Struct BinderSlot 

pub struct BinderSlot {
    pub wire: String,
    pub lvalue_type: PortType,
    pub allow_fusion: bool,
}

One slot in a binder.

wire names the polydat wire that supplies the value at execute time (bare wire name, resolved through the kernel’s Polydat context). lvalue_type is what the protocol expects at this binding site — typically obtained from adapter-side introspection (CQL: column type from prepared-statement metadata).

allow_fusion is the per-slot policy bit the caller sets when it has license — usually from a workload-author opt-in like the bind-point :* wildcard syntax — to accept polydat type fusion at this slot. When true, the verifier skips the strict rvalue→lvalue rule for this slot and accepts any rvalue (the wire-existence check still fires; an unknown wire is always a violation). When false (the default), the strict rule applies: string-detour into a non-text-natural lvalue is rejected.

The lvalue_type field stays honest in both cases — callers don’t fake the type to Str to bypass the check; they keep the real cluster-reported type AND set allow_fusion: true. That way downstream consumers (compile-time analysis, diagnostics, future runtime-typed bind paths) see the true protocol-side type.

Fields

wire: String

The wire the slot reads.

lvalue_type: PortType

The type the protocol side requires.

allow_fusion: bool

Whether a wire of another type may be fused into the lvalue type.

Trait Implementations

impl Clone for BinderSlot

fn clone(&self) -> BinderSlot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BinderSlot

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

Formats the value using the given formatter.