Update to tengo v2 (#976)

vendor/github.com/d5/tengo/v2/variable.go

@@ -0,0 +1,136 @@
+package tengo
+
+import (
+	"errors"
+)
+
+// Variable is a user-defined variable for the script.
+type Variable struct {
+	name  string
+	value Object
+}
+
+// NewVariable creates a Variable.
+func NewVariable(name string, value interface{}) (*Variable, error) {
+	obj, err := FromInterface(value)
+	if err != nil {
+		return nil, err
+	}
+	return &Variable{
+		name:  name,
+		value: obj,
+	}, nil
+}
+
+// Name returns the name of the variable.
+func (v *Variable) Name() string {
+	return v.name
+}
+
+// Value returns an empty interface of the variable value.
+func (v *Variable) Value() interface{} {
+	return ToInterface(v.value)
+}
+
+// ValueType returns the name of the value type.
+func (v *Variable) ValueType() string {
+	return v.value.TypeName()
+}
+
+// Int returns int value of the variable value.
+// It returns 0 if the value is not convertible to int.
+func (v *Variable) Int() int {
+	c, _ := ToInt(v.value)
+	return c
+}
+
+// Int64 returns int64 value of the variable value. It returns 0 if the value
+// is not convertible to int64.
+func (v *Variable) Int64() int64 {
+	c, _ := ToInt64(v.value)
+	return c
+}
+
+// Float returns float64 value of the variable value. It returns 0.0 if the
+// value is not convertible to float64.
+func (v *Variable) Float() float64 {
+	c, _ := ToFloat64(v.value)
+	return c
+}
+
+// Char returns rune value of the variable value. It returns 0 if the value is
+// not convertible to rune.
+func (v *Variable) Char() rune {
+	c, _ := ToRune(v.value)
+	return c
+}
+
+// Bool returns bool value of the variable value. It returns 0 if the value is
+// not convertible to bool.
+func (v *Variable) Bool() bool {
+	c, _ := ToBool(v.value)
+	return c
+}
+
+// Array returns []interface value of the variable value. It returns 0 if the
+// value is not convertible to []interface.
+func (v *Variable) Array() []interface{} {
+	switch val := v.value.(type) {
+	case *Array:
+		var arr []interface{}
+		for _, e := range val.Value {
+			arr = append(arr, ToInterface(e))
+		}
+		return arr
+	}
+	return nil
+}
+
+// Map returns map[string]interface{} value of the variable value. It returns
+// 0 if the value is not convertible to map[string]interface{}.
+func (v *Variable) Map() map[string]interface{} {
+	switch val := v.value.(type) {
+	case *Map:
+		kv := make(map[string]interface{})
+		for mk, mv := range val.Value {
+			kv[mk] = ToInterface(mv)
+		}
+		return kv
+	}
+	return nil
+}
+
+// String returns string value of the variable value. It returns 0 if the value
+// is not convertible to string.
+func (v *Variable) String() string {
+	c, _ := ToString(v.value)
+	return c
+}
+
+// Bytes returns a byte slice of the variable value. It returns nil if the
+// value is not convertible to byte slice.
+func (v *Variable) Bytes() []byte {
+	c, _ := ToByteSlice(v.value)
+	return c
+}
+
+// Error returns an error if the underlying value is error object. If not,
+// this returns nil.
+func (v *Variable) Error() error {
+	err, ok := v.value.(*Error)
+	if ok {
+		return errors.New(err.String())
+	}
+	return nil
+}
+
+// Object returns an underlying Object of the variable value. Note that
+// returned Object is a copy of an actual Object used in the script.
+func (v *Variable) Object() Object {
+	return v.value
+}
+
+// IsUndefined returns true if the underlying value is undefined.
+func (v *Variable) IsUndefined() bool {
+	return v.value == UndefinedValue
+}