small changes

internal/compiler/bytecode.go

@@ -8,13 +8,45 @@ import (
 	"math"
 	"monkey/internal/code"
 	"monkey/internal/object"
+	"strings"
 )
 
+func Indent(text, ident string) string {
+	if text[len(text)-1:] == "\n" {
+		result := ""
+		for _, j := range strings.Split(text[:len(text)-1], "\n") {
+			result += ident + j + "\n"
+		}
+		return result
+	}
+	result := ""
+	for _, j := range strings.Split(strings.TrimRight(text, "\n"), "\n") {
+		result += ident + j + "\n"
+	}
+	return result[:len(result)-1]
+}
+
 type Bytecode struct {
 	Instructions code.Instructions
 	Constants    []object.Object
 }
 
+func (b *Bytecode) String() string {
+	var s strings.Builder
+
+	s.WriteString("Constants:\n")
+	for i, c := range b.Constants {
+		s.WriteString(fmt.Sprintf("%02d %s\n", i, c))
+		if cf, ok := c.(*object.CompiledFunction); ok {
+			s.WriteString(fmt.Sprintf("   Instructions:\n%s\n", Indent(cf.Instructions.String(), "     ")))
+		}
+	}
+
+	s.WriteString(fmt.Sprintf("Instructions:\n%s\n", b.Instructions))
+
+	return s.String()
+}
+
 type encoder struct {
 	bytes.Buffer
 }