Enum RequirementOrigin 

pub enum RequirementOrigin {
    Declared {
        site: DeclSite,
    },
    DeclaredNone {
        site: DeclSite,
    },
    HeaderOnlyInference {
        site: DeclSite,
    },
    CrossLanguageDefault,
}

Why a dependency’s effective requirement is what it is - the D9 row that originates the join, with the declaration to cite.

Variants

Declared

Row 2: an explicit interface-*-standard minimum.

Fields

site: DeclSite

DeclaredNone

Row 1: interface-*-standard = "none" - consumption from this language was disabled by the origin target’s author.

Fields

site: DeclSite

HeaderOnlyInference

Row 3: a header-only target’s minimum inferred from its implementation standard.

Fields

site: DeclSite

CrossLanguageDefault

Row 6: the strict C++-to-C default - the origin target implements no C and declares no C interface, so there is no declaration to cite.

Trait Implementations

impl Clone for RequirementOrigin

fn clone(&self) -> RequirementOrigin

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RequirementOrigin

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

Formats the value using the given formatter.

impl Eq for RequirementOrigin

impl PartialEq for RequirementOrigin

fn eq(&self, other: &RequirementOrigin) -> 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 StructuralPartialEq for RequirementOrigin