Method CompileOptions

ext/lists.go:205–388

CompileOptions implements the Library interface method.

()

// CompileOptions implements the Library interface method.
func (lib listsLib) CompileOptions() []cel.EnvOption {
	listType := cel.ListType(cel.TypeParamType("T"))
	listListType := cel.ListType(listType)
	listDyn := cel.ListType(cel.DynType)
	opts := []cel.EnvOption{
		cel.Function("slice",
			cel.MemberOverload("list_slice",
				[]*cel.Type{listType, cel.IntType, cel.IntType}, listType,
				cel.FunctionBinding(func(args ...ref.Val) ref.Val {
					list := args[0].(traits.Lister)
					start := args[1].(types.Int)
					end := args[2].(types.Int)
					result, err := slice(list, start, end)
					if err != nil {
						return types.WrapErr(err)
					}
					return result
				}),
			),
		),
	}
	if lib.version >= 1 {
		opts = append(opts,
			cel.Function("flatten",
				cel.MemberOverload("list_flatten",
					[]*cel.Type{listListType}, listType,
					cel.UnaryBinding(func(arg ref.Val) ref.Val {
						// double-check as type-guards disabled
						list, ok := arg.(traits.Lister)
						if !ok {
							return types.ValOrErr(arg, "no such overload: %v.flatten()", arg.Type())
						}
						flatList, err := flatten(list, 1)
						if err != nil {
							return types.WrapErr(err)
						}

						return types.DefaultTypeAdapter.NativeToValue(flatList)
					}),
				),
				cel.MemberOverload("list_flatten_int",
					[]*cel.Type{listDyn, types.IntType}, listDyn,
					cel.BinaryBinding(func(arg1, arg2 ref.Val) ref.Val {
						// double-check as type-guards disabled
						list, ok := arg1.(traits.Lister)
						if !ok {
							return types.ValOrErr(arg1, "no such overload: %v.flatten(%v)", arg1.Type(), arg2.Type())
						}
						depth, ok := arg2.(types.Int)
						if !ok {
							return types.ValOrErr(arg1, "no such overload: %v.flatten(%v)", arg1.Type(), arg2.Type())
						}
						flatList, err := flatten(list, int64(depth))
						if err != nil {
							return types.WrapErr(err)
						}

						return types.DefaultTypeAdapter.NativeToValue(flatList)