Arg::is_hide_short_help_set

Derive: replace #[clap(setting = HiddenShortHelp)] with #[clap(hide_short_help = true)]

Builder: replace arg.setting(HiddenShortHelp) with arg.hide_short_help(true)

HiddenLongHelp

Deprecated, replaced with Arg::hide_long_help and Arg::is_hide_long_help_set

Derive: replace #[clap(setting = HiddenLongHelp)] with #[clap(hide_long_help = true)]

Builder: replace arg.setting(HiddenLongHelp) with arg.hide_long_help(true)

AllowInvalidUtf8

Deprecated, replaced with Arg::value_parser

Derive: replace #[clap(setting = AllowInvalidUtf8)] with #[clap(action)] (which opts-in to the new clap v4 behavior which gets the type via value_parser!)

Builder: replace arg.setting(AllowInvalidUtf8) with arg.value_parser(value_parser!(T)) where T is the type of interest, like OsString or PathBuf, and matches.value_of_os with matches.get_one::<T> or matches.values_of_os with matches.get_many::<T>

Exclusive

Deprecated, replaced with Arg::exclusive and Arg::is_exclusive_set

Derive: replace #[clap(setting = Exclusive)] with #[clap(exclusive = true)]

Builder: replace arg.setting(Exclusive) with arg.exclusive(true)

Trait Implementations

impl BitOr<ArgSettings> for ArgSettings

type Output = ArgFlags

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation.

impl Clone for ArgSettings

fn clone(&self) -> ArgSettings

Returns a copy of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ArgSettings

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromStr for ArgSettings

Available on crate feature yaml only.

Deprecated in Issue #3087, maybe clap::Parser would fit your use case?

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, <Self as FromStr>::Err>

Parses a string s to return a value of this type.

impl PartialEq<ArgSettings> for ArgSettings

fn eq(&self, other: &ArgSettings) -> bool

This method tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ArgSettings

impl StructuralPartialEq for ArgSettings