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ferret/pkg/stdlib/collections/length.go

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package collections
import (
"context"
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"github.com/MontFerret/ferret/pkg/runtime/collections"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
"github.com/MontFerret/ferret/pkg/runtime/values/types"
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)
func Length(_ context.Context, inputs ...core.Value) (core.Value, error) {
err := core.ValidateArgs(inputs, 1, 1)
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if err != nil {
return values.None, err
}
value := inputs[0]
c, ok := value.(collections.Collection)
if !ok {
return values.None, core.TypeError(value.Type(),
types.String,
types.Array,
types.Object,
types.HTMLElement,
types.HTMLDocument,
types.Binary,
core.NewType("Collection"),
)
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}
return c.Length(), nil
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}