rearrange builtins
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This commit is contained in:
Chuck Smith
2024-03-24 14:00:22 -04:00
parent 387bb80094
commit b4ba660704
47 changed files with 652 additions and 515 deletions

View File

@@ -1,14 +1,6 @@
package object
import (
"bytes"
"fmt"
"hash/fnv"
"monkey/ast"
"monkey/code"
"strings"
)
// Type represents the type of an object
type ObjectType string
const (
@@ -39,333 +31,19 @@ type Immutable interface {
Clone() Object
}
// Object represents a value and implementations are expected to implement
// `Type()` and `Inspect()` functions
type Object interface {
Type() ObjectType
String() string
Inspect() string
}
type Integer struct {
Value int64
}
type CompiledFunction struct {
Instructions code.Instructions
NumLocals int
NumParameters int
}
func (i *Integer) Type() ObjectType {
return INTEGER_OBJ
}
func (i *Integer) Inspect() string {
return fmt.Sprintf("%d", i.Value)
}
func (i *Integer) Clone() Object {
return &Integer{Value: i.Value}
}
func (i *Integer) String() string {
return i.Inspect()
}
func (i *Integer) Equal(other Object) bool {
if obj, ok := other.(*Integer); ok {
return i.Value == obj.Value
}
return false
}
type Boolean struct {
Value bool
}
func (b *Boolean) Type() ObjectType {
return BOOLEAN_OBJ
}
func (b *Boolean) Inspect() string {
return fmt.Sprintf("%t", b.Value)
}
func (b *Boolean) Clone() Object {
return &Boolean{Value: b.Value}
}
func (b *Boolean) String() string {
return b.Inspect()
}
func (b *Boolean) Equal(other Object) bool {
if obj, ok := other.(*Boolean); ok {
return b.Value == obj.Value
}
return false
}
type Null struct{}
func (n *Null) Type() ObjectType {
return NULL_OBJ
}
func (n *Null) Inspect() string {
return "null"
}
func (n *Null) String() string {
return n.Inspect()
}
func (n *Null) Equal(other Object) bool {
_, ok := other.(*Null)
return ok
}
type ReturnValue struct {
Value Object
}
func (rv *ReturnValue) Type() ObjectType {
return RETURN_VALUE_OBJ
}
func (rv *ReturnValue) Inspect() string {
return rv.Value.Inspect()
}
func (rv *ReturnValue) String() string {
return rv.Inspect()
}
type Error struct {
Message string
}
func (e *Error) Type() ObjectType {
return ERROR_OBJ
}
func (e *Error) Inspect() string {
return "Error: " + e.Message
}
func (e *Error) Clone() Object {
return &Error{Message: e.Message}
}
func (e *Error) String() string {
return e.Message
}
type Function struct {
Parameters []*ast.Identifier
Body *ast.BlockStatement
Env *Environment
}
func (f *Function) Type() ObjectType {
return FUNCTION_OBJ
}
func (f *Function) Inspect() string {
var out bytes.Buffer
params := []string{}
for _, p := range f.Parameters {
params = append(params, p.String())
}
out.WriteString("fn")
out.WriteString("(")
out.WriteString(strings.Join(params, ", "))
out.WriteString(") {\n")
out.WriteString(f.Body.String())
out.WriteString("\n}")
return out.String()
}
func (f *Function) String() string {
return f.Inspect()
}
type String struct {
Value string
}
func (s *String) Type() ObjectType {
return STRING_OBJ
}
func (s *String) Inspect() string {
return fmt.Sprintf("%#v", s.Value)
}
func (s *String) Clone() Object {
return &String{Value: s.Value}
}
func (s *String) String() string {
return s.Value
}
func (s *String) Equal(other Object) bool {
if obj, ok := other.(*String); ok {
return s.Value == obj.Value
}
return false
}
type BuiltinFunction func(args ...Object) Object
type Builtin struct {
Name string
Fn BuiltinFunction
}
func (b *Builtin) Type() ObjectType {
return BUILTIN_OBJ
}
func (b *Builtin) Inspect() string {
return fmt.Sprintf("<built-in function %s>", b.Name)
}
func (b *Builtin) String() string {
return b.Inspect()
}
type Array struct {
Elements []Object
}
func (ao *Array) Type() ObjectType {
return ARRAY_OBJ
}
func (ao *Array) Inspect() string {
var out bytes.Buffer
elements := []string{}
for _, e := range ao.Elements {
elements = append(elements, e.Inspect())
}
out.WriteString("[")
out.WriteString(strings.Join(elements, ", "))
out.WriteString("]")
return out.String()
}
func (ao *Array) String() string {
return ao.Inspect()
}
func (ao *Array) Equal(other Object) bool {
if obj, ok := other.(*Array); ok {
if len(ao.Elements) != len(obj.Elements) {
return false
}
for i, el := range ao.Elements {
cmp, ok := el.(Comparable)
if !ok {
return false
}
if !cmp.Equal(obj.Elements[i]) {
return false
}
}
return true
}
return false
}
type HashKey struct {
Type ObjectType
Value uint64
}
func (b *Boolean) HashKey() HashKey {
var value uint64
if b.Value {
value = 1
} else {
value = 0
}
return HashKey{Type: b.Type(), Value: value}
}
// Hashable is the interface for all hashable objects which must implement
// the HashKey() method which returns a HashKey result.
type Hashable interface {
HashKey() HashKey
}
func (i *Integer) HashKey() HashKey {
return HashKey{Type: i.Type(), Value: uint64(i.Value)}
}
func (s *String) HashKey() HashKey {
h := fnv.New64a()
h.Write([]byte(s.Value))
return HashKey{Type: s.Type(), Value: h.Sum64()}
}
type HashPair struct {
Key Object
Value Object
}
type Hash struct {
Pairs map[HashKey]HashPair
}
func (h *Hash) Type() ObjectType {
return HASH_OBJ
}
func (h *Hash) Inspect() string {
var out bytes.Buffer
pairs := []string{}
for _, pair := range h.Pairs {
pairs = append(pairs, fmt.Sprintf("%s: %s", pair.Key.Inspect(), pair.Value.Inspect()))
}
out.WriteString("{")
out.WriteString(strings.Join(pairs, ", "))
out.WriteString("}")
return out.String()
}
func (h *Hash) String() string {
return h.Inspect()
}
func (h *Hash) Equal(other Object) bool {
if obj, ok := other.(*Hash); ok {
if len(h.Pairs) != len(obj.Pairs) {
return false
}
for _, pair := range h.Pairs {
left := pair.Value
hashed := left.(Hashable)
right, ok := obj.Pairs[hashed.HashKey()]
if !ok {
return false
}
cmp, ok := left.(Comparable)
if !ok {
return false
}
if !cmp.Equal(right.Value) {
return false
}
}
return true
}
return false
}
func (cf *CompiledFunction) Type() ObjectType {
return COMPILED_FUNCTION_OBJ
}
func (cf *CompiledFunction) Inspect() string {
return fmt.Sprintf("CompiledFunction[%p]", cf)
}
func (cf *CompiledFunction) String() string {
return cf.Inspect()
}
type Closure struct {
Fn *CompiledFunction
Free []Object
}
func (c *Closure) Type() ObjectType {
return CLOSURE_OBJ
}
func (c *Closure) Inspect() string {
return fmt.Sprintf("Closure[%p]", c)
}
func (c *Closure) String() string {
return c.Inspect()
}
// BuiltinFunction represents the builtin function type
type BuiltinFunction func(args ...Object) Object