103 lines
1.8 KiB
Go
103 lines
1.8 KiB
Go
package objects
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import (
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"strconv"
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)
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func builtinString(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 *String:
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return arg, nil
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case *Undefined:
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return UndefinedValue, nil
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default:
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return &String{Value: arg.String()}, nil
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}
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}
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func builtinInt(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 *Int:
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return arg, nil
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case *Float:
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return &Int{Value: int64(arg.Value)}, nil
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case *Char:
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return &Int{Value: int64(arg.Value)}, nil
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case *Bool:
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if arg.Value {
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return &Int{Value: 1}, nil
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}
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return &Int{Value: 0}, nil
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case *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 &Int{Value: n}, nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinFloat(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 *Float:
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return arg, nil
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case *Int:
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return &Float{Value: float64(arg.Value)}, nil
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case *String:
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f, err := strconv.ParseFloat(arg.Value, 64)
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if err == nil {
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return &Float{Value: f}, nil
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}
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}
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return UndefinedValue, nil
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}
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func builtinBool(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 *Bool:
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return arg, nil
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default:
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return &Bool{Value: !arg.IsFalsy()}, nil
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}
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}
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func builtinChar(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 *Char:
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return arg, nil
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case *Int:
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return &Char{Value: rune(arg.Value)}, nil
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case *String:
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rs := []rune(arg.Value)
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switch len(rs) {
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case 0:
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return &Char{}, nil
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case 1:
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return &Char{Value: rs[0]}, nil
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}
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}
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return UndefinedValue, nil
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}
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