37 lines
669 B
Go
37 lines
669 B
Go
package builtins
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import (
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"monkey/object"
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"monkey/typing"
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)
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import "strconv"
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// Int ...
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func Int(args ...object.Object) object.Object {
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if err := typing.Check(
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"int", args,
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typing.ExactArgs(1),
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); err != nil {
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return newError(err.Error())
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}
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switch arg := args[0].(type) {
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case *object.Boolean:
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if arg.Value {
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return &object.Integer{Value: 1}
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}
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return &object.Integer{Value: 0}
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case *object.Integer:
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return arg
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case *object.String:
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n, err := strconv.ParseInt(arg.Value, 10, 64)
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if err != nil {
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return newError("could not parse string to int: %s", err)
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}
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return &object.Integer{Value: n}
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default:
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return &object.Integer{}
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}
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}
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