new common ICodeGeneratorBackend interface for all code generator classes

codeGenExperimental/src/prog8/codegen/experimental/ExperiCodeGen.kt

@@ -3,19 +3,19 @@ package prog8.codegen.experimental
 import prog8.code.SymbolTable
 import prog8.code.ast.PtProgram
 import prog8.code.core.CompilationOptions
-import prog8.code.core.IAssemblyGenerator
 import prog8.code.core.IAssemblyProgram
+import prog8.code.core.ICodeGeneratorBackend
 import prog8.code.core.IErrorReporter
 import prog8.codegen.intermediate.IRCodeGen
 import prog8.intermediate.IRFileWriter
 
-class CodeGen(private val program: PtProgram,
-              private val symbolTable: SymbolTable,
-              private val options: CompilationOptions,
-              private val errors: IErrorReporter
-): IAssemblyGenerator {
-    override fun compileToAssembly(): IAssemblyProgram? {
-
+class ExperiCodeGen: ICodeGeneratorBackend {
+    override fun generate(
+        program: PtProgram,
+        symbolTable: SymbolTable,
+        options: CompilationOptions,
+        errors: IErrorReporter
+    ): IAssemblyProgram? {
         // you could write a code generator directly on the PtProgram AST,
         // but you can also use the Intermediate Representation to build a codegen on:
         val irCodeGen = IRCodeGen(program, symbolTable, options, errors)