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Add set index in list, and update lib+examples+tests

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This commit is contained in:
Neemek 2026-08-20 13:44:10 +02:00
parent 8d12c0bdf8
commit 0f905a7fea
Signed by: neemek
GPG key ID: 84FFE4D7D40AB25E
12 changed files with 117 additions and 60 deletions
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35
core/compiler.go
View file

@ -977,6 +977,41 @@ func (c *Compiler) compileAssignFromStack(to Node, sig TypeSignature, declare bo
}
return sig, nil
case IndexNodeType:
if declare {
return nil, c.error(fmt.Sprintf("cannot declare an indexed item"), to)
}
n := to.(*IndexNode)
ssig, err := c.compile(n.source)
if err != nil {
return nil, err
}
isig, err := c.compile(n.index)
if err != nil {
return nil, err
}
if isig.Type() != TypeInteger {
return nil, c.error(fmt.Sprintf("cannot index into list with non-integer (%s)", isig), n.index)
}
switch ssig.Type() {
case TypeList:
lsig := ssig.(*ListSignature)
if !c.typeMatches(sig, lsig.Contents) {
return nil, c.error(fmt.Sprintf("cannot assign value of type %s to list with items of type %s", sig, lsig.Contents), to)
}
c.add(InstructionSetIndexList)
default:
return nil, c.error(fmt.Sprintf("cannot set index of %s", ssig.Type()), n.source)
}
return sig, nil
default:
return nil, c.error(fmt.Sprintf("cannot assign to %s", to.Type()), to)
}

46
core/values.go
View file

@ -117,8 +117,12 @@ type Value interface {
// Get a member from the value. An error is returned if the member does not exist
Get(string) (Value, error)
// Clone create a clone of the value. The returned value is a pointer to a new value of the same type as the value.
Clone() Value
// Copy create a copy of the value. A copy is a direct copy for small data (numbers) and a copy of pointer
// for bigger data (lists, tuples, dicts)
Copy() Value
// Clone create a clone of the value. A clone is new data for all data.
//Clone() Value
}
type NilValue struct{}
@ -143,7 +147,7 @@ func (v *NilValue) Get(_ string) (Value, error) {
return nil, errors.New("nil has no properties")
}
func (v *NilValue) Clone() Value {
func (v *NilValue) Copy() Value {
return &NilValue{}
}
@ -175,7 +179,7 @@ func (v *BoolValue) Get(_ string) (Value, error) {
return nil, errors.New("booleans have no properties")
}
func (v *BoolValue) Clone() Value {
func (v *BoolValue) Copy() Value {
return &BoolValue{
v.Boolean,
}
@ -258,11 +262,11 @@ func (v *ObjectValue) Get(key string) (Value, error) {
}
}
func (v *ObjectValue) Clone() Value {
func (v *ObjectValue) Copy() Value {
m := make(map[string]Value, len(v.Members))
for name, mem := range v.Members {
m[name] = mem.Clone()
m[name] = mem.Copy()
}
return &ObjectValue{
@ -303,7 +307,7 @@ func (v *FloatValue) Get(_ string) (Value, error) {
return nil, errors.New("numbers have no properties")
}
func (v *FloatValue) Clone() Value {
func (v *FloatValue) Copy() Value {
return &FloatValue{
v.Number,
}
@ -334,7 +338,7 @@ func (v *IntegerValue) Get(_ string) (Value, error) {
return nil, errors.New("numbers have no properties")
}
func (v *IntegerValue) Clone() Value {
func (v *IntegerValue) Copy() Value {
return &IntegerValue{
new(big.Int).Set(v.Number),
}
@ -427,7 +431,7 @@ func (v *StringValue) Get(key string) (Value, error) {
return nil, errors.New(fmt.Sprintf("string has no property \"%s\"", key))
}
func (v *StringValue) Clone() Value {
func (v *StringValue) Copy() Value {
return &StringValue{
v.Text,
}
@ -594,15 +598,9 @@ func (v *ListValue) Get(key string) (Value, error) {
return nil, errors.New(fmt.Sprintf("list has no property \"%s\"", key))
}
func (v *ListValue) Clone() Value {
n := make([]Value, len(v.Items))
for i, item := range v.Items {
n[i] = item.Clone()
}
func (v *ListValue) Copy() Value {
return &ListValue{
n,
v.Items,
}
}
@ -635,13 +633,9 @@ func (v *TupleValue) DebugString() string {
return v.String()
}
func (v *TupleValue) Clone() Value {
n := make([]Value, len(v.Items))
for i, item := range v.Items {
n[i] = item.Clone()
}
func (v *TupleValue) Copy() Value {
return &TupleValue{
n,
v.Items,
}
}
@ -718,7 +712,7 @@ func (v *FunctionValue) Get(_ string) (Value, error) {
return nil, errors.New("functions have no properties")
}
func (v *FunctionValue) Clone() Value {
func (v *FunctionValue) Copy() Value {
return &FunctionValue{
v.Name,
v.Params,
@ -758,7 +752,7 @@ func (v *BuiltinFunctionValue) Get(_ string) (Value, error) {
return nil, errors.New("functions have no properties")
}
func (v *BuiltinFunctionValue) Clone() Value {
func (v *BuiltinFunctionValue) Copy() Value {
return &BuiltinFunctionValue{
v.Name,
v.Signature,
@ -807,7 +801,7 @@ func (v *RecordValue) DebugString() string {
return v.String()
}
func (v *RecordValue) Clone() Value {
func (v *RecordValue) Copy() Value {
return &RecordValue{
v.Entries,
}

