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package objects
import (
"fmt"
"strings"
"github.com/d5/tengo/compiler/token"
)
// Map represents a map of objects.
type Map struct {
Value map[string]Object
}
// TypeName returns the name of the type.
func (o *Map) TypeName() string {
return "map"
}
func (o *Map) String() string {
var pairs []string
for k, v := range o.Value {
pairs = append(pairs, fmt.Sprintf("%s: %s", k, v.String()))
}
return fmt.Sprintf("{%s}", strings.Join(pairs, ", "))
}
// BinaryOp returns another object that is the result of
// a given binary operator and a right-hand side object.
func (o *Map) BinaryOp(op token.Token, rhs Object) (Object, error) {
return nil, ErrInvalidOperator
}
// Copy returns a copy of the type.
func (o *Map) Copy() Object {
c := make(map[string]Object)
for k, v := range o.Value {
c[k] = v.Copy()
}
return &Map{Value: c}
}
// IsFalsy returns true if the value of the type is falsy.
func (o *Map) IsFalsy() bool {
return len(o.Value) == 0
}
// Equals returns true if the value of the type
// is equal to the value of another object.
func (o *Map) Equals(x Object) bool {
var xVal map[string]Object
switch x := x.(type) {
case *Map:
xVal = x.Value
case *ImmutableMap:
xVal = x.Value
default:
return false
}
if len(o.Value) != len(xVal) {
return false
}
for k, v := range o.Value {
tv := xVal[k]
if !v.Equals(tv) {
return false
}
}
return true
}
// IndexGet returns the value for the given key.
func (o *Map) IndexGet(index Object) (res Object, err error) {
strIdx, ok := index.(*String)
if !ok {
err = ErrInvalidIndexType
return
}
val, ok := o.Value[strIdx.Value]
if !ok {
val = UndefinedValue
}
return val, nil
}
// IndexSet sets the value for the given key.
func (o *Map) IndexSet(index, value Object) (err error) {
strIdx, ok := ToString(index)
if !ok {
err = ErrInvalidIndexType
return
}
o.Value[strIdx] = value
return nil
}
// Iterate creates a map iterator.
func (o *Map) Iterate() Iterator {
var keys []string
for k := range o.Value {
keys = append(keys, k)
}
return &MapIterator{
v: o.Value,
k: keys,
l: len(keys),
}
}
|
