codegen: add Interpreter struct

This makes the code easier to use.

1 files changed, 38 insertions, 0 deletions

diff --git a/codegen/interpreter.go b/codegen/interpreter.go
new file mode 100644
index 0000000..8527631
--- /dev/null
+++ b/codegen/interpreter.go
@@ -0,0 +1,38 @@
+package codegen
+
+import (
+	"os"
+
+	"github.com/gnolang/parscan/parser"
+	"github.com/gnolang/parscan/vm1"
+)
+
+const debug = true
+
+type Interpreter struct {
+	*parser.Parser
+	*Compiler
+	*vm1.Machine
+}
+
+func NewInterpreter(p *parser.Parser) *Interpreter {
+	return &Interpreter{p, NewCompiler(), &vm1.Machine{}}
+}
+
+func (i *Interpreter) Eval(src string) (err error) {
+	n := &parser.Node{}
+	if n.Child, err = i.Parse(src); err != nil {
+		return err
+	}
+	if debug {
+		n.Dot(os.Getenv("DOT"), "")
+	}
+	if err = i.CodeGen(n); err != nil {
+		return err
+	}
+	i.Emit(n, vm1.Exit)
+	i.Push(i.Data...)
+	i.PushCode(i.Code)
+	i.SetIP(i.Entry)
+	return i.Run()
+}