Enum ReqOfSource 

pub enum ReqOfSource {
    DeclaredNone,
    Declared,
    HeaderOnlyInference,
    CompiledNoDeclaration,
    CrossLanguageDefault,
}

Spec D9: which row of the declaration-to-requirement table produced a ReqOf value. Provenance-tracking callers (the effective-requirement composition of D10) record this alongside the requirement so a diagnostic can say why a target imposes what it imposes; the rows are the routing of D9, so this enum is derived here and nowhere else.

Variants

DeclaredNone

Row 1: the explicit interface declaration "none".

Declared

Row 2: an explicit declared interface minimum.

HeaderOnlyInference

Row 3: header-only inference from the implementation standard.

CompiledNoDeclaration

Row 4: a compiled target without an interface declaration imposes no constraint.

CrossLanguageDefault

Rows 5-6: the cross-language default - permissive (unconstrained) toward C++, strict (forbidden) toward C.

Trait Implementations

impl Clone for ReqOfSource

fn clone(&self) -> ReqOfSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReqOfSource

impl Debug for ReqOfSource

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

Formats the value using the given formatter.

impl Eq for ReqOfSource

impl PartialEq for ReqOfSource

fn eq(&self, other: &ReqOfSource) -> 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 ReqOfSource