22 lines
405 B
Go
22 lines
405 B
Go
package builtins
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import (
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"monkey/internal/object"
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"monkey/internal/typing"
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"strings"
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)
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// Lower ...
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func Lower(args ...object.Object) object.Object {
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if err := typing.Check(
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"lower", args,
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typing.ExactArgs(1),
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typing.WithTypes(object.STRING_OBJ),
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); err != nil {
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return newError(err.Error())
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}
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str := args[0].(*object.String)
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return &object.String{Value: strings.ToLower(str.Value)}
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}
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