Struct Preferences 

pub struct Preferences {
    pub strict_pinning: Bool<true>,
    pub forbid_new_install: Bool,
    pub forbid_remove: Bool,
    pub solver: Option<String>,
    pub preferences: Option<String>,
}

Encapsulates the preference fields in a Request stanza.

Fields

strict_pinning: Bool<true>

When set to Bool::YES, APT pinning is strict, i.e. the solver must not propose to install packages which are not APT candidates¹. When set to Bool::NO, the solver does only a best effort attempt to install APT candidates. Defaults to Bool::YES.

---

1. See Package::pin and Package::candidate. ↩

forbid_new_install: Bool

When set to Bool::YES the resolver is forbidden to install new packages in its returned solution. Defaults to Bool::NO.

forbid_remove: Bool

When set to Bool::YES the resolver is forbidden to remove currently installed packages in its returned solution. Defaults to Bool::NO.

solver: Option<String>

A purely informational string specifying the solver to which this request was initially sent.

preferences: Option<String>

A solver-specific preferences string, usually coming from the APT::Solver::Preferences APT configuration option.

Trait Implementations

impl Debug for Preferences

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

Formats the value using the given formatter.

impl Default for Preferences

fn default() -> Preferences

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Preferences

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Preferences

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Serialize for Preferences

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Preferences

impl StructuralPartialEq for Preferences