Function FunctionBinding

common/decls/decls.go:887–898

FunctionBinding provides the implementation of a variadic overload. The provided function is protected by a runtime type-guard which ensures runtime type agreement between the overload signature and runtime argument types.

(binding functions.FunctionOp)

// FunctionBinding provides the implementation of a variadic overload. The provided function is protected by a runtime
// type-guard which ensures runtime type agreement between the overload signature and runtime argument types.
func FunctionBinding(binding functions.FunctionOp) OverloadOpt {
	return func(o *OverloadDecl) (*OverloadDecl, error) {
		if o.HasBinding() {
			return nil, fmt.Errorf("overload already has a binding: %s", o.ID())
		}
		if o.hasLateBinding {
			return nil, fmt.Errorf("overload already has a late binding: %s", o.ID())
		}
		o.functionOp = binding
		return o, nil
	}
}

// LateFunctionBinding indicates that the function has a binding which is not known at compile time.
// This is useful for functions which have side-effects or are not deterministically computable.