#ifndef INTERPRETER_H #define INTERPRETER_H #include "expr.h" #include "token.h" typedef enum { INS_STRING, INS_DOUBLE, INS_BOOLEAN, INS_NULL } ObjectInstanceType; typedef struct Object { ObjectInstanceType instance; union { char* string; double number; int boolean; } value; } Object; const void* VisitLiteralExpression(Expr*); void* VisitGroupingExpression(Expr*); Object* VisitBinaryExpression(Expr*); #endif