Struct SourceDecl 

pub struct SourceDecl {
    pub name: Ident,
    pub provider: Ident,
    pub clock: Option<ClockPolicy>,
    pub path: Option<StringLiteral>,
    pub watch: Option<StringLiteral>,
    pub url: Option<StringLiteral>,
    pub dedup: Option<SourceValue>,
    pub observe_binding: Ident,
    pub emit: SourceEmit,
    pub span: SourceSpan,
}

A top-level source declaration: source <provider> as <name> { ... } or source clock as <name> { ... }. Lowers through the source_declaration construct family to a signal_source (generic provider) or clock_source (the clock provider) admission template (spec/std-time.md, spec/construct-grammar.md). A source admits a durable signal fact; it never fires a rule directly.

Fields

name: Ident

as <name> — the source instance name.

provider: Ident

The provider keyword (clock) or a generic provider identifier.

clock: Option<ClockPolicy>

Recurrence/timezone/missed policy; Some only for the clock provider.

path: Option<StringLiteral>

path "<file>" — file provider, line mode (exactly one of path/watch); rejected elsewhere. The file is read line-by-line; each non-empty line is admitted once as a durable signal fact (spec/std-time.md admission semantics, append-only).

watch: Option<StringLiteral>

watch "<glob>" — file provider, occurrence mode (exactly one of path/watch); rejected elsewhere (spec/std-ingress.md I2a). Each matched file is admitted once per new (path, content-hash) occurrence: a dropped file admits once, an unchanged file never re-admits, a content change re-admits. Content READING stays std.files.

url: Option<StringLiteral>

url "<url>" — required for the http provider, rejected elsewhere. The URL is GET’d and its JSON-array body admitted one element per signal, keyed by (source, element index) so re-polls are idempotent (append-only).

dedup: Option<SourceValue>

dedup <observe>.<field> — optional provider delivery-id source for file (line mode) and http sources (spec/std-ingress.md I2a): the named observation field becomes the admission key instead of the positional ordinal, so a re-ordered or head-inserted feed still admits each delivery exactly once.

observe_binding: Ident

observe as <binding> — binds the provider observation schema.

emit: SourceEmit

emit <signal> { <field> <value> ... } — maps the observation into the declared signal payload.

span: SourceSpan

Trait Implementations

impl Clone for SourceDecl

fn clone(&self) -> SourceDecl

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourceDecl

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

Formats the value using the given formatter.

impl Eq for SourceDecl

impl PartialEq for SourceDecl

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SourceDecl