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package compiler
import (
"encoding/gob"
"fmt"
"io"
"reflect"
"github.com/d5/tengo/compiler/source"
"github.com/d5/tengo/objects"
)
// Bytecode is a compiled instructions and constants.
type Bytecode struct {
FileSet *source.FileSet
MainFunction *objects.CompiledFunction
Constants []objects.Object
}
// Encode writes Bytecode data to the writer.
func (b *Bytecode) Encode(w io.Writer) error {
enc := gob.NewEncoder(w)
if err := enc.Encode(b.FileSet); err != nil {
return err
}
if err := enc.Encode(b.MainFunction); err != nil {
return err
}
// constants
return enc.Encode(b.Constants)
}
// CountObjects returns the number of objects found in Constants.
func (b *Bytecode) CountObjects() int {
n := 0
for _, c := range b.Constants {
n += objects.CountObjects(c)
}
return n
}
// FormatInstructions returns human readable string representations of
// compiled instructions.
func (b *Bytecode) FormatInstructions() []string {
return FormatInstructions(b.MainFunction.Instructions, 0)
}
// FormatConstants returns human readable string representations of
// compiled constants.
func (b *Bytecode) FormatConstants() (output []string) {
for cidx, cn := range b.Constants {
switch cn := cn.(type) {
case *objects.CompiledFunction:
output = append(output, fmt.Sprintf("[% 3d] (Compiled Function|%p)", cidx, &cn))
for _, l := range FormatInstructions(cn.Instructions, 0) {
output = append(output, fmt.Sprintf(" %s", l))
}
default:
output = append(output, fmt.Sprintf("[% 3d] %s (%s|%p)", cidx, cn, reflect.TypeOf(cn).Elem().Name(), &cn))
}
}
return
}
func init() {
gob.Register(&source.FileSet{})
gob.Register(&source.File{})
gob.Register(&objects.Array{})
gob.Register(&objects.Bool{})
gob.Register(&objects.Bytes{})
gob.Register(&objects.Char{})
gob.Register(&objects.Closure{})
gob.Register(&objects.CompiledFunction{})
gob.Register(&objects.Error{})
gob.Register(&objects.Float{})
gob.Register(&objects.ImmutableArray{})
gob.Register(&objects.ImmutableMap{})
gob.Register(&objects.Int{})
gob.Register(&objects.Map{})
gob.Register(&objects.String{})
gob.Register(&objects.Time{})
gob.Register(&objects.Undefined{})
gob.Register(&objects.UserFunction{})
}
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