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28 lines
537 B
Go
28 lines
537 B
Go
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package objects
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func builtinFormat(args ...Object) (Object, error) {
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numArgs := len(args)
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if numArgs == 0 {
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return nil, ErrWrongNumArguments
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}
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format, ok := args[0].(*String)
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if !ok {
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return nil, ErrInvalidArgumentType{
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Name: "format",
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Expected: "string",
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Found: args[0].TypeName(),
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}
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}
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if numArgs == 1 {
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return format, nil // okay to return 'format' directly as String is immutable
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}
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s, err := Format(format.Value, args[1:]...)
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if err != nil {
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return nil, err
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}
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return &String{Value: s}, nil
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}
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