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ferret/pkg/stdlib/collections/length.go
2018-10-07 01:07:44 -04:00

34 lines
648 B
Go

package collections
import (
"context"
"github.com/MontFerret/ferret/pkg/runtime/collections"
"github.com/MontFerret/ferret/pkg/runtime/core"
"github.com/MontFerret/ferret/pkg/runtime/values"
)
func Length(_ context.Context, inputs ...core.Value) (core.Value, error) {
err := core.ValidateArgs(inputs, 1, 1)
if err != nil {
return values.None, err
}
value := inputs[0]
err = core.ValidateType(
value,
core.StringType,
core.ArrayType,
core.ObjectType,
core.HTMLElementType,
core.HTMLDocumentType,
core.BinaryType,
)
if err != nil {
return values.None, err
}
return value.(collections.Collection).Length(), nil
}