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|
package core
import (
"fmt"
"jinx/pkg/lang/vm/code"
"jinx/pkg/lang/vm/executor"
"jinx/pkg/lang/vm/value"
)
var Natives = []any{
n(":core:setup_type", 1, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
// Add the very important "$add_method" method to the Type type.
// Without it no other methods can be created.
typeRef, err := ensureType[value.TypeRefData](args[0], value.TypeRefType)
if err != nil {
return value.Value{}, err
}
addMethodGlobal, ok, err := exe.GetGlobal(":core:Type:$add_method#native")
if err != nil {
return value.Value{}, err
}
if !ok {
panic("missing Type:$add_method implementation")
}
addMethodFn, err := ensureType[value.FunctionData](addMethodGlobal, value.FunctionType)
if err != nil {
return value.Value{}, err
}
typeRef.AddMethod(
exe.Mem(),
"$add_method",
value.NewNativeFunction(addMethodFn.Native(), 2).Data().(value.FunctionData),
)
return value.Value{}, nil
}),
n(":core:Type:$add_method", 2, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
ref, err := ensureTypeThis[value.TypeRefData](exe, value.TypeRefType)
if err != nil {
return value.Value{}, err
}
nameData, err := ensureType[value.StringData](args[0], value.StringType)
if err != nil {
return value.Value{}, err
}
name, err := nameData.RawString(exe.Mem())
if err != nil {
return value.Value{}, err
}
fn, err := ensureType[value.FunctionData](args[1], value.FunctionType)
if err != nil {
return value.Value{}, err
}
return value.Value{}, ref.AddMethod(exe.Mem(), name, fn)
}),
n(":core:Int:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewInt(0), nil
}),
n(":core:Float:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewFloat(0.0), nil
}),
n(":core:String:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewString(exe.Mem(), "")
}),
n(":core:Bool:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewBool(false), nil
}),
n(":core:Array:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewArray(exe.Mem(), args)
}),
n(":core:Function:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewFunction(code.NewPos(0, 0), 0), nil
}),
n(":core:Type:$init", 0, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
return value.NewType(exe.Mem(), "")
}),
n(":core:Array:push", 2, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
array, err := ensureType[value.ArrayData](args[0], value.ArrayType)
if err != nil {
return value.Value{}, err
}
element := args[1]
return value.Value{}, array.Push(exe.Mem(), element)
}),
n(":core:Array:pop", 1, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
array, err := ensureType[value.ArrayData](args[0], value.ArrayType)
if err != nil {
return value.Value{}, err
}
return array.Pop(exe.Mem())
}),
n(":core:Array:length", 1, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
array, err := ensureType[value.ArrayData](args[0], value.ArrayType)
if err != nil {
return value.Value{}, err
}
length, err := array.Len(exe.Mem())
if err != nil {
return value.Value{}, err
}
return value.NewInt(int64(length)), nil
}),
n(":core:say", 1, func(exe executor.Exectutor, args []value.Value) (value.Value, error) {
message := args[0]
s, err := message.Data().String(exe.Mem())
if err != nil {
return value.Value{}, err
}
fmt.Println(s)
return value.Value{}, nil
}),
}
type native struct {
name string
argCount int
fn executor.NativeFunc
}
func n(name string, argCount int, fn executor.NativeFunc) native {
return native{name, argCount, fn}
}
func (n native) Name() string {
return n.name
}
func (n native) ArgCount() int {
return n.argCount
}
func (n native) Fn() executor.NativeFunc {
return n.fn
}
func ensureTypeThis[D value.Data](exe executor.Exectutor, t value.TypeKind) (D, error) {
this, err := exe.GetThis()
if err != nil {
return *new(D), err
}
return ensureType[D](this, t)
}
func ensureType[D value.Data](val value.Value, t value.TypeKind) (D, error) {
if val.Type() != t {
return *new(D), fmt.Errorf("expected type %s, got %s", t, val.Type())
}
return val.Data().(D), nil
}
|
