30 lines
725 B
Go
30 lines
725 B
Go
package objects
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// len(obj object) => int
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func builtinLen(args ...Object) (Object, error) {
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if len(args) != 1 {
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return nil, ErrWrongNumArguments
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}
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switch arg := args[0].(type) {
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case *Array:
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return &Int{Value: int64(len(arg.Value))}, nil
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case *ImmutableArray:
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return &Int{Value: int64(len(arg.Value))}, nil
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case *String:
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return &Int{Value: int64(len(arg.Value))}, nil
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case *Bytes:
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return &Int{Value: int64(len(arg.Value))}, nil
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case *Map:
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return &Int{Value: int64(len(arg.Value))}, nil
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case *ImmutableMap:
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return &Int{Value: int64(len(arg.Value))}, nil
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default:
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return nil, ErrInvalidArgumentType{
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Name: "first",
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Expected: "array/string/bytes/map",
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Found: arg.TypeName(),
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}
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}
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}
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