34
core/vm.go
View file

@ -152,10 +152,14 @@ const (
// is the index. [..., container, index] -> [..., item]
InstructionIndexTuple
// InstructionIndexString index into a string. The lower item is the container, and the top item
// is the index. [..., container, index] -> [..., item]. Produces a new string with the character
// at the position
// is the index. [..., container, index] -> [..., item]. Produces a new string with only the character
// at the indexed position
InstructionIndexString
// InstructionSetIndexList set the item at a given index in a list.
// [..., item, container, index] -> [..., item]
InstructionSetIndexList
// InstructionBreakpoint for debugging purposes
InstructionBreakpoint
)
@ -638,7 +642,7 @@ var DefaultGlobals = map[string]Value{
n, _ := v.Number.Float64()
return &FloatValue{n}, nil
case *FloatValue:
return v.Clone(), nil
return v.Copy(), nil
case *StringValue:
num, err := strconv.ParseFloat(v.Text, FloatSize)
if err != nil {
@ -978,7 +982,7 @@ func (vm *VM) Next() bool {
vm.Stack.Push(v)
case InstructionSetLocal:
value := vm.Stack.Peek().Clone()
value := vm.Stack.Peek().Copy()
name := vm.GetConstant(vm.NextByte()).(*StringValue).Text
vm.setVar(name, value)
@ -986,7 +990,7 @@ func (vm *VM) Next() bool {
case InstructionDeclareLocal:
vm.addVar(
vm.GetConstant(vm.NextByte()).(*StringValue).Text,
vm.Stack.Peek().Clone(),
vm.Stack.Peek().Copy(),
)
case InstructionGetGlobal:
@ -1070,7 +1074,7 @@ func (vm *VM) Next() bool {
vm.Stack.Push(r, l)
case InstructionDuplicate:
vm.Stack.Push(vm.Stack.Peek().Clone())
vm.Stack.Push(vm.Stack.Peek().Copy())
case InstructionAccessProperty:
source := vm.Stack.Pop()
@ -1112,7 +1116,7 @@ func (vm *VM) Next() bool {
vm.error(fmt.Sprintf("index %d out of bounds", n))
}
vm.Stack.Push(l.Items[n].Clone())
vm.Stack.Push(l.Items[n].Copy())
case InstructionIndexTuple:
i := vm.Stack.Pop().(*IntegerValue)
@ -1124,7 +1128,7 @@ func (vm *VM) Next() bool {
vm.error(fmt.Sprintf("index %d out of bounds", n))
}
vm.Stack.Push(t.Items[n].Clone())
vm.Stack.Push(t.Items[n].Copy())
case InstructionIndexString:
i := vm.Stack.Pop().(*IntegerValue)
@ -1138,6 +1142,18 @@ func (vm *VM) Next() bool {
vm.Stack.Push(&StringValue{string(s.Text[n])})
case InstructionSetIndexList:
n := vm.Stack.Pop().(*IntegerValue)
l := vm.Stack.Pop().(*ListValue)
i := n.Number.Int64()
if i < 0 || int64(len(l.Items)) <= i {
vm.error(fmt.Sprintf("index %d out of bounds", i))
}
l.Items[i] = vm.Stack.Peek().Copy()
case InstructionBreakpoint:
/*
// I'm keeping this
@ -1284,7 +1300,7 @@ func (vm *VM) HasNext() bool {
}
func (vm *VM) GetConstant(id Bytecode) Value {
return vm.chunk.Constants[id].Clone()
return vm.chunk.Constants[id].Copy()
}
func (vm *VM) ReadConstant() Value {